The refractive media of the eyeball is made up of structures that take part in focusing the ray of light onto the retina so the photoreceptors can detect it. The eye has four refractive media structures: the cornea, lens, vitreous body, and aqueous humor.

What does media mean in refraction?

1. The deflection of a wave, such as a light or sound wave, when it passes obliquely from one medium into another having a different index of refraction. 2. Astronomy The apparent change in position of a celestial object caused by the bending of light rays as they enter Earth's atmosphere. 3.

What is the first refracting medium of the eye?

Light entering the eye is first bent, or refracted, by the cornea — the clear window on the outer front surface of the eyeball. The cornea provides most of the eye's optical power or light-bending ability.