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

Recently, Filomena and co-authors ( https://doi.org/10.1097/j.jcrs.0000000000001502 ) presented evidence based scientific classification of partial and full range vision lenses. Based on their classification, I could summarize the following: a) IOLs that provide more than 2.3 diopter of pseudo-accommodation at .2 log mar (6/9.5 or 20/32) in the defocus curve can be classified as full range of vision IOLs b) IOLs that provide less than 2.3 diopter of pseudo-accommodation at

The following video content is an impression of how the Barrett Universal II formula works. Barrett Universal II is an unpublished...

This calculator will help you to calculate the power of cornea from the radius of curvature

A common notion amongst clinicians is that the labelled power (diopter) on the IOL box is precisely the power of the IOL. That is, the...

Objective: This tool helps you to find following things: What is the true size of the diameter of the central bull's eye of the diffractive multifocal IOL Where is the light passing through the bull's eye dedicated to How to Use: A. Enter the add power of the diffractive IOL B. Enter the wavelength of light ( usually 550 or 555 nm of light is the industry standard) Example: A diffractive multifocal IOL of 3.75 add power claiming its central bull's eye zone to be .769 should d

Objective of this article: In this article I am proposing a method that helps manufacturers as well as users adapt IOL box A constant to...

This tool helps you to calculate the lens power based on thick lens formula. It also helps locate principal plane in the optic

Optical axis of the eye is a theretical concept. Clinically, if a point source of light was projected to the eye, then all reflexes from the

The refraction shown against target IOL Power in the biometry page is not emmetropia but a spherical equivalent.

At the end of the reading, you will get an understanding of the design of the Extended Depth of Focus (EDOF) IOLs in the market, and how the

Point spread Function gives us an understanding of the resolution of an optical system.