What is the index of refraction of the crystalline lens?

The index of refraction of the crystalline lens is typically around 1.42, which corresponds with the choice provided. This value indicates how much light is bent, or refracted, as it passes through the lens. In the context of the eye, the crystalline lens plays a crucial role in focusing light onto the retina, and its relatively high index of refraction allows it to effectively bend light necessary for sharp vision.

The reason that 1.42 is a standardized value arises from the composition and structure of the lens itself, which contains many proteins and water, contributing to its optical properties. This index is essential in understanding how the lens interacts with light compared to other structures in the eye, such as the cornea, which has a different refractive index. Understanding these values can be critical for vision scientists and eye care professionals when diagnosing and treating various vision problems.