The Human Eye (Grade 12 NSC Matric Life Sciences): Flashcards
📚Flashcards
Practise the cards
10 cards from this deck
ShowHide
Practise the cards
10 cards from this deck
Rods function
Rods function
Detect dim light; black & white vision
Cones function
Cones function
Work in bright light; colour vision
Cornea function
Cornea function
Transparent & convex; refracts light
Yellow spot feature
Yellow spot feature
Highest cone concentration; sharpest vision
Blind spot cause
Blind spot cause
Optic nerve exits; no rods/cones
Lens shape for near objects
Lens shape for near objects
More convex; ciliary muscles contract
Lens shape for distant objects
Lens shape for distant objects
Flatter; ciliary muscles relax
Pupil in bright light
Pupil in bright light
Constricts; less light enters
Stereoscopic vision enables
Stereoscopic vision enables
3D images; judge distance & depth
Myopia: light focus point
Myopia: light focus point
In front of retina; distant objects blurred