This page is dedicated to the simplified study of light propagation within the eye and the main propagation media of interest in Ophthalmology, such as those constituting ocular tissues. Snell’s law is a fundamental property in geometrical optics and at the origin of the vergence formula. The vergence formula builds the backbone of all IOL […]

This page aims to demystify the concept of “principal planes,” which often appear to be quite “esoteric” to non-specialists. In a thick lens system, the principal planes are two hypothetical planes at which all the refraction can be considered to happen. They are used to establish a paraxial simplified model, making it possible to predict […]