a circular hole in front of the eye

(a)  

adjusts the size of the pupil

(a)  

The ——- grows bigger when we are in a dark place. This is to let more light enter the eye. The —— becomes smaller when it is too bright.

(a)  

focuses the light so it forms a clear image on the retina,

(a)  

is near the back of the eye where images are formed

(a)  

Like jelly

(a)  

transmits signals to the brain

(a)  

folds of skin above and below the eye

(a)  

the hairs above the eye. They protect the eyes from dust and sweat coming from the forehead

(a)  

tiny hairs that are attached to the eyelids. The eyelashes also protect the eyes from dust.

(a)  

adjust the shape of the lens of the eyes

(a)