Tough supporting wall of the eye - Sclera
Transparent outer layer found at the front of the eye. Refracts (bends) light into the eye - Cornea
Contains muscles that allow it to control the diameter of the Pupil (hole in the middle) and therefore
how much light enters the eye - Iris
Focuses light...
GCSE AQA Biology- The Eye
Tough supporting wall of the eye - ✔✔✔Sclera
Transparent outer layer found at the front of the eye. Refracts (bends) light into the eye - ✔✔✔Cornea
Contains muscles that allow it to control the diameter of the Pupil (hole in the middle) and therefore
how much light enters the eye - ✔✔✔Iris
Focuses light onto the retina - ✔✔✔Lens
Contains receptor cells sensitive to light intensity and colour - ✔✔✔Retina
Controls the shape of the lens - ✔✔✔Ciliary Muscles and Suspensory Ligaments
Carries impulses from the receptors on the Retina to the Brain - ✔✔✔Optic Nerve
Pupil decreases in size as the circular muscles in the Iris contract and radial muscles relax - ✔✔✔
Adjusting To Bright Light
Pupil widens as the radial muscles in the Iris contract and the circular muscles relax - ✔✔✔Adjusting To
Dim Light
Ciliary muscles contract, meaning the suspensory ligaments slacken, causing the lens to fatten (curve)
increasing the amount by which it refracts light - ✔✔✔Focusing On Near Objects
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