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The Eye
08/08/2023
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The eye (3) Comea (4) Lens is a sense organ (1) Gliary muscle (2) Iris (41) and (6): Controls the (Biology) the eye that (5) Pupil (6) Suspensory. carry out (2) and (5): The Iris to control the The In's retina refracts (4) and (8): The which Iris Pupil shape of the contains Muscles that allow it diameter of the pupil and light therefore how Much enters the (3): Transparent outer layer of the front of the eye, it the eye. light rays into leas focuses light onto the retina contains receptor cells sensitive to light intensity accomodation. and colour (7): ): Carries impulses from the receptors on the retina to the brain (9): Tough, supporting wall of the eye. Bright Light responds to light. -schera (9) Circular Huscles contracted (Less light Retina (8) -Optic nerve (7) reflex: very bright light can damage the have a reflex to protect it you Ins lens to Pupil O Dim Light Radial Muscles Contraded смозе light E E Accomodation: The eye focuses light from different distances by changing its shape. Close objects: (close objects need More refraction as the enter the eye diverging instead of converging) Distant objects: 21 Chary (Distant objects need less refraction as enter the. parallet) they eyle in € Muscles con on the retina slackens the suspensory ligaments 2. Lens becomes fat which increases the amount it refracts light. Concave lens contract which • Ciliary muscles relax which makes the suspensory ligaments pull tight 12. lens becomes thin which refracts light less. Myopia: (shortsightedness) Close of objects are clear. Distanst objects blury. The light rays converge to quick so aren't focused on the retina. Caused when lens is too thick or eye is too long. are Convex, lens Causes light to I diverge before it Meets the eye Hyperopia : (Longsightedness) Close objects are blury. Distant objects are clear. The light...
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Alternative transcript:
rays converge too late and aren't focused on the retina. Caused by thin lenses or when eye is too long. Causes light to Start converging before it meets the eye Eyesight can be improved by: - Contact lenses = Comfortable (+), risk infection A -Laser eye surgery = accurate (t), expensive + risky () -Replacement lens surgery = Used for lots of diseases (+) ^ ()