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Subha's Ophthalmic Page
search information related to IOL, biometry, corneal topography, etc.
If you are new to my site:
Keratoconus Classification & Indices
Classification or grades of keratoconus
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Jan 22, 20190 min read
Thoughts on TORIC IOL for a fairly irregular Cornea
When can we choose a TORIC IOL for a fairly irregular cornea. It is critical to look into the central 3 to 4 mm zone of the cornea
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Jan 3, 20192 min read
What to do when your Keratometry readings are different from different Keratometers
When your different keratometry machines give different values of the corneal power of the same patient use the Barrett K calculator.
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Dec 6, 20182 min read
Centroid SIA calculation - ASCRS website
This article is in continuation to my write up in this blog ‘The Why & What of Centroid SIA involving astigmatism correction’. I would...
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Nov 28, 20182 min read
Pupil Test - A Key Element in Multifocal IOL Candidacy
testing if the patient has a reactive pupil is important for multifocal IOL selection. This article describes the pupillary reflex pathway.
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Nov 27, 20187 min read
Quick Links to Useful Sites
AAO https://www.aao.org/ All About Vision https://www.allaboutvision.com/ APSCRS https://www.apacrs.org/ ASCRS http://ascrs.org/ Atlas of...
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Nov 23, 20181 min read
Quick Links to TORIC Calculators,etc
Please go through this excellent article to get started with TORIC IOLs which I believe brings out the quick four points before you start...
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Nov 23, 20181 min read
The ‘Why’ & ‘What’ of Centroid SIA involving astigmatic correction
As the art of correcting corneal astigmatism became popular with Toric IOLs, a predominant concept has been to provide incision on the...
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Nov 23, 20182 min read
For Optical Biometry latest A Constants - https://iolcon.org/searchLens.php
Click on this link :https://iolcon.org/searchLens.php
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Nov 23, 20181 min read
The ‘Why’ & ‘What’ of Centroid SIA involving astigmatic correction.
What is centroid SIA and why is it important not go with a fixed .50D of SIA that you have entered in Toric calculators in the past.
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Oct 31, 20182 min read
Common Topography Indices
Here are explanations to some common topography indices that you will find across several corneal topography machines. While there is no sta
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Oct 22, 20181 min read
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Oct 19, 20180 min read
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Oct 19, 20180 min read
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Oct 19, 20180 min read
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