Biometry; Topography, IOL, etc under one roof

Welcome to quickguide.org ! This site is continuously being built to help you with topics on biometry, corneal topography, phaco, etc.This passion filled page is a capture of my key learnings and intended to share my experience for better outcomes.

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Subhabrata Bhattacharya

Aug 6
11 min

Gaussian optics, Gullstrand eye, & Biometry

In this article we will talk about the different theoretical formulas derived on basis of thin and thick lens equations, and the promise...

Subhabrata Bhattacharya

Nov 15
5 min

Toric IOL surprise-the missing link

A 71 year old man underwent toric implantation with uneventful cataract surgery. It was a pretty straight forward case, with a...

Subhabrata Bhattacharya

Oct 7
3 min

Guide to Pentacam maps

This will take you through a step by step interpretation of 4 composite refractive map of Pentacam. For interpretation of other maps of...

Subhabrata Bhattacharya

Sep 4
7 min

Choosing Intra ocular Lens -2: Optics

Continuing our series on choosing the right Intra Ocular Lens we will discuss on the OPTICS of an IOL with special focus on aspheric...

Subhabrata Bhattacharya

Sep 1
10 min

Choosing Intra Ocular Lens-1 : Material

Choosing the right intra ocula lens (IOL) for cataract surgery is never an easy job for your practice. Infact there may be no one IOL...

Subhabrata Bhattacharya

Aug 22
1 min

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 10
1 min

Biometry - Part II Axial Length

In Part II we discuss about axial length - applanation, immersion based A scan, as well as optical biometry. We also discuss about the...

Subhabrata Bhattacharya

Aug 10
1 min

Biometry - Part I Keratometry

Part I in Biometry describes Keratometry and pearls for a successful keratometry

Subhabrata Bhattacharya

Aug 1
0 min

Conversion of Snellen Chart from feet to meters, decimal, logmar

Subhabrata Bhattacharya

Jul 24
6 min

Understanding the Customer - DISC

Since ages past, there have been attempts to understand human behavior, that is , what we do and why we do. Some of the works dates back...

Subhabrata Bhattacharya

Jul 20
6 min

Modulation Transfer Function (MTF)

Modulation Transfer Function While in-clinic contrast sensitivity tests give us an idea of the IOL performance in real world, optical...

Subhabrata Bhattacharya

Jul 10
1 min

Bascis of Phaco - Part III

Here in Part III of Basics of Phaco series, we talk about different forms of energy delivery modalities available with phaco machines -...

Subhabrata Bhattacharya

Jul 7
1 min

Understanding Corneal Topography and Pentacam - Part I

The Part I of a series on corneal topography and elevation based tomography like Pentacam, will show you step by step how to interpret...

$Diffractive Multifocal IOL Science$

Subhabrata Bhattacharya

Jul 4
0 min

Diffractive Multifocal IOL Science

Subhabrata Bhattacharya

Jul 3
1 min

Cooke-modified axial length (CMAL)

Before you use the Cooke modified axial length, here are a quick review of facts : You may have bought that expensive optical biometry...

Subhabrata Bhattacharya

Jun 25
1 min

The science behind Barrett Universal II formula

This will describe Barrett Universal II formula, its origin and science behind it, Lens Factor and Gaussian formula for total corneal...

Subhabrata Bhattacharya

Jun 20
1 min

Interpreting Zernike Polynomials in Ophthalmology

https://www.youtube.com/watch?v=NmdmWJ6lXq0

$Science Behind Diffractive Multifocals$

Subhabrata Bhattacharya

Jun 14
9 min

Science Behind Diffractive Multifocals

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...

Subhabrata Bhattacharya

Apr 14
7 min

Optical Biometry - Myth & Science

Optical Biometry – Myths & Science There is no denying the fact that optical biometry has led to a sea change in refractive outcomes ever...

Subhabrata Bhattacharya

Mar 3
4 min

Decoding Snellen Chart in 4 mins !

I will not start here with the history behind Snellen chart, since Dutch ophthalmologist introduced the Snellen chart in 1862. Rather...

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Subha's Ophthalmic Page - quickguide.org

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Thanks for your interest in Subha's Ophthalmic Page - quickguide.org . For more information, feel free to get in touch and I will get back to you soon!

Subha's Ophthalmic Page - quickguide.org

Ophthalmic Quick Guide

Best viewed on desktop

as on Nov'20 there are 71 items for you to check out

Biometry; Topography, IOL, etc under one roof

Gaussian optics, Gullstrand eye, & Biometry

Toric IOL surprise-the missing link

Guide to Pentacam maps

Choosing Intra ocular Lens -2: Optics

Choosing Intra Ocular Lens-1 : Material

Design Factor of IOLs for Barrett formula

Biometry - Part II Axial Length

Biometry - Part I Keratometry

Conversion of Snellen Chart from feet to meters, decimal, logmar

Understanding the Customer - DISC

Modulation Transfer Function (MTF)

Bascis of Phaco - Part III

Understanding Corneal Topography and Pentacam - Part I

Diffractive Multifocal IOL Science

Cooke-modified axial length (CMAL)

The science behind Barrett Universal II formula

Interpreting Zernike Polynomials in Ophthalmology

Science Behind Diffractive Multifocals

Optical Biometry - Myth & Science

Decoding Snellen Chart in 4 mins !

Subha's Ophthalmic Page - quickguide.org

Subha's Ophthalmic Page - quickguide.org

Ophthalmic Quick Guide

Best viewed on desktop

Biometry; Topography, IOL, etc under one roof

​

Gaussian optics, Gullstrand eye, & Biometry

Toric IOL surprise-the missing link

Guide to Pentacam maps

Choosing Intra ocular Lens -2: Optics

Choosing Intra Ocular Lens-1 : Material

Design Factor of IOLs for Barrett formula

Biometry - Part II Axial Length

Biometry - Part I Keratometry

Conversion of Snellen Chart from feet to meters, decimal, logmar

Understanding the Customer - DISC

Modulation Transfer Function (MTF)

Bascis of Phaco - Part III

Understanding Corneal Topography and Pentacam - Part I

Diffractive Multifocal IOL Science

Cooke-modified axial length (CMAL)

The science behind Barrett Universal II formula

Interpreting Zernike Polynomials in Ophthalmology

Science Behind Diffractive Multifocals

Optical Biometry - Myth & Science

Decoding Snellen Chart in 4 mins !

Subha's Ophthalmic Page - quickguide.org

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