Detection vs. Interpretation

Transduction

Vision

Environmental Energy: Electromagnetic Radiation

Major Structures of the eye:

Cornea

Aqueous Humour

Iris

Pupil

Lens

Vitrieous Humour

Retina

Fovea

Optic Nerve

How do Rods and Cones Differ?

Cones

color vision

Need bright light to operate

See details (high visual acuity)

Rods

peripheral vision

operate well in dim lighting

low visual acuity

 

Rods and Cones also differ in their rate of convergence

Implications for light sensitivity and acuity

 

Three Theories of Color Vision

Trichromatic Theory

3 Types of Cones

Red, Green, Blue

Opponent Process Theory

Red -Green

Blue -Yellow

Black-White

Retinex Theory

color constancy