Is the part of the eye that contains the receptor cells.
The boney socket in the skull.
A thin, transparent membrane that is covering the front of the eye.
Where the fluid that keeps the conjunctiva moist is made.
The enzyme that is inside the fluid.
They stop dirt from landing on the surface of your eyes.
It is a very tough coat that is surrounding the inside of the orbit.
The part of the retina where the receptor cells are packed most closely together.
The place where there are no receptor cells where the optic nerve leaves the retina.
They are sensitive to quite dim light, but they do not respond to colour.
they are able to distinguish between the different colours of light, but they only function when the light is quite bright.
a circular piece of tissue
it bends most of the light.
it makes fine adjustments.