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, 2021
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

Aug 4
1 min

Multifocal IOL patient evaluation

Below you will find the steps to evaluate the anterior segment to determine the candidacy of multifocal IOL/multifocal Toric IOL for...

Subhabrata Bhattacharya

May 17
7 min

Spheric, Aspheric and Freeform lenses

The objective of this article is to understand different types of lenses and their effect on spherical aberration correction. We...

Subhabrata Bhattacharya

Apr 22
2 min

Vivity extended depth of focus lens

Alcon claims Vivity as the first and only non-diffractive extended depth of focus IOL. It introduces what the company names as X-Wave...

Subhabrata Bhattacharya

Mar 29
3 min

Near Visual Acuity

In an earlier article Decoding Snellen Chart In 4 Mins https://www.quickguide.org/post/decoding-snellen-s-chart-in-4-mins we have touched...

Subhabrata Bhattacharya

Feb 27
4 min

Axial length measurement with Bscan

Measuring the axial length of some patients with the contact/immersion ultrasound biometry or even with the optical biometry machine may...

Subhabrata Bhattacharya

Feb 23
1 min

Sirius Topography Indices

Here is suggestive indices to apply for Sirius topography maps. For Pentacam map interpretation please follow the link...

Subhabrata Bhattacharya

Jan 22
7 min

IOL power calculation in keratoconus

In this article we will discuss about IOL power calculation in non progressive keratoconus patients. keratoconus is a relatively common...

Subhabrata Bhattacharya

Jan 12
7 min

Guide to Pentacam Holladay EKR Report

Here I will try to explain the Holladay (Equivalent Keratometry Reading ) EKR report, and how this report could help in biometry for IOL...

Subhabrata Bhattacharya

Nov 15, 2021
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, 2021
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, 2021
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, 2021
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, 2021
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, 2021
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, 2021
1 min

Biometry - Part I Keratometry

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

Subhabrata Bhattacharya

Aug 1, 2021
0 min

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

Subhabrata Bhattacharya

Jul 24, 2021
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, 2021
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, 2021
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 -...

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Subha's Ophthalmic Page - quickguide.org

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Subha's Ophthalmic Page - quickguide.org

Ophthalmic Quick Guide

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as on Jan'22 there are 94 items for you to check out

Biometry; Topography, IOL, etc under one roof

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

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Subha's Ophthalmic Page - quickguide.org

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