PSY 200 - Sensory Perception: Vision

Audition

hearing

Olfaction

smell

Gustation

taste

Somatosensation

touch

Vestibular Sense

balance

Proprioception

body position

Kinesthesia

movementno

Nociception

pain

Thermoception

temperature

Interoception

organ sense

Distal Stimulus

object to be perceived

Proximal Stimulus

patterns of stimuli from these objects and events that actually reach your senses

Perception

the process of organizing and interpreting sensory info, enabling us to recognize meaningful objects and events

4 Parts of a Sensory System

• Sense Organ

• Receptor Cells

• Sensory Nerves

• Brain Area

Visible Spectrum

the part of the electromagnetic energies to which the eyes respond

Hue

various colors of light that correspond with wavelengths of the light that reaches our eyes

Saturation

the purity of the hues

Human Eye Parts

• Cornea

• Lens

• Iris

• Pupil

• Retina

• Fovea

• Optic Nerve

• Blind Spot

Cornea

frontmost clear window of the eye; bends light inward to help focus

Lens

located behind the pupil; adjust curvature to focus light on the retina

Iris

the colored part of the eye that regulates the amount of light entering the eye

Pupil

an aperture or opening in the center of the iris through which light passes

Retina

the light-sensitive layer that covers your eye’s rear surface

Fovea

a small depression in the retina; contains cone photoreceptors

Optic Nerve

a bundle of about 1.2 million nerve fibers that transmit visual info to the CNS

Blind Spot

results from a lack of photoreceptors at the location where optic nerve exits the eye

Photoreceptors

converts light into electrical impulses that are sent to the brain through the optic nerve

Cones

responsible for daylight and color vision as well as visual acuity

Rods

mainly responsible for low-light vision and night vision

Myopia

nearsightedness; objects that are closer are seen more clearer than objects further away

Hyperopia

farsightedness; distant objects are more clear than near objects

Astigmatism

caused by a cornea or lens that has a different shape than normal, resulting in multiple focal points of light

Presbyopia

a normal part of aging that becomes more apparent as people approach their 40s and 50s

Cataracts

cloudy areas that form on the lens of the eye

Protanomaly

issues with red cones

Protanopia

no red cones

Deuteranomaly

issues with green cones

Deutoranopia

no green cones

Tritanomaly

issues with blue cones

Tritanopia

no blue cones

Blue Cone Monochromacy

no red or green cones, only blue

Achromatopsia

rod monochromacy; no functional cones and cannot see any colors