Features

• retina


  incoming light is focussed on the retina, contains light receptor cells called rods and cones to detect light intensity + colour
• optic nerve


  contains neurons that transmit the impulses between the eye and brain to process received info and form an image
• sclera


  the tough, white opaque outer layer that protects the eye
• cornea


  transparent, allows light to enter the eye, light is refracted as it enters the eye via the cornea to help focus rays onto the retina
• iris


  made up of circular + radial muscles that contract and relax to dilate the pupil
• ciliary muscles


  they're attached to the lens by the suspensory ligaments and alter the shape of the lens to focus incoming light
• suspensory ligaments 


  attaches the ciliary muscles to the lens of the eye