He's absolutely right, it's all a matter of confusion on your part, and suboptimal explanation on his. Just know the Main Fact and the Main Confusion Point and that will clear up any mist (But before i say them, keep in mind that by saying right or left visual fields i mean the right or the left parts of the SINGLE picture you perceive eventually): 1- The Main Fact: The Right visual field is perceived by the left cortex and vice versa, That's the GOLDEN rule, so keep that in mind as a precondition that has to be fulfilled; so if we want the RT field to be perceived by the left cortex we need A) left temporal fibers and B) Right nasal fibres; and that's simply because the temporal ones don't cross while the nasal ones do. If we were to use the Right temporal fibres (temporal fibres of the Right eye) to perceive the right visual field, that would mean that it would have been perceived by the right cortex, and that would have violated our precondition. Remember that we're talking about the visual field as a whole; as a SINGLE picture. Now let's take the visual field of the right eye setting aside the left one for a second. You need to know that the right eye sees both right and left visual fields (right and left parts of the visual field), so cover the left eye for me for a second and see only with the right one: You'll see the right part of your one-eye visual field using the nasal fibres which will cross and go to your LEFT cortex. the left part of your one-eye (the right one remember) visual field on the contrary, is perceived using the temporal fibres, which will stay on the same side, till it reaches the RIGHT cortex; that means that a man with only one functional eye uses both his right and left cortices!! 2- The Main Confusion Point: Students most often confuse between temporal fibres and temporal part of visual field. and to clear that confusion, just know that the RIGHT part of your visual field has a temporal and a nasal portion (you can think of it as peripheral and central it's only a matter of terminology), so as the left part of that visual field (it has temporal and nasal portions too). The temporal portion of the right visual field is perceived by nasal fibres of the right eye, while the nasal portion of the right visual field is perceived by temporal fibres of the left eye. Read those last couple of sentences again and case closed.
This is an amazing resource and lovely hand drawn diagrams. Clear explanation too. I remember doing this in my first year of med school and it still sticks with me today!
What he labelled in the video is correct. Notice the difference; he drew fields AND eyes (the small balls/circles): Fibers coming from temporal field of vision, go to nasal part of the eye and cross (because they ARE NASAL FIBERS but they give info about temporal(lateral) field/vision), and temporal fibers of temporal part of the eye that don’t cross give info about the nasal field (medial field) and do not cross. There's a difference between vision and fibers. It's always the opposite.
This video is perfectly correct in the crossover concept. The axons at the "nasal" retina are responsible for "temporal" vision. That's what is labelled in the video.These cross over at the chiasma. Similarly, the axons at the "temporal" retina are responsible for" nasal" vision.
i read in my textbook that the fiber from the nasal half of the retina of each side cross to the contralateral while the fibers representing the temporal half REMAINS UNCROSSED
You're right! I was thinking the same thing then I thought someone in the comment must have pointed it out and I found your comment. Thanks for pointing this mistake out
Actually this video is perfectly alright. Let me explain because the uploader thought we are genius and some of us know and some of us dont know few fundamentals. Basically for example lets take left eye We know there are two type of fibres nasal and temporal. Nasal fibres carry temporal field of vision of same eye and temporal fibres carry nasal visual field of same eye. I hope now u understand the video 😊
If temporal fibers are carrying nasal vision then lesions at level of optic chiasma should cause binasal hemianopia because these temporal fibers are actually carrying nasal vision. Isn’t it so ??😑 Someone plz explain this
This is just my perspective, so take it for what it's worth. If you ever redo this video, if you draw the two temporal retinal pathways first at the very outset and indicate the nasal fields they cover and then draw the nasal retinal pathways and the temporal fields they cover, it would be a lot easier for students to grasp what's going on IMHO. However, great job as always. Love your videos.
Good video! You explanations on the deficits after the LGN could definitely benefit from further research. The calcarine sulcus separates the parietal and the occipital lobes, and different branches of the visual pathway go to each.. you will have a homonymous quadrantanopia that's either superior or inferior, depending on affected area -- they're not all superior. In factt, what you have actually drawn at "D" would ,more than likely produce a "inferior" quadrantanopia, not a superior one. As it's projecting more towards the parietal.
there is a mistake in the optic tract, the right information is :: Left optic tract - contains fibres from the left temporal (lateral) retina, and the right nasal (medial) retina. Right optic tract - contains fibres from the right temporal retina, and the left nasal retina.
Wow now it's perfectly alright. I had doubt in lesions and now it's cleared. This is correct guys. You have to understand the visual field and fibres that catch it concept and you'll get it
Is it just me or this video confuses Optic Tract and Optic radiations? Is nobody noticing that? Optic tract goes from after the chiasm to the lateral geniculate body. Optic radiations are the geniculocalcarine tracts, who connect the two structures they are named after.
hi armando you earn the respect with such a artistic way of presentation and make every thing so easy but there is a mistake i would like to mention that optic track is before the LGB and not after that.i hope you will make it clear in coming lecture.
This video is a little incorrect. The axons from the nasal retina should be the axons that cross over at the optic chiasm. The axons from the temporal retina are the axons that do not cross over.
it is correct, look again, the temporal half of the visual field falls onto the nasal half of the retina, thus forming an inverted image. That is how it is shown in the video, temporal field is labelled and shown to fall onto the nasal retina and decussate into the opposite optic tract.
Don't confuse in optic tract side determination in homonymus heminopia because of that the brain hemispheres are contralateral in action you can depend on the eye that loss the temporal vision because the nasal parts was converted in optic chaizma (-) and the optic tract is contra lateral(-) (-×-=+) so the temporal vision is indcates the side of lesion in homonymus heminopoia
This video is perfectly correct in the crossover concept. The axons at the "nasal" retina are responsible for "temporal" vision. That's what is labelled in the video.These cross over at the chiasma. Similarly, the axons at the "temporal" retina are responsible for" nasal" vision. ps:labelled optic tracts are actually the optic radiations.
Why people say this information is wrong? Nasal retina catch the contralateral field camp. It means the temporal field, and these are the ones that crossed over the quiasma.. Simple.. So, he's right. Isn't he?
the eye works as a camera so nasal field actually projects on the temporal side and vice versa so he is right cos he is taling abt the visual field and not the retina's nasal and temporal side
@@noumanhakeem589 only nasal fibers ''change side'', while temporal fibers remane on the same side. In this way we are able to process the whole left visual field on the right side of the brain and the right visual field on the left side of the brain.
@@francescameli8255 the right sees the left side of the visual field from both eyes and the left sees the right, yes. i still dont get where's the mistake in this video
4:07 : If in the temporal part it results in Right Superior Homonimous Quadranopsia but if in the parietal side it results in Right Inferior Homonimous Quadranopsia
Fantastic job plus nice schema! But i think you should've labelled the nasal and temporal retina somewhere around the eyeballs. Hence clarifying the cross over concept.
supper .... I Had a big confusion of how the fisual fields of each eye reach the nasal and temporal parts of the retina..... thanks cleared all the douts..... fantastic
I'm kind of confused because in my book the crossover parts are mixed up compared to this video. My book says the left temporal does not crossover, but the left nasal does and the right temporal does not, while the right nasal does. I am very confused.
Thank you so much for your help and explanation you are a life saver, all love and support from Algeria medical world 🇩🇿 I have remarked a little confusion, so the optic tract is the structure which origantes from the optic chiasma to the lateral genuclate body, meanwhile the structure you are reffering to as the optic tract (from the LGB to the calcariane cortex) is not the optic tract but it's the optic radiations
According to my textbook it say the visual cortex receives information from the temporal part of the same side while the nasal part of the opposite side which means the nasal part is the one crossing not the temporal part
Great video, but I think it is important to note that lesions of the optic radiations do not always result in a *superior* quadrantanopia. There are two optic radiations on each side - superior (Baum's loop) and inferior (Meyer's loop). Lesions of Baum's loop result in homonymous inferior quadrantanopia whereas those of Meyer's loop result in homonymous superior quadrantanopia. Just like nasal and temporal fibres receive information from their respective contralateral fields, the superior and inferior fibres do the same!
Nice Video, but isnt the C lesion meant to be a left homonymous hemianopia due to the fact that the laterality is based on the temporal field of the affected eye. And so the temporal field of the left eye is affected
I think the confusing part is using the terms "nasal" and "temporal" when talking about visual fields. Those should be referred as "medial" or "lateral" because nasal and temporal are referring to the actual retina.
💥💥💥💥There's a mistake in this video, you labelled the optic radiation as the optic tract. The correct sequence is optic nerve, optic chiasma, optic tract, lateral geniculate nucleus, optic radiation. Not the other way round. Viewers please take note. 💥💥💥
An eye consultant at Woolverhampton took my left eye out to show his pupil how it is done streams of tears came down my face but afterwards I have never been able to see again in my left eye since that happened, my optician told me he had damaged my retina.
Wrong information, Wrong assumptions. Nobody takes the eye out of the socket for surgery. You can't severe the Eyeball from the Optic nerve and fix it back. Hence, eye surgeries are done on the Eyeball within the socket. The only time an eye surgeon would do so it's mostly done to save the other eyeball if there's severe injury to the affected eye with high probability of an infection that can spreading to the other eye.
It was nothing to do with eye surgery my friend as you say unlikely they would have done it. He was simply demonstrating to his student pupil how to take an eyeball out. I recall lots of water running down my face never knew I could have so many tears. It was my optician who later told me that there was no reason why he should have done it and also confirmed that my retina was now damaged for life. I do not understand eyes only that I was made blind from this in my left eye and still that eye is blind ever since. He had asked me to write consent form but I didn't realize there was no need for him to take out my eye just to look in the back of it. There was no infection in either of my eyes therefore no risk of cross infection. Just went there because my eye pressure was high. But thank you for the information it is good to know these things.
Crossing of optic nerves is ok!but one mistake is that the light is coming from the left and right visual field and enter into the ratina,here has some problems.
The link between retina and visual field is incorrect. It does not take into account the optics of the eye. The outgoing rays must cross in the eye nodal point and they don't.
🧠 TEST YOUR KNOWLEDGE FROM THIS LECTURE! ✅
youmakr.ai/test-playground/questionnaire/673d42d7859b9c170836ee6a
Thank you, you’ve made it much easier 🤍
Optic nerve -> optic chiasm -> optic tract -> (thalamus) lateral geniculate body -> visual cortex (occipital ) as optic radiation
the order is optic nerve, optic chiasma, optic tract, lateral geniculate body, optic radiations then visual cortex basically
Thanks! I've been looking for a written out version of this for a really long time and I finally found it
@@Wiimaster20091 😂😂😂😂
بسم الله ما شاء الله لا قوة إلا بالله
@@fatihabdjn9877 assingment برضو ههههه ؟
Yes it has been incorrectly labelled as optic tract instead of radiation!
He's absolutely right, it's all a matter of confusion on your part, and suboptimal explanation on his. Just know the Main Fact and the Main Confusion Point and that will clear up any mist (But before i say them, keep in mind that by saying right or left visual fields i mean the right or the left parts of the SINGLE picture you perceive eventually):
1- The Main Fact: The Right visual field is perceived by the left cortex and vice versa,
That's the GOLDEN rule, so keep that in mind as a precondition that has to be fulfilled; so if we want the RT field to be perceived by the left cortex we need A) left temporal fibers and B) Right nasal fibres; and that's simply because the temporal ones don't cross while the nasal ones do. If we were to use the Right temporal fibres (temporal fibres of the Right eye) to perceive the right visual field, that would mean that it would have been perceived by the right cortex, and that would have violated our precondition.
Remember that we're talking about the visual field as a whole; as a SINGLE picture. Now let's take the visual field of the right eye setting aside the left one for a second. You need to know that the right eye sees both right and left visual fields (right and left parts of the visual field), so cover the left eye for me for a second and see only with the right one: You'll see the right part of your one-eye visual field using the nasal fibres which will cross and go to your LEFT cortex. the left part of your one-eye (the right one remember) visual field on the contrary, is perceived using the temporal fibres, which will stay on the same side, till it reaches the RIGHT cortex; that means that a man with only one functional eye uses both his right and left cortices!!
2- The Main Confusion Point: Students most often confuse between temporal fibres and temporal part of visual field. and to clear that confusion, just know that the RIGHT part of your visual field has a temporal and a nasal portion (you can think of it as peripheral and central it's only a matter of terminology), so as the left part of that visual field (it has temporal and nasal portions too).
The temporal portion of the right visual field is perceived by nasal fibres of the right eye, while the nasal portion of the right visual field is perceived by temporal fibres of the left eye. Read those last couple of sentences again and case closed.
This was amazing thank you
Thank you for explaining this! 🤩
thank you suchhh a good explanation
Lovely explanatiom
Thanks for taking out the time to type out such a great explanation!
This is an amazing resource and lovely hand drawn diagrams. Clear explanation too. I remember doing this in my first year of med school and it still sticks with me today!
Thank you from iraqi optometrist
THE SIMPLEST VIDEO ON RUclips! I've been confused over and over again. Thank you for teaching it with clarity
Yes !!! #Nainann
There is a mistake in this video fibres from temporal hemiretina donot cross, while the fibres from nasal hemiretina cross.
What he labelled in the video is correct.
Notice the difference; he drew fields AND eyes (the small balls/circles):
Fibers coming from temporal field of vision, go to nasal part of the eye and cross (because they ARE NASAL FIBERS but they give info about temporal(lateral) field/vision), and temporal fibers of temporal part of the eye that don’t cross give info about the nasal field (medial field) and do not cross. There's a difference between vision and fibers. It's always the opposite.
Tq for clearing my confusion!❤
This man just need one page to clear every concepts of the topic😎 you’re incredible 🤩 Thanks a lot sir!❤
armando you are the best artist in explanation videos never listen to foolish critics we respect and appreciate you
This video is perfectly correct in the crossover concept. The axons at the "nasal" retina are responsible for "temporal" vision. That's what is labelled in the video.These cross over at the chiasma. Similarly, the axons at the "temporal" retina are responsible for" nasal" vision.
Yup. He should do the same color for each nasal retina to prevent confusion bcs Im confused too at first haha
Andrea Joseph thanks for the information..
I got little bit confused
Thanks for posting the info. I was just introduced to this last week. You sound brilliant :)
thank you, your comment really helped
i read in my textbook that the fiber from the nasal half of the retina of each side cross to the contralateral while the fibers representing the temporal half REMAINS UNCROSSED
Yes, and that's exactly what he has depicted here. You're confusing the retinal fibres with the side of the visual field that they detect.
Yes , same is the case with me and I have confirmed it in three books, nasal one goes to contralateral side and not temporal one
You're right! I was thinking the same thing then I thought someone in the comment must have pointed it out and I found your comment. Thanks for pointing this mistake out
I was really confused about this concept until I watched your helpful video. Thank you for this!
Thank you so much for teaching me since first year till now, your videos have been a great help, i love all of them!
1:37 temporal fibers dont cros each side only nasal fibers cross their respective sides
you hv mislabelled optic tract. its the optic radiations
Exactly
Geniculo-calcarine tract is also known as Optic Radiations!!
Yes.. He has mislabelled optic tract as geniculpcalcarine pathway.. But i think he's showing optic radiation by lines.
Yeah optic tract should be between Optic chiasm and LGN
not just that, even LGB comes after optic tract, the diagram itself is wrong
Actually this video is perfectly alright.
Let me explain because the uploader thought we are genius and some of us know and some of us dont know few fundamentals.
Basically for example lets take left eye
We know there are two type of fibres nasal and temporal.
Nasal fibres carry temporal field of vision of same eye and temporal fibres carry nasal visual field of same eye.
I hope now u understand the video 😊
suhail lone Thanks alot!
really thank you man!
but thats what he showed when drawing tho
Thank you man! 😊
If temporal fibers are carrying nasal vision then lesions at level of optic chiasma should cause binasal hemianopia because these temporal fibers are actually carrying nasal vision.
Isn’t it so ??😑
Someone plz explain this
This is just my perspective, so take it for what it's worth. If you ever redo this video, if you draw the two temporal retinal pathways first at the very outset and indicate the nasal fields they cover and then draw the nasal retinal pathways and the temporal fields they cover, it would be a lot easier for students to grasp what's going on IMHO. However, great job as always. Love your videos.
Optic tract is before lateral geniculate body ,optic radiation is the one after Lgb
Good video! You explanations on the deficits after the LGN could definitely benefit from further research. The calcarine sulcus separates the parietal and the occipital lobes, and different branches of the visual pathway go to each.. you will have a homonymous quadrantanopia that's either superior or inferior, depending on affected area -- they're not all superior. In factt, what you have actually drawn at "D" would ,more than likely produce a "inferior" quadrantanopia, not a superior one. As it's projecting more towards the parietal.
there is a mistake in the optic tract, the right information is ::
Left optic tract - contains fibres from the left temporal (lateral) retina, and the right nasal (medial) retina.
Right optic tract - contains fibres from the right temporal retina, and the left nasal retina.
This is the true Explanation
I was trying to figure this out last week and was so confused. You explained it so clearly, thank you!
i dont konw what to say, i just hope that such a talent not lost is .... this style of teaching is so high..
So the order is optic nerve, optic chiasm, optic tract, lateral geniculate body, optic radiation, visual cortex
Wow. You explained 1hours worth of lecture in just 2minutes. THANK YOU!!!!
Wow now it's perfectly alright. I had doubt in lesions and now it's cleared. This is correct guys. You have to understand the visual field and fibres that catch it concept and you'll get it
I have been difficulting in understanding it you explain it so awesomely and simply That I understand it so good thank you so much🌺🌺🌺🙏🙏🙏🙏
Incredible clarity, practicing on my friends this evening, thanks so much .
Is it just me or this video confuses Optic Tract and Optic radiations? Is nobody noticing that?
Optic tract goes from after the chiasm to the lateral geniculate body. Optic radiations are the geniculocalcarine tracts, who connect the two structures they are named after.
I'm not even studying this, i'm an arc student but these are so much better than those "educational" Vsauce/smarter everyday type videos.
hi armando you earn the respect with such a artistic way of presentation and make every thing so easy but there is a mistake i would like to mention that optic track is before the LGB and not after that.i hope you will make it clear in coming lecture.
study note: nasal field fibres don't cross chiasm. temporal field fibres do cross optic chiasm.
This video is a little incorrect. The axons from the nasal retina should be the axons that cross over at the optic chiasm. The axons from the temporal retina are the axons that do not cross over.
it is correct, look again, the temporal half of the visual field falls onto the nasal half of the retina, thus forming an inverted image. That is how it is shown in the video, temporal field is labelled and shown to fall onto the nasal retina and decussate into the opposite optic tract.
it did seem off for a sec but look again :) as mentioned below
amanda you are right
no, she is right,,, only nasal fibers should cross in the optic
chisam ,,, im studying now Pathophysiology she is right
Amanda Colon nasal axons will carry the temporal visual field it is correct in the video
He took my prof's lecture but made 100x better
Don't confuse in optic tract side determination in homonymus heminopia because of that the brain hemispheres are contralateral in action you can depend on the eye that loss the temporal vision because the nasal parts was converted in optic chaizma (-) and the optic tract is contra lateral(-) (-×-=+) so the temporal vision is indcates the side of lesion in homonymus heminopoia
3:54 the right homonymous superior quadrantanopia is seen in temporal lobe defect, and lower in parietal lobe defect
Wonderful video very easy to visualise it when you put it like that. Could have been very helpful for my exam on this subject 2 weeks ago.
This video is perfectly correct in the crossover concept. The axons at the "nasal" retina are responsible for "temporal" vision. That's what is labelled in the video.These cross over at the chiasma. Similarly, the axons at the "temporal" retina are responsible for" nasal" vision.
ps:labelled optic tracts are actually the optic radiations.
wow i was so confused about the optic tract as labeled in the video...thankeww
Why people say this information is wrong? Nasal retina catch the contralateral field camp. It means the temporal field, and these are the ones that crossed over the quiasma.. Simple.. So, he's right. Isn't he?
Waaa finally I found a clear, short and precise explanation! Thanks, you removed a big glich in my brain 👌
U have done a mistake .... only nasal fibers cross each other in optic chaisma not the temporal and nasal u have to correct it plz...
the eye works as a camera so nasal field actually projects on the temporal side and vice versa so he is right cos he is taling abt the visual field and not the retina's nasal and temporal side
he is talking about fibers talking about track so in this sense he is mislabelled tha diagram
@@noumanhakeem589 only nasal fibers ''change side'', while temporal fibers remane on the same side. In this way we are able to process the whole left visual field on the right side of the brain and the right visual field on the left side of the brain.
@@francescameli8255 the right sees the left side of the visual field from both eyes and the left sees the right, yes. i still dont get where's the mistake in this video
Its actually correct
Amazing way of explanation. Your drawing is superb.
The crossing of fibers in optic chaisma is wrong . Its actually reverse of what is written or mentioned in video .
Please correct it .
i just got saved from the wrath of physiology...thank you
Very clear illustrations!
4:07 : If in the temporal part it results in Right Superior Homonimous Quadranopsia but if in the parietal side it results in Right Inferior Homonimous Quadranopsia
Optic chiasma is formed by fibres from nasal part not by temporal part 😊
I was wondering if anyone else noticed that too.
There is a difference between nasal fibres and nasal field radiations. The video is absolutely correct; u r confused
Yeah…it’s reversed here!
Thank you Armando! Still watching in 2020 :)
Superb video. Well done and thanks!
Thanks a lot ....my neurologist teacher just explained this in class recently
Fantastic job plus nice schema! But i think you should've labelled the nasal and temporal retina somewhere around the eyeballs. Hence clarifying the cross over concept.
Armando you one gifted individual. Thank you for the excellent videos.
Brilliant video! Thank you! 😊
Great video couldn't be that precise and that clear than this 👌
Thanks a lot
In the optic tract the temporal field doesn’t crosss
Its the nasal field that crosses
Thank you so much sir 🙏
You've made this topic easier 💜
Just won a bet with your video. Priceless! Nice work bro.
supper .... I Had a big confusion of how the fisual fields of each eye reach the nasal and temporal parts of the retina..... thanks cleared all the douts..... fantastic
Sirrrr excellent descriptionn🥰🥰🥰❤❤❤❤❤thanks and lots of blessings from pakistan❤🥰
Best explanation one can give
I'm kind of confused because in my book the crossover parts are mixed up compared to this video. My book says the left temporal does not crossover, but the left nasal does and the right temporal does not, while the right nasal does. I am very confused.
The temporal fibers do not cross over according to my studies as well. From other comments it looks like he labeled them wrong.
There is a clear mistake. It's central scotoma not central scomata. Anyway this video helped me revise the concept easily. Thanks for the video 👍
Your drawing are so good!! Thank you! This video really helped me
Temporal crossovers... 🔑
Thank you so much for your help and explanation you are a life saver, all love and support from Algeria medical world 🇩🇿
I have remarked a little confusion, so the optic tract is the structure which origantes from the optic chiasma to the lateral genuclate body, meanwhile the structure you are reffering to as the optic tract (from the LGB to the calcariane cortex) is not the optic tract but it's the optic radiations
Sir thank very much all very good , how much your crystalic for the eye 👁️👁️👁️ please let me know please. Thanks for you sir and God be bless
Thanks man. AT last. !! I found a really helpful video !
Only corrections are it's 'central scotoma' and it's 'homonymous hemianopia' for spelling
this information is incorrect as temporal side will not cross it goes ipsilaterally and nasal part will cross and form optic chiasm .
According to my textbook it say the visual cortex receives information from the temporal part of the same side while the nasal part of the opposite side which means the nasal part is the one crossing not the temporal part
thank you very much.... you actually beautifully explained the concept.
Such a helpful video.Thankyou so much!!!
Great video, but I think it is important to note that lesions of the optic radiations do not always result in a *superior* quadrantanopia.
There are two optic radiations on each side - superior (Baum's loop) and inferior (Meyer's loop). Lesions of Baum's loop result in homonymous inferior quadrantanopia whereas those of Meyer's loop result in homonymous superior quadrantanopia.
Just like nasal and temporal fibres receive information from their respective contralateral fields, the superior and inferior fibres do the same!
The geniculocalcarine tract is the OPTIC RADIATION, not optic tract.
Sir both sides nasal field cross each other not temporal..... Plzz focus on this... Thank you
c'était génial merci le sang
thankyou very much sir! you made my life easy
Very good explanation
Best explanation Ive seen! Thank you!
A great video! Thank you!
Nice Video, but isnt the C lesion meant to be a left homonymous hemianopia due to the fact that the laterality is based on the temporal field of the affected eye. And so the temporal field of the left eye is affected
Super helpful, thank you for making this!
Case C is left homnymous hemianopia and not right because lesion is on left side
I think the confusing part is using the terms "nasal" and "temporal" when talking about visual fields. Those should be referred as "medial" or "lateral" because nasal and temporal are referring to the actual retina.
Outstanding! in one word.. Absolutely!
optic tract is wrongly mentioned it should have been optic raduation
💥💥💥💥There's a mistake in this video, you labelled the optic radiation as the optic tract.
The correct sequence is optic nerve, optic chiasma, optic tract, lateral geniculate nucleus, optic radiation. Not the other way round.
Viewers please take note. 💥💥💥
This has really been helpful
Hi, think this video is outdated. the temporal fibers dont cross in the optic chiasm instead the nasal fibers will cross in the optic chiasm.
An eye consultant at Woolverhampton took my left eye out to show his pupil how it is done streams of tears came down my face but afterwards I have never been able to see again in my left eye since that happened, my optician told me he had damaged my retina.
Wrong information, Wrong assumptions. Nobody takes the eye out of the socket for surgery. You can't severe the Eyeball from the Optic nerve and fix it back. Hence, eye surgeries are done on the Eyeball within the socket. The only time an eye surgeon would do so it's mostly done to save the other eyeball if there's severe injury to the affected eye with high probability of an infection that can spreading to the other eye.
It was nothing to do with eye surgery my friend as you say unlikely they would have done it. He was simply demonstrating to his student pupil how to take an eyeball out. I recall lots of water running down my face never knew I could have so many tears. It was my optician who later told me that there was no reason why he should have done it and also confirmed that my retina was now damaged for life. I do not understand eyes only that I was made blind from this in my left eye and still that eye is blind ever since. He had asked me to write consent form but I didn't realize there was no need for him to take out my eye just to look in the back of it. There was no infection in either of my eyes therefore no risk of cross infection. Just went there because my eye pressure was high. But thank you for the information it is good to know these things.
Crossing of optic nerves is ok!but one mistake is that the light is coming from the left and right visual field and enter into the ratina,here has some problems.
Thank you so much for this video
Thank you so much sir🤩
minor correction :its hemianopisia not anopia
Thank you for your awesome work
I'm so glad for that.
Thanks a lot 😊🖤
Super doctor 🥼 ✨good job &Thanks 🙏🏻
I'm here for my Health Assessment course for Nurse Practitioner :D
Thanks so much!
The link between retina and visual field is incorrect. It does not take into account the optics of the eye. The outgoing rays must cross in the eye nodal point and they don't.