HUMAN VISION. The Eye Light WAVE PARTICLE Physics of the Eye’s lens.

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Presentation transcript:

HUMAN VISION

The Eye

Light WAVE PARTICLE

Physics of the Eye’s lens

Parallax Lab Although each eye alone gives focus, together, they provide you with depth perception. How?

Parallax

Light WAVE PARTICLE

Rods and Cones

Color Spectrum and Photopsin Cone typeNameRangePeak wavelength [1][2] [1][2] S (OPN1SW) - "tritan", "cyanolabe"OPN1SW β400–500 nmnm420–440 nm M (OPN1MW) - "deutan", "chlorolabe"OPN1MW γ450–630 nm534–545 nm L (OPN1LW) - "protan", "erythrolabe"OPN1LW ρ500–700 nm564–580 nm Different opsins differ in a few amino acids and absorb light at different wavelengths as retinal-bound pigments.amino acidswavelengths

Primary Colors Lab The definition of a “primary color” is that no combination of other colors can be used to make it. Why is this a bad definition? Given markers and top materials, experimentally verify all types of primary colors and explain how your results reflect the known properties of photopsin.

Primary Colors of Light and Pigment

Colorblindness Normalprotanopiadeuteranopiatritanopia All three cone typesAbsence of red receptor Absence of green receptor Absence of blue receptor

Humans vs. Animals Honeybees, bumblebees, and many butterflies

Illusions Lab (Discussion) Why do you think we experience the following as optical illusions?

optical illusions dex.html dex.html

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