quickguide.org

Positive or Negative spherical aberration - What gives a better depth of focus

Reference: Holladay, Jack T. MD, MSEE; Kozhaya, Karim MD; Koch, Douglas D. MD; Wang, Li MD, PhD, Impact of spherical aberration on visual...

Video

Subhabrata Bhattacharya

7 days ago

Understanding Tecnis PureSee IOL

Explains how does the Tecnis PureSee IOL provide depth of focus and intermediate vision to patients.

Optics

Subhabrata Bhattacharya

Mar 26

ETDRS vs Snellen chart

Difference between the Snellen chart and the ETDRS chart based on logmar

Quick

Subhabrata Bhattacharya

Mar 13

Explains chromatic aberration and its relation with diffractive multifocal IOL. It also explains what is meant by zero order, as well as +1 and +2 orders

Diffractive orders with multifocal IOLs, echelette design and the concept of chromatic aberration correction

standard way of diffractive trifocal IOL manufacturing has been to use the 0 order for distance, & the +1 & +2 orders intermediate & near

Optics

Subhabrata Bhattacharya

Mar 8

Understanding spiral optics designed Rayner Galaxy Intra Ocular Lens

Since the launch of the RayOne Galaxy lens, there has been a significant amount of attention focused on spiral optics and how such design...

Optics

Subhabrata Bhattacharya

Mar 1

Negative Dysphotopsia- Video explanation

This is a video explanation on negative dysphotopsia, its causes, symptoms, and treatment options.

Video

Dr S Navneeth Kumar

Jan 19

Blue Light filtering- Benefits and consequences

Video

Subhabrata Bhattacharya

Jan 7

Posterior Capsular Opacification

Video

Subhabrata Bhattacharya

Dec 31, 2024

Common corneal topography indices

Video

Subhabrata Bhattacharya

Dec 19, 2024

Classification of monofocal, enhanced, and EDOF IOLs based on performance on defocus curve

Adapted from the JCRS https://doi.org/10.1097/j.jcrs.0000000000001502

Quick

Subhabrata Bhattacharya

Dec 15, 2024

Biometry case study-Selecting right patient for multifocal IOLs

A case study detailing how to avoid a bad outcome by looking into the IOL calculation or biometry page throughly

Video

Subhabrata Bhattacharya

Dec 8, 2024

How patient axial length, corneal power and effective lens position affect the add power of a multifocal lens

Recently, Filomena and co-authors ( https://doi.org/10.1097/j.jcrs.0000000000001502 ) presented evidence based scientific classification...

Tools

Subhabrata Bhattacharya

Nov 27, 2024

Pin hole test

Video

Subhabrata Bhattacharya

Nov 17, 2024

Pupil size and patient selection for multifocal IOLs

Video

Subhabrata Bhattacharya

Nov 3, 2024

Understanding spiral optics designed depth of focus IOLs

Recently a lot of interest has been generated on the concept of spiral optics and multifocal IOLs and contact lenses.

Optics

Subhabrata Bhattacharya

Sep 16, 2024

2 3 4 5

Services

Online consultation

If you are interested to learn more on any of the content in this website, you are free to subscribe and drop me a message for an online consultation against a coffee..

Subha's Ophthalmic Page

search information related to IOL, biometry, corneal topography, etc.

Positive or Negative spherical aberration - What gives a better depth of focus

Understanding Tecnis PureSee IOL

ETDRS vs Snellen chart

Diffractive orders with multifocal IOLs, echelette design and the concept of chromatic aberration correction

Understanding spiral optics designed Rayner Galaxy Intra Ocular Lens

Negative Dysphotopsia- Video explanation

Blue Light filtering- Benefits and consequences

Posterior Capsular Opacification

Common corneal topography indices

Classification of monofocal, enhanced, and EDOF IOLs based on performance on defocus curve

Biometry case study-Selecting right patient for multifocal IOLs

How patient axial length, corneal power and effective lens position affect the add power of a multifocal lens

Pin hole test

Pupil size and patient selection for multifocal IOLs

Understanding spiral optics designed depth of focus IOLs

Services

Online consultation

quickguide.org