This is the best and most comprehensive basic explanation of fundoscopy I've ever found! Sometimes, the underlying mechanism is quite the challenge, but here, the image & animation made it easy to tackle. There is also no information overload. And I like how you explain things so clearly ma'am!😊
I always get blurry image from DO but now I know how to use compensatory lens from your video and will try it. Thank you ma’am for discussing such basic yet important topic.
I liked most of your video a lot but found I did notice a small error there at the end when you covered the “FILTER” switch 31:00 Overwork & fatigue, deadlines, distractions and the like can get in the way for us all - you might want to do that little bit again….? The cross hatched option on the right of the Welch Allyn filter switch is the diffuser to reduce and restrict the reflection of light from the cornea (when problematic). The non-red one on the opposite side of the switch is as you describe and the central option on the switch is open/blank afaik. As you said earlier [I think] the ‘Grid eccentric fixation’ tool is on the aperture wheel and not the filter switch👍. I hope this is of some help.
That is soo nice of you! You are correct 💯 The last one is actually a linear polarising filter and the purpose is to reduce the corneal reflection This beam has to be directed from the edge of the pupil.. Thank you for pointing that out :)
Yes,enjoyed the video, but I was more curious about the two convex lenses system... Like why there are 2 convex lenses in the ophthalmoscope, what are their power, how much they are separated from each other etc
Thank you so much for this in-depth discussion Dr, been really struggling with this. How do you determine the ratio of the arteries to that of the veins i.e. A/V ratio, I hear the normal ratio is 2/3 but i don't really understand how that is determined?
It's a rough estimate where we compare the size of the vein and artery near the disc area of the retina. Roughly if we feel that the vein is about 1.5 times larger than the artery, we say it's 2/3. It's very subjective
The field of view you say is lesser in miopes?. That raises a few questions for me [being a physicist's son]. Firstly, when using binoculars the further away the image viewed the more of it you can see - so if the back of the eye is further away should you not see a wider field. The other query is that regardless of the depth of an eyeball does the focusing adjustments/lens diopter we select not correct that focus to the same relative spot. Such that the focal point [on the retina] is where the 2 lines will intersect and needn't be futher apart on hypermetropes as you illustrate [ie because you have selected a more convex lens]? PS No offence, just looking to learn - I'm a first principles type learner - If I can follow the logic I can always remember or work it out again later.
Mam you explain various dipter power with which we can visualize different structures of eyes .....but i try these power but got blur vision...so plzz explain ...in video you explain at 24:33 min
For beginners welch allyn or any budget friendly LED models... If you want something high end go for Keeler or heines Best would be to try out different models if possible to assess weight, comfort, and brightness. Also, ensure after-sales support and availability of spare parts at your location...
Usually the examiner wears his/her correction during the exam so it's enough to consider the refractive error of the patient. If not then a rough method is to just rotate the lenses and see where we are able to find the clear image. Another method is to find the net refractive error and use the lens accordingly..it is the algebraic sum
This is the best and most comprehensive basic explanation of fundoscopy I've ever found! Sometimes, the underlying mechanism is quite the challenge, but here, the image & animation made it easy to tackle. There is also no information overload. And I like how you explain things so clearly ma'am!😊
Thank you!!
I'm so thankful.... i have an OSPE and viva tomorrow and this was so helpful.
All the best :)
@@InsightOphthalmology thank you
I always get blurry image from DO but now I know how to use compensatory lens from your video and will try it. Thank you ma’am for discussing such basic yet important topic.
Happy to help!
With a little practice you will master it soon :)
Wonderful , informative video as usual, thank you so much
Glad you enjoyed it
Very informative video . Thank you ma’am .
My pleasure 😊
Thanks, it is a very useful and helpful video. Thanks again
You're welcome:)
thankyou mam, much needed video...
Amazing video, as always! Thank you a lot Dr. ❤
You're welcome 😊
Very informative video. Thanks a lot Dr. 🎉❤
You're welcome:)
I liked most of your video a lot but found I did notice a small error there at the end when you covered the “FILTER” switch 31:00
Overwork & fatigue, deadlines, distractions and the like can get in the way for us all - you might want to do that little bit again….?
The cross hatched option on the right of the Welch Allyn filter switch is the diffuser to reduce and restrict the reflection of light from the cornea (when problematic).
The non-red one on the opposite side of the switch is as you describe and the central option on the switch is open/blank afaik.
As you said earlier [I think] the ‘Grid eccentric fixation’ tool is on the aperture wheel and not the filter switch👍. I hope this is of some help.
That is soo nice of you!
You are correct 💯
The last one is actually a linear polarising filter and the purpose is to reduce the corneal reflection
This beam has to be directed from the edge of the pupil..
Thank you for pointing that out :)
Thank you!!
Yes,enjoyed the video, but I was more curious about the two convex lenses system... Like why there are 2 convex lenses in the ophthalmoscope, what are their power, how much they are separated from each other etc
Thank you ma'am.
Thank you so much for this in-depth discussion Dr, been really struggling with this. How do you determine the ratio of the arteries to that of the veins i.e. A/V ratio, I hear the normal ratio is 2/3 but i don't really understand how that is determined?
It's a rough estimate where we compare the size of the vein and artery near the disc area of the retina. Roughly if we feel that the vein is about 1.5 times larger than the artery, we say it's 2/3.
It's very subjective
Thanks Dr
Welcome
Mam..please upload video on recent adv..
The field of view you say is lesser in miopes?. That raises a few questions for me [being a physicist's son].
Firstly, when using binoculars the further away the image viewed the more of it you can see - so if the back of the eye is further away should you not see a wider field.
The other query is that regardless of the depth of an eyeball does the focusing adjustments/lens diopter we select not correct that focus to the same relative spot.
Such that the focal point [on the retina] is where the 2 lines will intersect and needn't be futher apart on hypermetropes as you illustrate [ie because you have selected a more convex lens]?
PS No offence, just looking to learn - I'm a first principles type learner - If I can follow the logic I can always remember or work it out again later.
Mam you explain various dipter power with which we can visualize different structures of eyes .....but i try these power but got blur vision...so plzz explain ...in video you explain at 24:33 min
Hi mam i have direct ophthalmoscope and i wanted to buy indirect ophthalmoscope for my fellowship ! Please guide me
For beginners welch allyn or any budget friendly LED models...
If you want something high end go for Keeler or heines
Best would be to try out different models if possible to assess weight, comfort, and brightness. Also, ensure after-sales support and availability of spare parts at your location...
If pt and doctor both had the different refractive erorr means,, how to adjust the lens mam?
Usually the examiner wears his/her correction during the exam so it's enough to consider the refractive error of the patient.
If not then a rough method is to just rotate the lenses and see where we are able to find the clear image.
Another method is to find the net refractive error and use the lens accordingly..it is the algebraic sum