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

Understanding the basics of optics is essential for eye care professionals because it enables them to accurately diagnose and manage various visual problems. A solid foundation in optics helps professionals explain how light interacts with the eye, understand refractive errors such as myopia, hyperopia, astigmatism, and presbyopia, and determine appropriate corrective measures like glasses, contact lenses, or surgical options. Additionally, knowledge of optics allows for the

This post highlights ten essential things to check in the optical biometry chart. Understanding these factors helps surgeons make informed decisions, improving refractive outcomes and patient satisfaction.

Have you ever wondered why they say that for every 1 degree of rotation, there is a loss of 3.3% in toric correction at the cornea plane? Why 3.3%, why not 2%, why not 4%. Where on earth does the 3.3 come from? Here is a breakdown of where the number comes from. Although there is some math involved, I will keep it simple and conceptual. To start with, in ophthalmology, 0 degree and 180 degrees are considered as the same meridian. Aligning the Toric IOL at 0 degrees in the eye

Provides detailed understanding of IOL power calculation formulas and biometry

This video explains how modern IOLs including EDOF IOLs work to provide depth of focus and intermediate vision to patients. It also explains how to interpret the defocus curve or how to generate a defocus curve for such patients.

The Challenge of Multifocal IOLs Patients with multifocal IOLs expect to be free from glasses for distance, intermediate, and near vision. However, refractive surprises can occur, leading some patients to still require glasses. In my earlier article, "The Mystery of the Near with Presbyopia Correction IOL" ( link ), I discussed how factors like corneal shape and axial length can affect near vision. In this article, I will explain how a refractive surprise or incorrect refract

Explains how the Toric IOL nomenclature works and how the IOL power is distributed in the IOL optics for a spherical equivalent IOL power of 10 diopters and a Toric model of T4 or T5

This article provides insights into the different modern IOL power calculation formulas like the Barrett Universal, Kane and EVO formula

The following table will help in the choice of EDOF IOL based on spherical aberration of the cornea of the patient and the induced spherical aberration by the IOL

This article provides an understanding of circle of least confusion or best focus in presence of spherical aberration and what kind of spherical aberration may provide a better depth of focus

finding the cut off value for mesopic pupil size may be important for clinicians to ensure that patients have a good distance vision even in low light

How does the Panoptix Pro utilize more light and reduce light scatter.

Why some patients may not be happy with an EDOF IOL.