Class Notes (835,108)
Canada (508,934)
Psychology (1,170)
PSYCO104 (388)

Vision 1

29 Pages
Unlock Document

Blaine Mullins

Psychology Chapter 4: Vision Chapter 4: Vision Chapter 4: Vision 1 Senses: Vestibular Sensation- sense of balance/upright (ear) CHEMICAL=TCS(skin)/Olafaction(smell)/Gustation(taste) chemical sensors SOMATIC=Mechanical(skin), Pain, Temperate Vision 2. Light Important properties of light 1. Length: Hue (or colour) 2. Amplitude: Brightness 3. Purity: Saturation (richness of colour) 2 1. Light Properties of light •Length: Hue (or colour) •Amplitude: Brightness •Purity: Saturation (richness) 3 Light Different wavelengths of light is our experiences of color- HUE=WAVELENGHTS Blue- 2100 nanometers 2. Anatomy of the eye • Cornea: covers iris & pupil protecting it from dust, etc. Acts as a lens, aiding in focus of light. • Lens: transparent structure focuses light. • Pupil: dark aperture in lens that determines how much light enters the eye. • Zonule fibers: ligament attached to & pulls on lens. • Aqueous humour: clear watery fluid secreted into anterior chamber. 4 Cornea- does most of refractive work (can tear with contacts). ZF- attached to lens, help us focus 2. Anatomy of the eye • Accommodation: adjustment of shape of lens to compensate for distance of object from retina. ‣ Zonule fibers: looking at something distant ‣ Elastic force in lens: looking at something close 5 -Focus on the back of eye ZF- pull on the lens, make it focus. Cillary muscles relax, XF flatten, inc focus EF- shorter distant, Cillary muscle contract and ZF thicken, 2. Anatomy of the eye • Vitreous humour: thick gelatinous substance between lens & retina. • Retina: layer of cells lining back of eye, detects light & sends signals to brain. • Macula: small spot on retina where acuity is very good. • Fovea: small pit w/n macula, only cones, best acuity. • Optic nerve: connects eye to brain. 6 AH-- watery, CH- more gelly, thin layer of cell at back of cells. Light energy transformed into neuron pulse. Fovea contains only cons- high visual acuity, see things in great detail. Where your looking. 2. Anatomy of the eye Taken June 04, 2011 from:,r:4,s:19&biw=1172&bih=517 7 Know the anatomy 3. Anatomy of the eye 8 9 2. Anatomy of the eye •Vitreal floaters: debris too large for phagocytic consumption. 10 Dead cells floating around cell. Casts a shadow- u detect shadow How far we can see depends on how far light travels. You can see as far as light can touch your cons- no limit. 3. The retina Rods Horizontal Bipolar Amacrine Ganglion Cones cells cells cells cells 11 RODS/CONS- photo receptors, last layer that light detects Gangl
More Less

Related notes for PSYCO104

Log In


Join OneClass

Access over 10 million pages of study
documents for 1.3 million courses.

Sign up

Join to view


By registering, I agree to the Terms and Privacy Policies
Already have an account?
Just a few more details

So we can recommend you notes for your school.

Reset Password

Please enter below the email address you registered with and we will send you a link to reset your password.

Add your courses

Get notes from the top students in your class.