Biology flash cards 3.0 / 5 based on 2 ratings ? BiologyGCSEOCR Created by: AmyCreated on: 17-10-12 21:32 Iris controls how much light enters the pupil 1 of 9 cornea refracts/bends light into eye 2 of 9 lens refracts light focusing it on the retina 3 of 9 the retina light sensitive part covered in receptors called rods and cones which detect light 4 of 9 rods sensitive to dim light but can't sense colour 5 of 9 cones sensitive to different colours but not to good in dim light 6 of 9 red/green colour blindness lack of certain specialist cone cells 7 of 9 optic nerve carries impulses from receptors to the brain 8 of 9 long sighted unable to focus on near objects 9 of 9
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