Questions: Light Light enters the eye through the lens ciliary muscles cornea retina

The answer is the third one: cornea.

Explanation for each option:

• Lens: The lens is located behind the cornea and is responsible for focusing light onto the retina. However, it is not the first structure that light encounters when entering the eye.

• Ciliary muscles: These muscles are involved in changing the shape of the lens to focus light, but they do not play a role in the initial entry of light into the eye.

• Cornea: The cornea is the transparent front part of the eye that covers the iris, pupil, and anterior chamber. It is the first structure that light passes through when entering the eye, making it the correct answer.

• Retina: The retina is located at the back of the eye and is responsible for converting light into neural signals. Light reaches the retina after passing through the cornea, lens, and vitreous humor, so it is not the first point of entry.

In summary, light first enters the eye through the cornea.