Our eye contains of eyelids, eyelashes,eyebrows and lachrymal glands. A thin layer , called conjunctiva covers the front portion of the eye. The eye ball is located in the eye socket . only 1/6 portion of the eye ball is visible to us .
Eye has three main layers. they are sclerotic layer or sclera , choroid layer and retina. the outer most thick tough ,fibrous , non-elastic and white coloured layer is sclera . the sclera bulges and forms cornea . the end of sclera connects to the optic nerve . the second layer is choriod layer. this layer is black in colour and contains a lot if blood vessels. ait encloses the eye except the part pupill. the part formed by the choroid layer around the pupil is iris. Radial and circular uscles are present in the iris . biconvex lens is present immediately behind the pupil is attached to the ciliary muscles and suspensory lingaments .
the lens dividesd the inner eye ball as aqueous chamber and vitreous chamber. aqueous chamber is filled with water like fluid whereas vitreous chamber is filled with jelly like fluid .
retina contains the cels , called rods and cones . the area of the vision , called blind spot and the area of the best vision , called yellow spot are present in the present in the retina. The yellow spot is called macula or fovea