HMB200H1 Chapter Notes - Chapter 9: Receptive Field, Color Blindness, Alpha Helix
Document Summary
Cortex -> nourished by aqueous humour behind it. Macula -> mid retina; dark, yellow hue -> central vision -> no large blood vessels. Fovea -> dark spot, anatomical reference point, retina thinnest here -> central fovea. Lens suspended by zonule fibers attached to cilary muscles, attached to sclera. Between cornea and lens: aqueous humour -> watery. Between lens and retina; vitreous humour -> viscous, jelly-like. Striabismus -> exptropia, esotropia: one eye supressed amblyopic. Glaucoma increase in intraocular pressure leads to blindness. Retinis pigmentosa -> progressive degeneration of photoreceptors: unknown cause, tunnel vision. Detached retina -> retina pulls away from underlying eye wall. Macular degeneration ->loss of central vision: no known cure. Hyperopia -> light focuses behind retina -> convex -> eye too short (far-sightedness) Myopia -> light focuses in front of retina -> concave -> eye too long (near-sightedness) Astigmatism curvature and refraction in horizontal and vertical axis is different.
