Spherical Equivalent / Common mistakes in SPHERICAL EQUIVALENT

OPTOMETRY WITH KHURRAM
In this video we will learn about every aspect of Spherical equivalent.. And all common misteks in SPHERICAL equivalent.
What is #SphericalEquivalent??
Why we perform this spherical equivalent.??
Comparison of Spherical equivalent in normal prescriptions and Jackson cross cylinder.
Construction of JCC
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• How to make Jackson Cr...
First step of JCC
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• (Bracketing) First ste...
2nd Step axis refinement
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• Axis Refinement (2nd S...
Last step power refinement and Spherical equivalent
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• Power Refinement and S...

[@sar6zzle]

Thank you! Very helpful explanation!

[@optometrywithkhurram6867]

Thankyou..Sarai Alex.

[@otiebrown9999]

I do all my measurements using a Spherical lens. It is quite accurate.

[@optometrywithkhurram6867]

👍👍

[@otiebrown9999]

Personally, I prefer using Spherical lenses, to establish my own refractive state. The DMV does not require that cylinder be measured.

[@ronak_singh_]

If i say i have 0.5sp,-1.5cy 180axis It gives me 1.25sp..right? But is it means -1 cy is eq to -.5 cy?

[@drsundipshenoy2471]

Excellent presentation Mr Khurram ji. 👏

[@optometrywithkhurram6867]

🌸🌸

[@optitechnoopticianskurunegala]

Dear sir, when doing JCC add +0.25 with each - 0.50 cylinder at increases cylinders. Then finally should we do JCC Spherical equivalent again ???

[@optometrywithkhurram6867]

No... Once you add 0.25 in 0.50 cyl increase , then no need to perform spherical equivalent again.

[@optitechnoopticianskurunegala]

@@optometrywithkhurram6867 😍

[@AB-uh3cf]

Hello. First of all, thank you so much for your wonderful explanations! I have a question about my prescription (which has sent me down an educational rabbit hole). My glasses prescription is +0.25 / -0.50 / 010 (right eye), and then the same, but with an axis of 005 in the left eye. I've been trying contacts to no avail, so it started me on a mission to learn as much as I can. With my glasses, the slight astigmatism correction makes a very noticeable difference, but we can't get the contacts right. Currently, I'm trying PWR 0.00, -0.75, axis 180 (OS) and 10 (OD). I feel as though the astigmatism correction might be too strong with these lenses. If I understand correctly, doing the spherical equivalent would negate everything as the SPH value would be 0. However, would it be possible to ignore the +0.25 SPH correction, and only correct the astigmatism using the spherical equivalent and have a sphere value of -0.25? My previous eye doctor said I wouldn't be able to get contacts, and I think now I understand why. I tried contacts correcting just the farsightedness, and it made my overall vision worse, so I'm hoping that maybe I can correct just the astigmatism. Thank you so much!

[@optometrywithkhurram6867]

Welcome for your compliment dear. And as your question is concerned..well I suggest that don't go for contact lenses with the prescription you have. But as per my practice, I suggest you to use only -0.50 cylinder in both eyes with corrected axis that will give you good vision.

[@AB-uh3cf]

@@optometrywithkhurram6867 Thank you so much for your reply. Because my astigmatism is so slight, I'm definitely coming to understand that glasses are going to give me the clearest option. But in your opinion, do you think if I only focused on the astigmatism and got -0.25 SPH power lenses (using the spherical equivalent, and just ignoring my current SPH power since it's also very slight) that that would at least make my astigmatism better than if I were wearing nothing at all? I tried correcting only the farsightedness, but that didn't help. But in the past, correcting only my astigmatism was still at least an improvement over nothing at all. I'm just looking to have contacts for situations where it would just be more convenient to not have anything on my face, but still primarily use my glasses. Thank you so much again!

[@optometrywithkhurram6867]

@@AB-uh3cf if you wear just 0.25 spherical it would be useless. And it will be difficult to handle. If you really want to wear contacts then there is only option for you to wear -0.50 cylinder with your corrected axis.

[@besoftcool]

2:54 time ..SE is possible when cylinder 1+ either 1- ×90° or any axis of +1&-1 cylinder power?

[@optometrywithkhurram6867]

Yes...spherical equivalent will work when cyl power would be 1.00 plus or minus.

[@Manisha-re9vy]

Thank you for the video

[@CHEFSECRET19]

Sir can you pleazz upload videos related to orthoptic , your videos are really help full for us.

[@optometrywithkhurram6867]

Any specific topic regarding orthoptics ?

[@CHEFSECRET19]

@@optometrywithkhurram6867 like phoria, tropia, how to differentiate between them, how to measure their deviation in near and distance??, at which angle this deviation is??

[@optometrywithkhurram6867]

@@CHEFSECRET19 noted

[@CHEFSECRET19]

@@optometrywithkhurram6867 thank you sir

[@CHEFSECRET19]

Sir I have a question that when we did spehrical equivalency so why we write cylindrical corrections In JCC?

[@optometrywithkhurram6867]

kzbin.info/www/bejne/b3e8nKapnpKYprs Watch this video..it will clear all your concepts regarding spherical equivalent and JCC.

[@CHEFSECRET19]

@@optometrywithkhurram6867 I watched video and now i have clear concept regarding JCC and spehrical equivalent. Thanks for helping us by making such a nyc videos.

[@optometrywithkhurram6867]

@@CHEFSECRET19 🌸👍

[@optometrywithkhurram6867]

@@CHEFSECRET19 🌸👍

[@optometrywithkhurram6867]

@@CHEFSECRET19 🌸👍

[@saurabhpipliya6543]

Great knowledge sir

[@optometrywithkhurram6867]

Keep watching

[@dr.malikaqeel5631]

Great Explaination sir

[@optometrywithkhurram6867]

🌸🌸

[@katarzynarej]

Thank you , 👏

[@venkataramanareddy3708]

Which is good auto Refractometer

[@optometrywithkhurram6867]

Topcon family is good

[@vivek-fo8vb]

my astigmatism in L-1.25 ...... when i do sph equivalent my astigmatism is increasing?

[@optometrywithkhurram6867]

No need to get spherical equivalent in your case..if you feel no problem in your glasses then continue..otherwise you can undercorrect it by optometrist

[@vivek-fo8vb]

@@optometrywithkhurram6867 6/9 or 6/12 undercorrection ?

[@optometrywithkhurram6867]

@@vivek-fo8vb yes if this prescription is not comfortable then you must have a new eye test..and you can adjust your prescription.

[@samirsingh4395]

Sir I want to I purse my training in your guidence

[@mafia1270]

Hello sir..just want to ask,..after all the computation you make getting the spherical equivalent , do you need to convert it to contact lens using the contact lens conversion chart or you ' ll just end up there and give it as it was? Supposedly the px wants contact lens

[@mafia1270]

Sir..i have a lot of questions regarding contact lens.. i hope you can help me

[@optometrywithkhurram6867]

Yes you can convert it into contact lens prescription after Spehrical equivalent.

[@optometrywithkhurram6867]

Sure..

[@seethaljayakumar]

Can you please do transposition?

[@optometrywithkhurram6867]

kzbin.info/www/bejne/inPVc4KvoLR_fLs This is complete video on transposition.

[@prasoonvodnala3887]

Sir if cyl is -1.25 what will be the half of cyl

[@optometrywithkhurram6867]

0.75.. 0.25 is not really considerable

[@habiburrehmankhan3622]

@@optometrywithkhurram6867 not clear?

[@rajeshtripura725]

Sir! In what condition sph equi.. should be applied?

[@optometrywithkhurram6867]

If cyl is upto 1.5 cyl then you can apply spherical equivalent to minimize cyl.

[@arbazshaikh5135]

Thanks sir

[@optometrywithkhurram6867]

All the best

[@kashifkulachi3249]

👌👍

[@optometrywithkhurram6867]

👍

[@krishverma8183]

💋

[@optometrywithkhurram6867]

🧐

[@krishverma8183]

@@optometrywithkhurram6867 💋

[@farzanabanu8012]

Thanks you so much sir

[@optometrywithkhurram6867]

All the best

[@cricketgalaxy8718]

Dear sir for TOTAL POWER CALCULATION in terms of diaptor spherical equalent is used ?for example SPH -2.50 and CYL -1.50 /10 what will be the total eye power in terms of diaptor????

[@optometrywithkhurram6867]

The spherical equivalent of this power would be -3.25 spherical .. But Spehrical equivalent only be used when cylinder is not adjusted..as I mentioned in lecture.

[@cricketgalaxy8718]

@@optometrywithkhurram6867 thank you for your reply sir....sir actually For railway recruitment official notice says that "the power of lens should not exceed 4D" Suppose I have both SPH -2.75 and CYL -1.50 power like in this case power exceed 4D or what???? Waiting for your reply sir thank you

[@optometrywithkhurram6867]

@@cricketgalaxy8718 yes dear it's actually exceeding from 4 diopters.

[@obianujunwangwu2816]

Thank you sir

[@Apiyapandey650]

Thanku sir 😊

[@optometrywithkhurram6867]

You are welcome.. Keep watching

[@sadiyaabdullahi5939]

Very educative indeed,sir please I have a question,is this spherical equivalent in JCC also applied when using stenopic slit.thank you very much

[@optometrywithkhurram6867]

Thankyou..💕 No.. actually JCC and Stenopic slit both are diffrent accessories and have different principles. There is no any spherical equivalent while using stenopic slit.

[@sadiyaabdullahi5939]

@@optometrywithkhurram6867 thank you very much sir.

[@SupriyoDeySarkar]

Suppose a person has +2.00/-2.00×90 What would be the spherical equivalent?

[@lifeisgood-nk2dz]

+2.00cyl 180 yes?

[@sheshramgupta3890]

+spherecial to -cylindrical kaisea karea

[@optometrywithkhurram6867]

Suppose prescription is. +2.00DS/ -1.00 DC 180 Half of cyl is = -0.50 cyl Then +1.50 DS will be the final prescription.

[@jessicaa954]

How about no myopia and -.75 astigmatism? What is the half of it? Can I use it with regular contact lenses?

[@optometrywithkhurram6867]

Jessica ..let me make a detailed video on this topic.

[@jessicaa954]

@@optometrywithkhurram6867 thank you!

[@jessicaa954]

Toric lenses is not an option since its very expensive here in my country. Hope you can help me. I just want to enjoy the special occasions without my glasses on and without a headache.

[@alihaneefa2287]

- 2.00 -1.00 160* Any change axes

[@optometrywithkhurram6867]

ask question clearly dear.??

[@amitavbiswas7065]

In railway medical, if power of lenses not exceed to 4D, candidate is eligible. My right eye has a power of -3.50 spherical, -. 75 cylindrical 20 degree axis. Is it less than 4D?

[@devip5207]

Clearly explained tq sir

[@optometrywithkhurram6867]

Welcome dear

[@aswathyachu1770]

Thank you sir

[@optometrywithkhurram6867]

All the best

[@alihaneefa2287]

Thx sir

[@optometrywithkhurram6867]

thankyou

[@saurabhpipliya6543]

👏👏👏👏

[@optometrywithkhurram6867]

keep watching

[@vivek-fo8vb]

-1.5-1.5 ×60 sph equi

[@optometrywithkhurram6867]

-2.25 spherical is your equivalent.. But you should use your real number .