Beta		MRI weighting that makes the vitreous appear black
Twenty		Light-sensing "third eye," found in the tuatara lizard, and used for dirunal activities
Xray		Method besides MRI for diagnosing optic neuritis
PET		Vitreous blood vessels in a bird's eye, which may function as a heat radiator
RPE		Type of imaging for oncology requiring isotope injection
TapetumLucidum		Type of membrane used to protect the eye used my snakes and some birds
T1		Where Hubel
EEG		The structure in the compound eye that connects the crystalline cone with retinula cells
Xanthylopsia		Cheapest, quickest way to image a fresh, hemorrhagic stroke
Euglenid		Number of cones per RPE cell at the fovea
Consciousness		According to Schwartz, this is a requirement for visual perception
Lipofuscin		Outermost functional layer of the retina (first of six)
Parietal		Single-celled organism with red pigmented eyespots next to a flagellum
StilesCrawford		The reflective membrane, or "carpet of light," on the back of nocturnal creatures' eyes
Pecten		Effect responsible for pointing the photoreceptors at the exit pupil of the eye
Nictitating		EEG brainwave of REM sleep and dreaming
Rhabdom		Aging pigment found in macular degeneration
Cortex		Chromatopsia caused by thiazide diuretics for hypertenstion