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.

New !!! Biometry Validation Tool - Click Here

Subhabrata Bhattacharya

4 days ago
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
5 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

$The Science Behind Diffractive Presbyopia Correcting IOLs$

Subhabrata Bhattacharya

Jun 14
9 min

The Science Behind Diffractive Presbyopia Correcting IOLs

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
6 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...

Subhabrata Bhattacharya

Feb 10
1 min

Second Eye IOL Power calculator based on First Eye Prediction error

quickguide.org Subhabrata Bhattacharya subhabrata1234@rediffmail.com If you had a more than .50 diopter of refractive error in the first...

$How do you choose IOL power for the second eye, when there has been refractive error in first eye ?$

Subhabrata Bhattacharya

Feb 9
0 min

How do you choose IOL power for the second eye, when there has been refractive error in first eye ?

Subhabrata Bhattacharya

Feb 4
0 min

How to choose a non Toric IOL Power for astigmatism patients

Subhabrata Bhattacharya

Dec 17, 2020
7 min

A simple interpretation of Zernike Polynomials

Few images in wavefront optics has been as common as Zernike Polynomials, yet it is a subject that has been obscured with trepidation and...

Subhabrata Bhattacharya

Nov 25, 2020
1 min

New ! A constant to Lens Factor (LF) conversion for Barrett

Here is Lens Factor to corresponding A constant for Barrett Universal II. Note :Suggested Guideline only. Please use your own judgement...

Subhabrata Bhattacharya

Aug 19, 2020
5 min

Binocular Summation – Understanding Patient Candidacy for Multifocal IOLs

Depth perception is an important aspect in our every day life, and therefore the need to evaluate and consider before multifocal IOL...

Subhabrata Bhattacharya

Jul 26, 2020
1 min

Eye & Astigmatism - Part IV

https://www.youtube.com/watch?v=6U2tr2Lgwdo&t=42s

Subhabrata Bhattacharya

Jul 26, 2020
1 min

Eye & Astigmatism - Part III

https://www.youtube.com/watch?v=7c9xTsMVJFE&t=690s

Subhabrata Bhattacharya

Jul 26, 2020
1 min

Eye & Astigmatism - Part II

https://www.youtube.com/watch?v=1FUUCmq9lAQ&t=221s

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Subha's Ophthalmic Page - quickguide.org

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

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

The Science Behind Diffractive Presbyopia Correcting IOLs

Optical Biometry - Myth & Science

Decoding Snellen Chart in 4 mins !

Second Eye IOL Power calculator based on First Eye Prediction error

How do you choose IOL power for the second eye, when there has been refractive error in first eye ?

How to choose a non Toric IOL Power for astigmatism patients

A simple interpretation of Zernike Polynomials

New ! A constant to Lens Factor (LF) conversion for Barrett

Binocular Summation – Understanding Patient Candidacy for Multifocal IOLs

Eye & Astigmatism - Part IV

Eye & Astigmatism - Part III

Eye & Astigmatism - Part II

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

​

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

The Science Behind Diffractive Presbyopia Correcting IOLs

Optical Biometry - Myth & Science

Decoding Snellen Chart in 4 mins !

Second Eye IOL Power calculator based on First Eye Prediction error

How do you choose IOL power for the second eye, when there has been refractive error in first eye ?

How to choose a non Toric IOL Power for astigmatism patients

A simple interpretation of Zernike Polynomials

New ! A constant to Lens Factor (LF) conversion for Barrett

Binocular Summation – Understanding Patient Candidacy for Multifocal IOLs

Eye & Astigmatism - Part IV

Eye & Astigmatism - Part III

Eye & Astigmatism - Part II

Subha's Ophthalmic Page - quickguide.org

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