Ophthalmology - Retinoscopy (Part 2/2)

[@reetk8442]

teaching is an art and u have mastered it!

[@kundankumarchaudhary4768]

Only video on the net that boosts you with the confidence that you can also do it.
Thanks sir for uploading such great educational content so that it reaches to all who need it.👍

[@otissumnerbrown]

Excellent, clear, and friendly. Could not be better. Thanks Tim!

[@drwriddhimanchattopadhyay2701]

Sir, a Hugh respect to you for how easily you made us understood such difficult thing.

[@carrieforrester7023]

This is a fabulous lecture - thank you! I realized that I have been making things much too complicated for myself! Can't wait to return to work on Monday and try these techniques!

[@medicogivemered9221]

from where did this 45 degree come??

[@chuckfriebe843]

@@medicogivemered9221 because the angle of the with motion is 1/2 the distance between 90° and 180° which is what you always start with. If there is a phoropter present then check the angle compared to the phoropter.

[@palaknaik95]

This is an outstanding lecture! You made the whole topic so understandable! Kudos to the teaching skills👏🏻

[@azarpathan421]

You are a optramitist

[@anandarora2456]

Tim Root is absolutely amazing. God sent.

[@dikshyabohara2960]

This makes retinoscopy practice so easy. Thank you for this

[@saudimemon]

I can't thank you enough sir! Such a simple method for some thing, which was making think I had done a mistake by choosing Ophthalmology. :)

[@sirajoe7482]

Uff i am highly impressed. It was such a simplified version yet so helpful. Thank you sir. I am going through all your videos to add up my knowledge. Love :)

[@gayatripawar7194]

So wonderfully explained! The whole Retinoscopy seems so easy now!
Thank you Sir! 🙏🏼

[@hifabiola]

you are my favorite teacher ever! thank you so much for all of your videos.
please keep doing what you do

[@medicogivemered9221]

from where did dis 45 degree come???

[@SuperAliahad]

it is very helpful of 3rd world country like Bangladesh my fist year i always see this video clip & more Practice see more patient I know every thing...thanks Ahad -optometrist Bangladesh...

[@DocAsh28]

You're correct. The eye always accomodates if the ciliary muscles are not paralysed. That is why we do retinoscopy under cycloplegia- by using either 1% atropine eye ointment or 2% homatropine eye drops.

[@kanishkpatil7270]

Your way of teaching is beautiful!!! I understood the concept very well!! Thank you for your efforts!!

[@sarikamore8807]

I have one question regarding the cylinder power. You have already given example i.e first meridian neutral with -3.00*90and second meridian neutral with -1.00*180 so we write it as -3.00/+2.00*90 and then subtract the working distance -1.50D from spherical power .then it will be -4.50/+2.00*90 ..so my question is why cylinder is +2.00 why not -2.00

[@mohamadreza6934]

I'm a med student, you saved my career doc.

[@turquoise1162]

In the UK with use of -ve cylinder lenses, I reckon we then say that the movement must be AGAINST in all meridians as the first step, instead of the suggested 'with'.
By doing so, one meridian will be slightly against, and one very against.
The slight against will be neutralised first, leaving an against movement in the other meridian. Since against requires a negative lens, a negative cyl can be used.

[@chuckfriebe843]

Correct, but for most people the concept of 'with' is easier to grasp.

[@jonasupphagen]

Very good video. But how do you do when you work with -cylinder insted of +cylinder like we do in sweden?

[@chat202122]

Thank you so very much!!!! This was holding me back from my COT test!!! You are a gracious human being and a life saver!! If you were local I would bring you my famous Sopapilla Cheesecake ;). God bless you, Sir!

[@sunshinecasey]

Great lecture!!!! I work for a large ophthalmology practice, however, since we do have O.Ds in our practice as well, we work in minus cyl. I'm assuming that after you acquire the correction for the patient, then subtract working distance, I would have to do the additional step of transposing the Rx? Is there any quicker way to do this?

[@Mrnat2531]

you're one of the best teacher that I've ever had 👍👍

[@sohailasghar8471]

U just made it look so simple and professional

[@prathameshjain3814]

Thank u so much sir ! Keep uploading videos. Lots of luv n respect from India

[@VishwasKumarAnand]

simple yet beautiful lecture!!! very helpful. Thanks

[@t_singh7074]

Great work!
Really helpful, finally retinoscopy is no more tough!

[@DocAsh28]

These are fantastic videos- simple, easy to understand and creative. I have a request. Could you make a video of neuro-ophthalmology specifically dealing with pupillary reflexes and their related abnormalities? Meanwhile, thank you for your wonderful contribution.

[@MrSquamous]

At 11.36 it's meant : plano sphere, +1.50 cylinder at 180 not +3 like the other examples that you have mentioned we subtract the working power distance only from the sphere ?

[@chuckfriebe843]

Yes. Working power is always subtracted from the sphere.

[@kalimuthusankarapandi6884]

Super sir.Your a archite

[@durandkhadka8449]

thankyou so much for the best video on retinoscopy

[@gymyhgffh4809]

When I use stech retinascope ..use width light from it on eyes for discover myopia and used the narrow light for discover astigmatism with red reflx

[@riddhisundarsamanta]

awwsome concept sir...... thank you very much...... now retinoscopy become very easy....

[@ngtuckchun8459]

the lecture is just amazing, couldn't have done it better. really good job

[@keshav5651]

Hi , it was a great presentation , however I had a doubt about the writing of the prescription regarding the astigmatic error
We've been taught to write DS and DC separately and deduct the distance error from both and writr the angle post DC to define the axis of tilt, but in the video you mention writing the powers together subtracting DS and DC and subtracting Distance error only from DS
; what is the latest rule (if there is ) regarding this ?

[@AliNaz43]

I have noticed you have used different direction for sphere in each example, my question is for sphere when do you consider it y axis and when x axis

[@MrJiteshsoni]

usually the lower values in diopteric power is preferred as sphere. But you can choose any one as sphere. at the end you can transpose the values if you want minus cylinder lenses, as making minus cylinder lens is easy compared to plus cylinder lens.

[@PadrinoFederico]

this is great, thanks, i would never understood anything about that without this video

[@ShabbaRanksMF]

These vids are old now but were so well done.

[@jenniferhsiehod]

Best lecture on Ret ever! Thank you!

[@optica1218]

Congratulations !!!! you are very very good and a great help I only wish i could have had a teacher like you!!!

[@arielbuenaventura5771]

thanks for the lecture it help recall knowledge God bless and hope you continue to reach out people. its my pleasure to be one who benifit for it. good luck

[@enriqueh9354]

Great video, finally i got this skill

[@helensylvia9454]

Thanks so much🙌🙌🙌 your explanation is very simple and easy 👌👌👌you're a great Teacher

[@vinayneasthamreddy4526]

Making things so easy
Lecture is amazing

[@kalimuthusankarapandi6884]

Sir please make a RAF ruler accommodation and convergence test video sir please sir. I can't understand that sir

[@alibahari8480]

Wow you are the king of teaching

[@sashagenis]

Great explanation!!! Thank You Very Much!!!
I bet that you are a very good doctor.

[@drabbas86]

Thank u very much, the most useful refraction seminar ever

[@pranavangood]

great sir ......u nailed it........u are master in teaching...

[@vivekprakash1883]

Outstanding lecture

[@nav1891]

That was an awesum lesson,all doubts about astigmatism cleared out after watching this.would really appreciate if a lesson for jacksons cross cylinder test is uploaded

[@eminent8912]

Sir.. greetings from Kerala.. your videos are of immense help.. but may I ask a doubt.. +1 at 90 means there’s +1 at 90 degrees and axis is 180 right?

[@omershaikh6792]

How do we address a simple myopic astigmatism
Coz with your technique even simple myopic astigmatism will have minus sphere and plus cylinder
Please can you explain

[@julianrudert7779]

Really good! Probably no one will see this comment, but i have a question: how do i write the prescription if the astigmatism is not at 90 degrees to ewch other? Or is the light in pracitce always 90 degrees to each other?

[@michaelnonghuloo9109]

thanks ur a great teacher.

[@divyaurs5483]

hello from india, thank you sir

[@mahfa7513]

This is a great one thanks thanks for you spend this time to do this video.

[@cagethepepper]

This will help me a lot next week! THANKS!

[@drnawarjaneye]

Nicely explained

[@nehakalra2904]

you are favourite teacher .....wanna meet you in real to clear my doubt....

[@pioustawiahamoako5537]

Please can u show/ tell how a doctor who's blind in one eye can perform retinoscopy?

[@ragaviraja3673]

This video is very much useful for me.😊😊😊😊😊 thank you.

[@alim545]

thank you so much, loved the lecture , Now my fear of retinoscopy is gone.thank you

[@silverlynuzoka2184]

Beautiful
You have mastered it

[@prathameshkhobragade8760]

Sir, want more videos from you, you teach really good!

[@connelovelobitana8550]

very good lecture

[@aishamohamed2441]

Thanks a lot
Now the retinoscopy became easier

[@walana6821]

Thank you for this great explanation
Please make more lectures

[@mohamedsalah-ng1bm]

he use plus cylinder retinoscopy which mean he correct least plus or high minus merdian first ( always start with with ) and consider it sphere then correct 2nd merdian which more plus or less minus by subtract 2 power but the sign should be postive even if mathamatic is negative so it is called plus cylinderl retinoscopy

[@coldcoffeeandcake-7511]

Excellent. Thank you from the UK

[@muthuswamykannan912]

I am from India ...we subtract the working distance from either axis and then prescibe glasses..in ur lecture u prescribe and detect working distance from spherical power only...I am confused

[@sanpras1647]

VERY HEPLP FUL TO UNDERSTAND RETINOSCOPY

[@swapankumarmallick3468]

Sir, Retinoscopy The result that came out is how to write the final result in the prescription?

[@BlakRTist]

Brilliant!!!

[@iraqiman308]

great.. thanx alot.. but i noted that cylender power always plus even when both results are negative..?

[@hepaticapropria]

+Labeeb Ayad I was thinking about it and I concluded that is because the cylinder is the 'distance' between those two numbers... for exemple: -3,00 and +2,00: the distance between them is 5 (minute 7:25 on the video), so the cylinder is 5,00. I am not sure if I am right though! kkkkk

[@doccastro]

Labeeb Ayad your talking about here ABSOLUTE VALUES that is the difference between 2 numbers without regard to its sign

[@dm-jl9wk]

thank you so much for teaching us this very useful and fabulous method. it's matter me lot. can you suggest me the which light i have to take for this examination? because i don't know exactly.

[@yogendrakharel5971]

what happens when we add cycloplegic drops like atropin and hematropin?. This video is dry retinoscopy. Can you please make the video of wet retinoscopy where we add cycloplegic drops?

[@Like-sub-d2b]

Why you substract (-2 from -3 = +2 ) how come ??
Please explain this again

[@marysims2130]

very great video.good job doc! thank you very much for sharing this video.

[@midrarullah2031]

sir it was really helpful .thank you for the great work

[@123havanlinh123]

Dr.Timothy Root: why does +2 at 180 and +3 at 90= +2 +1 at 90 ???
I think it must be +2 +1 at 180 (follow the cross optical)

[@marandanorton1866]

Did you get an answer regarding this? I had the same question. If working in + cyl why is i not the most minus used with cooresponding axis. I.e. -3.00 for horizontal meridan and -1.00 for vertical meridan. Provided answer was -3.00 + 2.00 x 090 (prior to adjusting for distance). Why is it not -3.00 + 2.00 x 180 (prior to adjusting for distance)?

[@gaurangpatel2605]

According to transposition it is in double cylinder form. so we always do cross the axis

[@spitfire3280]

I see the light!

[@YaniesDiary]

thankyouu sir for this lesson! Really helpful for students like me

[@ukaszhutnik3286]

Very helpfull, thx very much. Should you perform retinoscopy only in cycloplegic pts??

[@kaminisakore2545]

Thank you so much 😊

[@haneenalhussainy2191]

Well done 🌹

[@aswanisidharthan3431]

Thank you so much sir..

[@Medics321]

What about cycloplegic deduction (tropicamide)

[@mohammadiqbalhossain2797]

Thanks For Important Lacture.

[@shakebaamiri7531]

I'm confused about 90 and 180 degrees . Can anyone help me out

[@ravishmgm]

thanks sir..for clearing the concepts

[@VijaySingh-dy2sz]

Thank you so much sir ❤

[@prashantgupta5179]

Thanks sir....
Your explanations are awesume...
Make more vedioes

[@harsimrankaur1815]

Great work sir

[@bharathkottage5054]

This was very helpful, thanks a lot!

[@aviy93]

Wouldn't leaving the patient hyperopic during retinoscopy (leaving with motion) leave room for them to accommodate? (Assuming you aren't cyclopleging everybody before this.

[@TimRoot-dotcom]

With retinoscopy, we want to get their full prescription so we know what it is ... so we always cycloplege/dilate prior to retinoscopy. As far as treatment ... everyone has different opinions. However, if I put a child in glasses I prefer to treat ALL of their hyperopia. Children have amazing ability to accommodate, so there is a tendency to "over-minus" them during refraction/retinoscopy and leave them with some (sometimes lots) of leftover hyperopia. I don't see any health benefit to this and it might give them some strain with reading. There exceptions to every rule, however.

[@majdimeskini9749]

+Tim Root
min 9:41 -3.00 +2.00 at 30

[@majdimeskini9749]

+majdi meskini
sorry at 120

[@carddealer1214]

Yeah it's better to start against and then use (-) cyl for adults. Why use meds when it's not necessary! He just cyclos everyone because he gets confused a lot. But he's right, children are tricky because if they look at you it's over, so unless they have a metal disability use cyclo.

[@drlozano_eyecenter]

The best lecture!!!!
Gracias.

[@pantit4427]

"At" the same meaning as "axis",right?

[@umeshrattra3583]

hlo sir,i am happy with your lecture but i have 2 qustn 1.is that if patient using -3.75dsph/+4.25dcyl@175 suppose if this no. is not availeble in market what we can do or 2nd qustn is that if the power is neutralize at 1.75dsphwhat will happen

[@prashantbhatkar]

Amazing lecture 🙌👌👌

[@sanchsai4431]

After two extensive lectures , I was still confused about the concept behind retinoscopy..this just helped me with less than half the time i spent before.. thankyou for sharing your lecture, sir