Pupil
The cornea is the avascular structure of the eye that allows light to enter. It is a transparent outer covering that refracts light onto the lens.
The pupil.
pupil
Cornea
Light enters the eye through the cornea, a clear covering over the front of the eye. In low light conditions, the pupil dilates to allow more light to enter the eye. Additionally, the retina contains specialized cells called rods which can detect light even in low lighting, contributing to night vision.
The cornea and the pupil are the parts of the eye that allow light to enter. The cornea acts as a protective outer layer that helps to focus light, while the pupil is the opening in the center of the iris that regulates the amount of light entering the eye.
pupil
The iris has an opening, called the pupil, through which light enters the eye.
Pupil
pupil
Light rays enter the eyeball through the cornea, the clear outer covering of the eye.
The iris contracts to allow less light to enter the eye. This is controlled by the autonomic nervous system in response to changing light conditions, helping to regulate the amount of light reaching the retina.