Pupil		A light-sensitive pigment found in the rod cells that is formed by retinal and opsin.
Fovea		Bending of light rays.
Cones		Conversion of environmental energy into impulses.
Zygote		specialized cells of the retina found predominantly in the fovea and more sparsely throughout the retina.
Rods		Theory where each cone contains 1 type of photo pigment
Sclera		Adapting one's current understandings (schemas) to incorporate new information.
Rhodopsin		in the eye, a circular opening in the iris that expands and contracts, varying according to the intensity of light present
Transduction		a small area in the central part of the retina, packed with cones; the most sensitive part of the retina for detail vision
Refraction		A genetically inherited dominant trait that involves an inability to metabolize the amino acid, phenylalanine. Treated with dietary restrictions
Accommodation		Contain rhodopsin or "visual purple”.
Schemas		Theories about how the physical and social worlds operate.
Operation		Sperm cell and egg
Trichromatic		A mental routine for separating, combining, and otherwise transforming information in a logical manner.
JMD		Just Noticeable Difference.
trisomy-21		Known as the white or white of the eye, is the opaque, fibrous, protective, outer layer of the eye
Phenylketonuria		condition in which an individual has three number 21 chromosomes, resulting in Down syndrome