What is the index of refraction of the tear film?

The index of refraction of the tear film is approximately 1.336. This value is important as it represents how light propagates through the tear film, which covers the surface of the cornea in the eye. The tear film's refractive index is crucial for maintaining clear vision as it plays a significant role in how light is focused onto the retina.

The relatively low refractive index of the tear film compared to materials such as glass or other optical media allows for effective light transmission and ensures minimal scattering. This property is essential for providing optimal vision and protecting the cornea from damage.

Understanding the refractive index of the tear film helps in the design and fitting of contact lenses, as it must be compatible with the natural refractive properties of the eye to ensure comfort and visual acuity.