The eye – curved cornea – lens – retina – fovea – optic disk Using Light
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- Slide 1
- The eye curved cornea lens retina fovea optic disk Using
Light
- Slide 2
- photoreceptors transduce incoming light ganglion cells send
signals along to the brain The Retina has layers of cells
- Slide 3
- 2 types of photoreceptors: rods and cones rods are very
sensitive - useful in dim light Two kinds of Photoreceptors
- Slide 4
- Rods and cones are distributed differently across the retina
The Retina
- Slide 5
- visual acuity (ability to see detail) depends on cones - thus
acuity varies across the visual field The Retina
- Slide 6
- Why dont you notice your blind spot? The Retina
- Slide 7
- Why dont you notice your blind spot? Blindspots dont overlap!
Your brain fills in the missing information The specific
information in the blindspot isnt much more missing than the rest
of the periphery! The Retina
- Slide 8
- three types of cones: short, medium, and long different
absorptions enable color vision The Retina
- Slide 9
- Ganglion cells project to the brain via the optic nerve
information is projected to contralateral cortex! Visual
Pathways
- Slide 10
- Seeing Depth Whats the big problem with seeing depth ?
- Slide 11
- Seeing Depth The world is 3D, the retina is 2D !
- Slide 12
- Depth Cues Four categories: 1. Pictorial 2. Physiological 3.
Motion 4. Stereoscopic
- Slide 13
- Depth Cues Pictorial Depth Cues: aspects of 2D images that
imply depth
- Slide 14
- Depth Cues Pictorial Depth Cues: aspects of 2D images that
imply depth Physiological Depth Cues: Proprioception in ocular
muscles indicates accommodation and convergence
- Slide 15
- Depth Cues Pictorial Depth Cues: aspects of 2D images that
imply depth Physiological Depth Cues: Proprioception in ocular
muscles indicates accommodation and convergence Motion Depth Cues:
foreground and background move in opposite directions
- Slide 16
- Depth Cues Pictorial Depth Cues: aspects of 2D images that
imply depth Physiological Depth Cues: Proprioception in ocular
muscles indicates accommodation and convergence Motion Depth Cues:
foreground and background move in opposite directions Stereoscopic
Depth Cues: disparity between two retinal images indicates
distance
- Slide 17
- Pictorial Depth Cues Occlusion
- Slide 18
- Pictorial Depth Cues Occlusion
- Slide 19
- Pictorial Depth Cues Shadows and Shading
- Slide 20
- Pictorial Depth Cues Shadows and Shading
- Slide 21
- Pictorial Depth Cues Shadows and Shading: visual system assumes
light from above
- Slide 22
- Pictorial Depth Cues Shadows and Shading: visual system assumes
light from above
- Slide 23
- Pictorial Depth Cues Shadows and Shading