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The Eye and the Brain



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4 Tiny spot on the retina where there are a higher concentration of cones and where light is focused on (cental gaze)
5 Outside part of the brain, over 50% of which is devoted to vision
9 Long-sighted, the power of the eye's optical system is insufficient to focus the light on the retina
10 The part between the optic nerves and the brain hemispheres
12 Neurons in the retina that send their info to the LGN via the optic nerve
13 Liquid between the cornea and the pupil that aids in refracting the light towards the retina
15 The outer layer/front part of the eye, the first and most powerful lens in the eye's optical system
17 The ciliary muscle changes the shape of the lens
19 20:20 vision, the power of the eye's optical system matches its length
20 A bit between the eyes where the optic nerves from both eyes cross/converge
24 The blind spot in our vision + the entrance to the optic nerve
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1 Light travels faster through the air than through the cornea which makes it bend
2 Part of the retina where there are a higher concentrations of rods
3 Part of a camera that controls how much light enters the camera (pupil/iris)
6 the pathway between the optic chiasma and the brain.
7 having an outline or surface that curves inwards like the interior of a circle or sphere
8 Rods and cones on the retina
11 What happens to your rods if there is too much light that they are used to
14 Light sensitive part at the back of the eye - an extention of the central nervous system that converts light rays into electrical signals and sends the to the brain through the optic nerve
16 Photoreceptor that allows us to see black and white (only 1 type) - low resolution, high sensitivity
18 Less powerful than the cornea, but works with the ciliary muscle to be adjustable (accommodation) - this is how we focus
21 having an outline or surface curved like the exterior of a circle or sphere
22 Coloured bit of the eye that controls how much light gets in - also responds to strong emotions
23 Short-sighted, the lens/optical system is more powerful than is needed to focus light on the retina or the eyeball is too long
25 Does not change shape, but appears to grow and shrink due to the iris expanding and contracting
26 Photoreceptor that allows us to see colour (3 types: red, green, blue) - high resolution, low sensitivity
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