IOE 333 Lecture Notes - Lecture 3: Color Vision, Dioptre, Visual Angle

• School: U of M
• Department: Industrial And Operations Engineering
• Course: IOE 333
• Professor: Clive D'Souza

Document Summary

Lens accommodates to bring to the image to focus on the back surface of the eyeball, the retina. If the image is close, the muscles make the image round. If the image is far, the muscles make the image flat. Amount of accomodation measured in diopters (viewing distance in m) Problems in light passing through: cataracts (opacity of the cornea), yellowing, color vision, deficiency, color blindness (protanopia) Visual angle in radians: va = 2arctan(w/2d) Va (arc-minutes) = va (degrees) * (60 minutes/degree) Vernier acuity: discern misalignment between two lines. Properties of receptor cells: rods and cones. Location: middle of the retina, the fovea, only has cones. Outside of the fovea, the periphery has both rods and cones, but less cones. Acuity: more detail is resolved when an image falls on closely spaced cones rather than sparsely spaced rods. Sensitivity: rods have more sensitivity, characterizes the threshold. Color sensitivity: only cones enable color vision, rods are color blind.