The Eye

The Eye

The Structure of the Eye

Cornea

• Front part of the tough outer coat, the sclera. It is convex and transparent.

• refracts light - bends it as it enters the eye

Iris

• Pigmented - decides the colour of your eyes - so light cannot pass through. Its muscles contract and relax to alter the size of its central hole or pupil.

• controls how much light enters the pupil

Lens

• Transparent, bi-convex, flexible disc behind the iris attached by the suspensory ligaments to the ciliary muscles.
• focuses light onto the retina

Retina

• The lining of the back of eye containing two types of photoreceptor cells - rods - sensitive to dim light and black and white - and cones - sensitive to colour. A small…