I must confess that this is the best, most simplified and well explained lecture on this topic of astigmatism classification. I used to be confused on this but I can now answer this correctly, even in my dream. THANK YOU SO SO MUCH.
@32mrmanic12 жыл бұрын
Wow such an awesome video you really helped me to fully understand Astigmatism types & decipher the prescriptions & meanings & all I have is a simple passing interest in this but you broke it down so well I feel like an expert now. Great job. Your examples at the end are top notch by the way. Excellent video.
@sushmachowdarymandava5164 Жыл бұрын
Wow mam! The most simplified version out there. Very helpful. Thank you
@shh9800 Жыл бұрын
The best explanation that allowed me to finally be able to understand my prescription. Thank you so much.
@XxxxxsilvermistxxxxX3 жыл бұрын
Thank you, ma'am! This largely eliminates the need for a pen and paper to transpose each time to arrive at a diagnosis.
@ДалерАбдуллоев-м8к2 жыл бұрын
I find this video many time ! Thanks a lot for this and all videos. Respect. It's for us starting doctors ophthalmology elixir of the knowledge!!!♥️♥️♥️🙏
@gipsy41x Жыл бұрын
Thank you so much Ma’am for saving my time 🙌
@TJLahori2 жыл бұрын
Thanks a million for this easy to process under pressure method. I solved each of the example in the transposed form too just to confirm if the method holds true ( off course it does) and for practice. Thanks agoin.
@ophthalmologypearls2 жыл бұрын
Nice. So with all that practice you can never go wrong again. Advise you practice one or two examples once a month just to keep in touch
@JabSurgeonMet.. Жыл бұрын
@@ophthalmologypearlsmay we know how to determine mam whether it is against the rule or with the rule If the axis is other than 90 and 180 degree
@milanpatel72838 ай бұрын
Simple & easy to get till now I think no one can make astigmatism such a easy way thanks
@daveswert5568 Жыл бұрын
Thank you so much for explaining this I've been searching for an easy explanation for long and now here I am well equipped with the knowledge that you've provided.
@binteismail6444 Жыл бұрын
Best explanation so far. Thankyou Madam
@smoaz01 Жыл бұрын
if the axis are 110 or 40 then how we find the direction ?
@tamilselvan.r82627 ай бұрын
Oblique
@debjitroy37342 жыл бұрын
Thank you...for a layman like me it was good to know such brief and just
@drbjn5363 жыл бұрын
Madam pls make a video on how to do retinoscopy and also comprehend the values of retinoscopy to convert it to spectacle prescription for postgraduates
@larryponciusАй бұрын
thank you for the explanation Dr
@vinayprakash2105 ай бұрын
Most appreciable explanation ever😊😊
@Snooze_Jit.3 ай бұрын
Which lens can use in compound myopic astigmatism against the rule?
@mahenurnazim6992 Жыл бұрын
Respected mam, So grateful to you. Humphrey visual field analyzer want to know about it.
@iacopoguidi78717 ай бұрын
Great video as all of them! But I have a question: what if the axis is different than90 or 180? I was taught that axis from 0 to 30 and 150 to 180 are with the rule, 70 to 120 against the rule, and the others are oblique.
@ophthalmologypearls7 ай бұрын
Thank you! Unfortunately the guidelines for inclusion in with rule and against the rule are not freely available in the literature. At least not in a reliable source. Smolin and Thoft mentions 15 degrees on either side of the vertical and horizontal as the limits. Since this is a standard book, one can take those values
@dharanesh.ravichandran8 ай бұрын
what about the axis having numbers 170 and 160
@ranjitha_siri2 жыл бұрын
Thanks a lot Anupama mam ..the video s excellent
@ophthalmologypearls2 жыл бұрын
Thanks, though you got my name wrong :)
@mariateresapaguio7799 Жыл бұрын
Thank you so much so easy to understand the explanation 😊
@marthabonelli89062 жыл бұрын
Wow! This is the best explanation ever 👏 🙌
@ophthalmologypearls2 жыл бұрын
Thanks, glad you liked it!
@dear52724 жыл бұрын
Mam can u add video on Surgical procedures for glaucoma
@ophthalmologypearls4 жыл бұрын
Are you an undergraduate or postgraduate?
@dear52724 жыл бұрын
@@ophthalmologypearls undergraduate mam
@charmolypi11 ай бұрын
I have THREE QUESTIONS, because Google is confusing me. If I have With the rule astigmatism- is my cornea the shape of an egg rolled onto its side when viewed from the front (like looking at the longest width of a football) or and egg sitting vertical in a carton 🥚? Also, when I look at an astigmatism chart and for both eyes I see prominent on 90/270 and 60/240. What axis would be prescribed to correct this? Is it the same numbers I see on the chart or what? AND the third question. My right eye sees the above numbers on an astigmatism wheel spokes chart thing, but sometimes switches to 180/0 and 150/330 while I'm looking at it or if I blink. What is the causes for this?
@manishagrahari84442 жыл бұрын
Amazing explanation ma'am ❤️❤️
@khsvlog2317 күн бұрын
What will be if power 55 degree or 135 degeree? Which one will verticle or horizontal
@ophthalmologypearls17 күн бұрын
@khsvlog23, within 15 degrees of vertical or horizontal is considered vertical/horizontal. Others are oblique astigmatism and not considered for the above exercise. (Source: Smolin)
@khsvlog2317 күн бұрын
@ophthalmologypearls what if not the degree of astigmatism is 180/90. Like if it is 135degree. can you please explain it further. Is this rule apllied for only 180/90 degre? If not. Then what will be the rule to identify the verticle or horizonral. Thanks in advance.
@khsvlog2317 күн бұрын
If different eyes shows differnent power at different meridian. Then what will be diagnosis.
@ophthalmologypearls17 күн бұрын
@@khsvlog23 If cyl from 75 to 105, then considered as if at 90 & proceed accordingly If cyl from 165 to 15, then considered as if horizontal & proceed accordingly
@ophthalmologypearls17 күн бұрын
@@khsvlog23 Each eye is considered separately for diagnosis
@sanmedhi2 жыл бұрын
Much needed video for pg .
@mohammadibrahim34132 ай бұрын
5:48 second. Simple with the rule Hypermetropic astigmatism.
@ophthalmologypearls2 ай бұрын
@@mohammadibrahim3413 no it is myopic please transcribe and you will realise
@ophthalmologypearls2 ай бұрын
@@mohammadibrahim3413 it is against the rule astigmatism please watch the video again
@prashantkuril.66982 жыл бұрын
What is compound number?
@SomaraniMahato-eo2lj5 ай бұрын
But how to understand astigmatism if the axis is not 90 or 180. Like 70 or 130 etc...
@ophthalmologypearls5 ай бұрын
@@SomaraniMahato-eo2lj the answer is given as a reply to the other comments on this video please see
@sunithareddym3 ай бұрын
How to identify regular irregular astigmatism
@ophthalmologypearls3 ай бұрын
@@sunithareddym what is regular irregular astigmatism?
@sunithareddym3 ай бұрын
@@ophthalmologypearls some one said regular astigmatism means normal irregular means but birth defects or surgeries or some thing like that
@ophthalmologypearls3 ай бұрын
There is regular astigmatism and there is irregular astigmatism. There is no such thing as regular irregular
@discoversoil979 Жыл бұрын
It was very helpful... Thank you
@sadiaislam17 Жыл бұрын
If the axis Meridian isn’t 90 or 180 then how can we find the rule of astigmatism..wheather is it WTR or ATR?
@ophthalmologypearls Жыл бұрын
Different books give different axes that qualify to be called oblique astigmatism. Smolin & Thoft mentions outside of 15 degrees on either side of the horizontal / vertical meridian is considered oblique astigmatism; other books mention 30 degrees. In the examination, the examiner only wants to know if you can identify based on the numbers and signs, & will not be overly concerned about oblique astigmatism
@sadiaislam17 Жыл бұрын
@@ophthalmologypearls thanks a lot.
@jesnuannmathew2 жыл бұрын
Thank you so much mam it was very help full. Nice teaching 🥰🥰
@dr.zeeshanhameed186810 ай бұрын
Shouldn't example 8 be mixed hypermetropic WTR Astigmatism????? btw Thank you so much for video
@ophthalmologypearls10 ай бұрын
In example 8, since the signs of both sphere and the cylinder are plus, this is a compound hyperopic astigmatism. There is no such thing as a mixed hyperopic astigmatism.
@dr.zeeshanhameed186810 ай бұрын
@@ophthalmologypearls oh thank you thank you, ma'am
@areeba3213 ай бұрын
Sign are different then how its compound mam???
@ophthalmologypearls3 ай бұрын
@@areeba321 watch the video and you will understand
@areeba3213 ай бұрын
@@ophthalmologypearls arent sign same in compound one ? I cant understand
@mahsasaadat43393 ай бұрын
@@areeba321That was my question too. I think when numbers and signs are same she says compound. When numbers are same with different signs she says simple! But in the video, she teaches that when we have different signs and sph is bigger it's also compound. Confusing!
@ophthalmologypearls3 ай бұрын
If you are confused, transpose and it will become clear
@areeba3213 ай бұрын
@@ophthalmologypearls yes i transposed and its easy for me now but i use with the rulae and against the rule trick ots very helpful . Thnx alot
@profbakrawy Жыл бұрын
perfect, thank you.
@badrikokaia4603 Жыл бұрын
What if your axis is like 88° or 117° is that oblique astigmatism?
@ophthalmologypearls Жыл бұрын
Different books give different axes that qualify to be called oblique astigmatism. Smolin & Thoft mentions outside of 15° on either side of the horizontal / vertical meridian is considered oblique astigmatism; other books mention 30°. In the examination, the examiner only wants to know if you can identify based on the numbers and signs, & will not be overly concerned about oblique astigmatism
@rutvishah84357 ай бұрын
Thank you so muchh, this is very helpful
@srihari2564 жыл бұрын
Mam can you do a video on disc changes in glaucoma . thank you
@ophthalmologypearls4 жыл бұрын
Yes, I just need to know whether you are an undergraduate or a postgraduate
@srihari2564 жыл бұрын
@@ophthalmologypearls Post graduate madam
@rehanaabidi4339 Жыл бұрын
@@ophthalmologypearls j
@vasileaugustincalistru1842 Жыл бұрын
Thank you so much!
@reethumoljishnu67132 жыл бұрын
Mam if the axis is less than 90 then it is against or with the rule
@ophthalmologypearls2 жыл бұрын
There is no hard & fast number for this. Each reference gives a different number (from 10-30 degrees). So as a general guide - within 30 degrees of the vertical meridian can be considered as if the axis is at 90, & within 30 degrees of the horizontal meridian, the axis can be considered as if the axis is at 180
@BB_girl-ce1ye7 ай бұрын
Very helpful thanks ❤
@Nick2014B2 жыл бұрын
What does with the rule astigmatism mean
@ophthalmologypearls2 жыл бұрын
With-the-rule astigmatism is astigmatism where the vertical meridian is more myopic (horizontal meridian more hypermetropic) & against-the-rule astigmatism is astigmatism where the horizontal meridian is more myopic (vertical meridian more hypermetropic)
@nusrathali4452 Жыл бұрын
Excellent ma'am 👏👏
@SomaraniMahato-eo2lj5 ай бұрын
Very helpful ma'am 😊
@jesnuannmathew2 жыл бұрын
Mam can you please explain transpositions also
@ophthalmologypearls2 жыл бұрын
Here is the video kzbin.info/www/bejne/iKPappaPn6xlj7M
@dharshan51454 жыл бұрын
Mam wat if the axis is say eg.140 , 30 deg
@ophthalmologypearls4 жыл бұрын
All the standard books describing optics & refractive errors simply mention that if the axis is at or near 90 or 180, it is with / against the rule and others are oblique astigmatism. Most books that do give a definitive value are not standard books that one can quote. I found these lines which I am quoting from Smolin & Thoft (The Cornea, SCIENTIFIC FOUNDATIONS AND CLINICAL PRACTICE) - "In with- the- rule astigmatism, the steepest meridian is within plus or minus 15 degrees of being vertical " and "In against- the- rule astigmatism, the steepest meridian is within plus or minus15 degrees of being horizontal." Since Smolin & Thoft is a standard book for cornea, we can take this value.
@tamilselvan.r82627 ай бұрын
+1.00DS/-1.00DS ×90 .IN VIDEO 1.16 SAYS simple astigmatism, but in another video says it is mixed astigmatism,please clarify mam
@ophthalmologypearls7 ай бұрын
@tamilselvan.r8262 This is without a doubt simple hyperopic astigmatism. Transpose & you will realise
@tamilselvan.r82627 ай бұрын
@@ophthalmologypearls thank you madam 🫡🫡
@afsanayeasmin72332 ай бұрын
Very useful
@meghakamble89913 жыл бұрын
Thank you so much mam
@sandeeppandey1547 Жыл бұрын
Thank You
@medicine-ki5gv3 жыл бұрын
Thanks a lot doctor 🌹🙏🌹 🇮🇶
@manikadhungana3627 Жыл бұрын
T̤h̤a̤n̤k̤ y̤o̤ṳ ❤
@SomNath-cm3jn Жыл бұрын
I have only CYL number No sphere
@sadekalkhateeb27453 жыл бұрын
excellent
@tamilselvan.r82627 ай бұрын
Perfect👍
@anamikasen93546 ай бұрын
Made it simple 😅❤
@Zinger2026 ай бұрын
Amazing
@Neuromandir6 ай бұрын
magic!
@sunithareddym3 ай бұрын
I had left eye s= - 0.50 C =-1.25 A = 90 Right eye S = 0.50 C= 0.50 A= 86 What is this called ma'am What astigmatism I had
@ophthalmologypearls3 ай бұрын
@@sunithareddym you have not specified the sign of the power in the left eye for both sphere and cylinder
@ophthalmologypearls3 ай бұрын
@@sunithareddym right eye is compound myopic against the rule
@sunithareddym3 ай бұрын
@@ophthalmologypearls minus both sphere and cylinder both minus left eye and right eye ma'am
@sunithareddym3 ай бұрын
Ma'am thank you for replying ma'am IA m stressed with my eye sight what is against rule astigmatism ma'am