Our Other Websites:




 

Retinoscopy Lecture (Video)

This video demonstrates how to perform loose-lens retinoscopy from start-to-finish. I’ve created a simple animatronic model to illustrate the technique. Normally, this is a hard technique to learn, but I think you’ll find this explanation pretty awesome … at least, if you need to learn this material!


length: 24:37 minutes


Subscribe to our iTunes Podcast
Search iTunes for "ophthobook"

Retinoscopy.m4v (195 MB)

 

SCREEN SHOTS FROM THIS VIDEO LECTURE:
(comments below)


Three Steps to Retinoscopy

1. Start with WITH motion
You need to the retina reflection to be “with” in all directions. If you see “against” motion in the beginning, you might need to hold up a -2.00, -4.00, or even a -10.00 lens in front of the eyes to get that “with” motion. Only then can you proceed without getting confused!!!

2. ADD power to neutralize reflex
Slowly add more power (plus power) until you neutralize the red-reflex. If you see “against” motion, you’ve gone too far. If the patient has astigmatism, you may get different powers for each axis … don’t worry. Just set the lenses aside so you can calculate the prescription later. Remember: the sphere power is your first lens, the cylinder power is the difference between the lenses. The axis is the angle your light beam ends up at (see example below)

3. SUBTRACT working distance at end
The last step is to subtract -1.50 from the sphere.


When the image is focused behind the retina, you see "with motion" as the reflection bounces off the retina.


When you use the perfect lens power, the reflection will be bright.


You add power until you neutralize the reflex. If you use too much power, like here, you see a "see-saw" movement of the light reflex. This is called "against" motion.


You subtract a working distance to compensate for your arm-length. For most people this is -1.50


The Final Prescription: -2.50 + 5.00 at 045



32 Comments



Nice vid., though I wish there were just a bit of discussion of what “working-distance” is all about (on the other hand, maybe that would just [needlessly] complicate this particular presentation).



Comment by I Am Name — November 3, 2010



I have to disgree about step 1 “srart with with motion” kids specealy hyperope tend to do accomodation during the retinoscopy test therfore it is better start with againts motion to make sure that the patient dosn’t be over corrected by the end of the retinoscopy test
well as u might guess I’M an optometrist from israel
thank u for the lactures



Comment by eyal — November 29, 2010



Editor: Agree to disagree. I still think its better to “start with with” as demonstrated in this video. All children have cycloplegic (dilated) refractions when performing retinoscopy to avoid the accomodation problem.

Also, I could argue that your method of “starting with against” has a tendancy to “over minus” them at the end if they have any residual accomodation working.

Optometrists (like yourself) like to work in minus, while ophthalmologists (like myself) like to work in plus. Its all a matter of preference, of course.



Comment by admin — December 13, 2010



i want to ask about cylinder lenses ,when we use it? in your examples the patient have astigmatism but you used spher lenses only ,why,,



Comment by wala' — December 21, 2010



Boa Tarde!
achei este video muito bom e gostaria de saber como adquiri-lo em português?
Att.
Marcos



Comment by Marcos — January 3, 2011



very nice and prepare such type of other lectures



Comment by NAEEM — May 26, 2011



thank u 4 your lectures. could u please also prepare lectures for doing sphero-cylindrical retinoscopy as well as how to prescibe prism correction. it would be much appreciated by many ophthalmology residents like myself.



Comment by will — July 3, 2011



A very wonderful video. It made retinoscopy understandable and not scary. Ready to try it out now!!



Comment by sam — July 12, 2011



very good lecture. v soni



Comment by v soni — August 10, 2011



very nice video for retinoscopy



Comment by manikandan — October 27, 2011



wonderful,really very helpful , thnx



Comment by soufiane — November 23, 2011



hiiiiiiiiiiiiiiiiii



Comment by imran pasha — December 13, 2011



wonderful,really very helpful , thnx;;;;;;;;;;;;



Comment by imran pasha — December 13, 2011



You are a didactic genius Dr. Root



Comment by Dr. WM Gerber — December 13, 2011



You are a didactic genius Dr Root



Comment by Dr. WM Gerber — December 13, 2011



excellant video…but should n’t we have to susbtract the value for cycloplegic we use…please let me know at my email.



Comment by dr pramod — January 31, 2012



I am very happy to see these the videos,but i couldnot understand that how you referact the stigmatisam or how you use the cylindrical lense.



Comment by tajammal hussain — February 6, 2012



vvery good vedio, but, could you pls explaain me the technique of myopic astiggmatism, eg -2,-1,180, +1, -1, 180….



Comment by Liyau — February 9, 2012



very good vedio. I am student optometry. do you can help me at search about miyopia



Comment by azad — February 23, 2012



its awesome..thank you so much..it was a great help..:)



Comment by megha — February 29, 2012



hello doctor,

Greetings from India. Thanks for the exhaustive explanation. very easy to understand ‘FINALLY’ .i will be looking forward to see many of your videos and lectures.
Thank you



Comment by Dr.Venkatesh — March 1, 2012



hello..i have questions:
how the distance between instrument and patient’s eye?
what object seen by patient? & how the distance?
the the last one how if i want to use minus cylinder, any different method?
thanks



Comment by me — June 3, 2012



excellent lecture i am passing on this site to my fellow techs. I have switched from a + cyl phoropter to – cyl, how do i find the astigmatic power now?

thank you

Rodney in Boston



Comment by rodney salvador — September 19, 2012



Thank you for this lectures>>>iwant from you to increased your
vedio about astigmatism.finally thank you.



Comment by mohmmade — December 6, 2012



非常感谢您的视频 所谓的工作距离就是眼距、就例如近视的患者 度数不够用的时候 把眼镜尽量靠近眼睛 看东西会清晰很多



Comment by 郭皓正 — March 12, 2013



Excellent video as always. I don’t think I’ve found a better ret video that describes spheres only. Bravo as usual!



Comment by david spence — April 21, 2013



It was a really educational video. I really got a better knowledge at retinascopy. Thank you so much.



Comment by Prabhamali — July 17, 2013



in case of kc how yo see



Comment by Thoufeer .KP — September 28, 2013



very easy and understandble



Comment by Nematullah Sial — September 29, 2013



excellent vidéo…

juste i want to ask you , how do the transposition ?

thanks…



Comment by aras — October 8, 2013



Their vidz help me a lot for understanding many things obout ohpthalmology a speciallity that soon i want to doit.. thanks ..greeting from panama!!!



Comment by Dr· Carlos Guerra — October 15, 2013



very nice video…thank you



Comment by elshafie kamal — February 12, 2014




Leave a comment

Your Comment:


 
Copyright Root Eye Network Inc., All Rights Reserved