The above retinoscopy video is good for beginners. First the user has to develop orientation to focus light on eye. First check whether ur using plano or concave mirror, because the shadow movement in concave mirror is opposite to plano mirror. The glass power can be increased by 0.50d. till get reversal of movement. The speed of shadow movement, brightness of shadow gives an idea of refractive power. Slower the movement and dull shadow indicate high refractive power. One can do streak retinoscopy with spherical only in both axis by rotating th knob. Once u reach neutralization in one meridian, do retinoscopy in other meridian. The other easy method of streak retinoscopy is doing refraction with high power glass than the actual power and then reduce power to get reversal of movement. In oblique astigmatism, rotate the knob till the streak and shadow come parallel.
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Stay with us and share with your friends. Don't forget to download our app "Optometry Notes & MCQs". It's available in Google Play Store. Thank You, Samir Sutradhar.
Awesome described as in Elkington book just in four minutes four pages covered here that too with good comprehensive simple presentation and animation awesome I really liked it though we never used this technique or trial frames or cylinders we always used spheres in each meridian and then used to correct it for working and cycloplegic correction you corrected for working distance but then you didn't tell to correct it for cycloplegic drug correction also here you neutralised the movement with the sphere in one axis and with the cylinder at ninety degree later on keeping sphere intact, it's a normal uncomplicated example ! Sphere can be neutralised in any one meridian horizontal or vertical first then perpendicular meridian is used to it to neautralise that with the cylinder but you didn't correct here for a drug used for cycloplegia but anyways a helpful video for better clear understanding ! I hate my post graduate college such a chhapri cheap faalatu college didn't teach us things fast and properly why because they themselves don't know many things plus their ego arrogance biased attitude is at highest level ! Everytime I read something i remember my asshole falatu cheap pg college how pathetic it was !
@@PiyaChoudhari There are 3 techniques of Retinoscopy. I have prepared separate videos for each. You can go to our channel and check Retinoscopy Playlist. Your feedback really motivated me, Thank you...
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Sir, during final spectacle power we should algebric summation of spherical power from working distance, in this case +1.5-2.0, isn’t it.Please clear it.
I will request watch this video again carefully. We have already given working distance power(+1.50D). Then we neutralized one meridian with Spherical lens and other with cylinder lens. And in final prescription we didn't count the working distance power. So no need to subtract working distance from spherical power.... Don't forget to try Android App "Optometry Notes and MCQs". Thank you, Samir Sutradhar.
▪️Stay with us and share with your friends. ▪️Don't forget to download our App "Optometry Notes and MCQs ". It's available in Play Store. Thank you, Samir Sutradhar.
In scissor reflex accuracy will be less keep it in mind. To increase the accuracy you can use pilocarpine to constrict the pupil. Better to give cylinder in Minus (against movement) form as lenses are made up with minus cylinder. Thank you, Samir Sutradhar.
Sir in this video our retinoscope streat for correction of cylinder is 90 degree .. We put cylinder at 180 axis or at 90 axis please guide me. and in final prescriptiom you write -2 00/-1.00*90 while our streat is 90 i think here axis should be 180 in prescription
First of all, You are confusing with retinoscopic cross with retinoscopic neutralization. During retinoscopy only remember about axis don't try to think where the power is... When the reflex becomes parallel with streak we call it axis and to neutralize this axis remember you have to place the axis of trial lens where streak and relfex is parallel, power is already distributed 90 apart from the axis in the trial lens. You don't need to change the axis by 90 again. If still you are confused go through the optics of cylinder lens. Or start doing retinoscopy with this video (with these 3 simple steps) by the time you will understand the mechanism. Thank you, Samir Sutradhar
When the retinoscope streak it vertically so we neutralized the horizontal meridian. Exp when streak of retino it 90 meridian and then we swipe retino right and left direction mean horizontal movements so we mention power in horizontal meridian which we neutralized
@@deepthink6500 Watch updated video here with optical cross to understand more easily: ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-62Rtok8YcPM.html
Sure, I will try in upcoming videos. ▪️Stay with us and share with your friends. ▪️Don't forget to download our App "Optometry Notes and MCQs ". It's available in Play Store. Thank you, Samir Sutradhar.
Please watch the video few more times... If one meridian is 45 other meridian will be 135. You can neutralize one meridian with Spherical trial lens(Suppose 135) and other meridian with cylinder trial lens (45). Procedure is same but meridian will change... Thank you, Samir Sutradhar.
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Watch the video again... We given working distance at first and didn't calculate in final Refraction. In this method, you need to put working distance power at the beginning (Separate trial lens) and forget throughout the process.
I have a question. In placing the lens to get the cylinder, what lens is used, is it the sphere trial lens or the cylinder trial lens itself? Thank you
In this Technique, we use a cylinder trial lens to identify cylinder power. Watch the updated video of this technique: ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-62Rtok8YcPM.htmlsi=abClt8Pvyyj2tLtm
Stay with us and share with your friends. Don't forget to download our app "Optometry Notes & MCQs". It's available in Google Play Store. Thank You, Samir Sutradhar.
Check Updated version of this Video: ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-62Rtok8YcPM.html Stay with us and share with your friends. Don't forget to download our app "Optometry Notes & MCQs". It's available in Google Play Store. Thank You, Samir Sutradhar.
▪️Stay with us and share with your friends. ▪️Don't forget to download our App "Optometry Notes and MCQs ". It's available in Play Store. Thank you, Samir Sutradhar.
In this technique you are placing cyl at 90 and also in final prescription at 90 but in 2 cylinder technique while neutralizing 90 meridian you are writing power at 180 .why plz explain
You can also do Optical Cross like "2 cylinder method" then convert into Sphero-Cylinder format. The result will be same. I will suggest you to watch below 2 videos. These video will clear your doubts. If you still have any doubts then you can reply back.. ✓Watch extended version of this Video here: ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-62Rtok8YcPM.htmlsi=HdeD4Hr60gbJ3J8A ✓Watch optical cross video here: ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-TBOReXX0JCU.htmlsi=MnyV2lt3hbjeAr7X
Stay with us and share with your friends. Don't forget to download our app "Optometry Notes & MCQs". It's available in Google Play Store. Thank You, Samir Sutradhar.
They are different instruments. Ophthalmoscope is used to examine interior of the eyes where Retinoscope is used to identify Refractive Error of the eye.
You can neutralize any meridian with cyl trial lens.. In this technique, if you choose horizontal as Spherical meridian then you can neutralize horizontal meridian with a Spherical Trial lens and vertical meridian with a cyl trial lens. Please watch this video few times then practice with Retinoscopy Simulator online.... 📌Watch complete playlist about retinoscopy: ru-vid.com/group/PLslkRTVi8_xfgkm8qmPLa0xRex7-3_C31
We have plan to launch a App for online classes, MCQ and notes... Drop your email here. We will inform you when we will launch the app. Thank you, Samir Sutradhar.
Plzzz make video on peripherals and central glows.while doing i get very confused wether i should look at orange or light red glow coming frm corners ..Or central glow.. Very confusing while doing practical 😣😣😣😢😢🤧
Thank you for your suggestion. You should follow only central reflex. Because we see through our optical zone which is 3-5mm. In some condition like Keratococus it's advised to do refraction after using miotics. Thank you, Samir Sutradhar.
@@unknowndomain6357 Depends how far away you are from the refractive error. If you are extremely far off, say 5D or more, it will be Dull, wide and slow. As you add power in the appropriate direction, it should brighten up and the reflex will narrow. This can help you appreciate the axis (and cyl if that is required). Then you can continue adding power until the reflex "widens" and becomes bright without movement/neutral.
@@unknowndomain6357 you have to see both the thickness and brightness of the reflex. Wide and dull indicates higher power. Narrow and bright indicate small power
@@unknowndomain6357 Hard to explain but it sort of goes from not really seeing much of a reflex (dull), to seeing a more distinct beam (approaching the appropriate power), until it is finally neutralized and theoretically the beam should become a nice uniform glow... I always see it as a beam collapsing in on itself until I see the orange backdrop filling the pupil? Retinoscopy has become more muscle memory than really sweating over the beam I'm observing unless I think I'm dealing with an accommodative spasm (variable reflex) and/or non verbal patient where I need to rely almost solely upon my Ret.
Stay with us and share with your friends. Don't forget to download our app "Optometry Notes & MCQs". It's available in Google Play Store. Thank You, Samir Sutradhar.
