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Subha's Ophthalmic Page
search information related to IOL, biometry, corneal topography, etc.
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Design Factor of IOLs for Barrett formula
Here are the suggested Design Factors of some common Intra Ocular Lenses for the Barrett Universal formula. If you are looking for Lens...

Subhabrata Bhattacharya
Aug 22, 20211 min read
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Biometry - Part II Axial Length
Talks about axial length measurement in Biometry for IOL power calculation

Subhabrata Bhattacharya
Aug 10, 20211 min read
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Biometry - Part I Keratometry
Part I in Biometry describes Keratometry and pearls for a successful keratometry

Subhabrata Bhattacharya
Aug 10, 20211 min read
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Gaussian optics, Gullstrand eye, & Biometry
THe role of mathematics and gaussian optics in Biometry for IOL power calculation

Subhabrata Bhattacharya
Aug 6, 202112 min read
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Conversion of Snellen Chart from feet to meters, decimal, logmar
How to convert from one snellen chart metric to another - conversion of metres to feet or log mar, etc

Subhabrata Bhattacharya
Aug 1, 20210 min read
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Understanding the Customer - DISC
DISC profile and how to respond to different behavioural pattern demonstrated by persons you are speaking to

Subhabrata Bhattacharya
Jul 24, 20216 min read
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Modulation Transfer Function (MTF)
Explains what is Modular Transfer Function or MTF and what does it indicate about a lens capability of transferring image contrast

Subhabrata Bhattacharya
Jul 20, 20219 min read
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Bascis of Phacoemulsification(Video) - Part III
In Part III of Basics of Phaco series we look into phaco energy delivery modalities like Continuous power and Pulse mode. If you have not...

Subhabrata Bhattacharya
Jul 10, 20211 min read
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Understanding Corneal Topography and Pentacam - Part I
Corneal power maps in Pentacam

Subhabrata Bhattacharya
Jul 7, 20211 min read
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Diffractive Multifocal IOL Science
Takes you through the origin and science behind diffractive multifocal IOLs

Subhabrata Bhattacharya
Jul 4, 20210 min read
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Cooke-modified axial length (CMAL)
How CMAL may be the answer to traditional optical biometry measuring axial length on the basis of group refractive index

Subhabrata Bhattacharya
Jul 3, 20212 min read
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The science behind Barrett Universal II formula
The below video will describe Barrett Universal II formula, its origin and the science behind it, including Lens Factor and the Gaussian...

Subhabrata Bhattacharya
Jun 25, 20211 min read
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Science Behind Diffractive Multifocal IOL
The author visiting Lighthouse (optics) in Kerala, India in 2018. There are very few people who would not stop by to see, if ever they pass by a Lighthouse. A Lighthouse is one of those few things that has always intrigued us and caught our imagination. Standing by the sea or the ocean, the Lighthouse has stood tall through the test of centuries to help men navigate through the many vagaries of sea life and reach destination safely. Though the history of Lighthouse can be tra

Subhabrata Bhattacharya
Jun 14, 202112 min read
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Optical Biometry - Myth & Science
Optical biometry has added much value to refractive outcome, but there are some myths and misconceptions associated with optical biometry

Subhabrata Bhattacharya
Apr 14, 20219 min read
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Decoding Snellen Chart in 4 mins !
This explains the science behind the Snellen chart and why is it kept at a distance of 6m or 20f from the eye

Subhabrata Bhattacharya
Mar 3, 20214 min read
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