- Видео 55
- Просмотров 78 022
Christopher Clark
США
Добавлен 4 дек 2020
An Educational channel for learning about eye care, vision and optics.
Evidence-Based Clinical Decision Making
Introduction into evidence based clinical decision making in eye care
Просмотров: 132
Видео
A little holiday rock and roll air guitar
Просмотров 349 месяцев назад
A little holiday rock and roll air guitar
Bonferroni Correction and Multiple Comparisons
Просмотров 422Год назад
Bonferroni Correction and Multiple Comparisons
Brightness Acuity Testing and Glare
Просмотров 9 тыс.2 года назад
Glare and brightness acuity testing (BAT)
Sodium Fluorescein Part II
Просмотров 2472 года назад
Sodium Fluorescein (NaFl) uses in ophthalmology and optometry
Sodium Fluorescein Dye and Staining in Eyecare Part I
Просмотров 7502 года назад
Sodium Fluorescein Dye and Staining for Optometrists and Ophthalmologists.
Javal's Rule
Просмотров 1,1 тыс.2 года назад
Javal's rule and predicting astigmatism from corneal keratometry/curvature.
Keratometry and corneal topography
Просмотров 11 тыс.2 года назад
A look at keratometry and corneal topography. Also discusses how corneal curvature causes astigmatism.
Sphere Refractive Errors
Просмотров 1912 года назад
A short video explaining sphere refractive error like myopia (farsightedness) and hyperopia (nearsightedness)
Predicting change in refractive error from visual acuities Source
Просмотров 6852 года назад
How to predict changes in refractive error, such as myopia, hyperopia and astigmatism, from visual acuity (VA).
Between Observer Variability and Cohen's Kappa Source in Ocular Research
Просмотров 1683 года назад
A video on observer variability and Cohen's Kappa for ocular, eye, vision, Ophthalmic, and Optometric research
Confounders in Ophthalmic Research
Просмотров 223 года назад
a short video on confounders in eye research
Sensitivity and Specificity
Просмотров 333 года назад
A look at sensitivity and specificity in eyecare
Confusion Matrix
Просмотров 1313 года назад
A look at the parts of a confusion matrix for optometrist, ophthalmologist and eye care
Theories of Myopia Development and Progression Source
Просмотров 1,9 тыс.3 года назад
Theories of Myopia Development and Progression Source
Ocular Disease and Refractive Error Spotlight: Retinitis Pigmentosa
Просмотров 1433 года назад
Ocular Disease and Refractive Error Spotlight: Retinitis Pigmentosa
Ocular Disease and Refractive Error Spotlight: Amblyopia
Просмотров 2313 года назад
Ocular Disease and Refractive Error Spotlight: Amblyopia
Anisometropia and aniseikonia testing
Просмотров 3,6 тыс.3 года назад
Anisometropia and aniseikonia testing
Anisometropia and Aniseikonia Treatment
Просмотров 3,4 тыс.3 года назад
Anisometropia and Aniseikonia Treatment
Ocular Disease and Refractive Error Spotlight Amblyopia
Просмотров 2333 года назад
Ocular Disease and Refractive Error Spotlight Amblyopia
Ocular Disease and Refraction Spotlight: Diabetes
Просмотров 2563 года назад
Ocular Disease and Refraction Spotlight: Diabetes
Fuchs Corneal Endothelial Dystrophy
Просмотров 2,5 тыс.3 года назад
Fuchs Corneal Endothelial Dystrophy
Starting Lens Determination for Subjective Refraction
Просмотров 1993 года назад
Starting Lens Determination for Subjective Refraction
Myopia Genetics and Environment Source
Просмотров 5623 года назад
Myopia Genetics and Environment Source
Refractive Disease Spotlight Marfan's Syndrome
Просмотров 373 года назад
Refractive Disease Spotlight Marfan's Syndrome
My left eye is a -5 and my right eye is Plano thanks to a botched cataract surgery miscalculation of the new lens. If I wear glasses I vomit in less than 10 minutes. I am contact lens intolerant and I'll get pink eye in 2 days or less. I have to lay down horizontal every 2 hours it seems or less or I will throw up. So my day is cut in half with maybe 6 hours of life. My left eye is now turning in towards my nose and I've seen it this way in a selfie.
Thank you so much, Christopher!❤ You are such a good educator. You are giving such good philosophical instryction. Your channel is a precious channel. 🎉I hope your channel become popular sooner!
How get rid of the fuchs dystropy naturally
well explained! Thank you !
Goof afternoon. Sorry I have 55 years old and I have anisometropia, to play tennis is difficult, ¿is there some solution? Many thanks!
This must be the best explanation of Fuchs ive seen on the internet yet. Many thanks for posting.
A great study. Soon, we will be helping pilots go from 20/50 to 20/20. Can you help us?
In the living eye, accommodation does not stop or relax. It is continuously adjusting based on micro blur detected at the surface of the retina.
I always verify I read letters correctly. I use test lenses to establish my refractive state. All values are objective and repeatable. Refractive status, +0.5 Diopters. Snellen, 20/20.
Impressive. Takes time!
Difficult subject. I prefer my objective measurements.
20/50 is illegal to drive in most states? What?
Thank you!! Studying for my COA and this really helped me!
Is this dye fluorescent can cure the eye Eye wound can fix ?
I have a prescription -3.00/-2.00 x90 with K readings 7.80mm @ 180 and 7.40mm @ 90 - is this WTR or ATR - I believe it is ATR
Excellent tutorial!
Concise and informative…thx
thank you for this amazing video! simple and easy to understand!
explain pretty well about WHY, not only how and what.
The last slides concerning the contact lenses are blemished and have no legible text.
0.25 Diopters. 20/60 to 20/20. About -1 Diopter. Use your own test lenses, please.
tysm
My right eye needs power +7 but my doctor gave +3 after decreasing several time.And left eye glass power is +.50. I have difficulty focusing. While I try focus or study my vision become blurry and crossed most of the time. Will you please tell me if contact lenses will solve this problem? 🙏
I'm studying to get my NCLE and this is very useful!!! I appreciate it!
I'm not a optometrist student. I have high myopia -6 on both eyes. Recently I went to hospital for biometry to know that I'm a good candidate for LASIK or not.They said that i have good corneal thickeness to go for LASIK. But they told me that my axial length was too long so it will probably leads to myopic regression after few years. From then I'm freaking out to know how much it was more than 26mm?
Please do no have any refractive surgery. Have a great Doctor fit you with RGP contact lenses and you will have fantastic vision with no worries..
I need to order this... Plz share vendor number if u have, i m in Moradabad india
What type of eye doctor would be able to resolve these issues? I go to a big box doctor and they have no idea how to fix it
A large number of optometrists are trained to deal with this issue in academic, private practice or corporate (big box) locations
You have to look around. Some doctors are trained much better than others. Never see just one of anything.
do you think axial length can be reduced as an (early) adult with hyperopic defocus? there is a internet sphere called endmyopia and also a youtube channel which also has many people reporting that they have reversed their myopia this way.
Thanks so much, excellent videos and content.
Christopher you gave a great voice. Maybe try as a book reader or narrator.
This channel is more helpful than the hundreds of office visits we've had all put together
A different of refractive state, between two normal eyes, @ 1 Diopters.
Hi Chris, This is a good idea, to verify. I do not complain.
A. Camera Eye is a complete myth. The fundamental eye, controls its refractive STATE, to its average of Accommodation. See putting a -3 Diopters, on a totally normal eye. Predict it refractive change, for the next three months. Now with the same eyes, put a +3 Diopter on them. Not, Predict their refractive state charge.
The only "visual guided growth ", comes from the Accommodation systems. Ie, all eyes are sophisticated control systems. A Truth you must totally deny. Even you apply a step function to the Accommodation system, the fundamental eye changes its REFRACTIVE STATE, accordingly. Your "Emmetropia theory ", is disconnected from objective scientific reality.
Wrong. We know in 2022 what the correct theory of myopia is.
Can you provide any references?
@@frost-health851 Medina A. The cause of myopia development and progression: Theory, evidence, and treatment. Surv Ophthalmol. 2022 Mar-Apr;67(2):488-509. doi: 10.1016/j.survophthal.2021.06.005. Epub 2021 Jun 25. PMID: 34181975. pubmed.ncbi.nlm.nih.gov/34181975/
All normal eyes, do not have "refractive errors" they have measured positive and negative refractive STATES. That is the only objective measure, a scientist can ever make.
Emmetropization, is a convenient myth. It is an out growth, of Kepler's assumptions and theory of the eye.
Now I understand astigmatism better. Thanks. 😊
I have WTR astigmatism. I see vertical (upward) lines in better focus
Thanks for your review of refraction. I now do my own refractive checking. Far more accurate than a 5 minute visit. I am not your patient, so must make certain to always verify 20/20 on my Snellen. Making certain that any refraction I have is Spherical.
if the eyeball only elongate then why farsighted people's eyeball shorten?
They don’t. Their eyeballs are born shorter than normal and as they age their hyperopia reduces due to the elongation naturally occurs while a person matures. Hyperopia doesn’t get worse, but if someone is born with a big amount of it, amblyopia might occur.
Bates's Rocking can lead to emmetropization?
Nice video! What do you think about reading glasses (for example one with two +1 sides) to prevent myopia from developing while (students) are focussing on things close to their eyes?
The eye controls the lens, as feedback, to micro blur on the surface of the retina. Check the science, please.
Correct. All fundamental eyes "emmetropizes", on their average of accommodation.
The normal eye is controlling its refractive state, to changes in its average level of accommodation. All eyes are sophisticated control systems.
Use an electronic Snellen, but keep the 50% judgment.
Not an accurate model. "Emmetropization", is wrong. No normal eye ever does it The eye never was a convenient box camera, for your analysis. All eyes control their refractive STATE, to their AVERAGE of Accommodation. All normal eyes change their refractive STATE in both directions. (See pure, un-biased scientific research for confirming. ) See: Otis Brown and Dr. Antonio Medina
I enjoyed your content a lot! I've been trying to look for RUclips video like yours that informs the topics in this RUclips video. 👍 👩⚕️Your explanation really is like the videos from Dr. Ethan. His explanations are insightful and he helped me on my midterms. He is a helpful medical student in Europe! I recommend you check his YT out and give Dr Ethan a like! 👉 #DrEthanEducation