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PSYCHOLOGY #2

TermDefinition
VISUAL SENSORY SYSTEM Consists of the complete network of physiological structures involved in vision.
CORNEA a transparent, convex-shaped covering, which protects the eye and helps to focus light rays onto the retina at the back of the eye.
PUPIL It is not a structure in itself , but an opening in the iris that helps control the amount of light entering the eye.
IRIS A ring of muscle which expands or contracts to change the size of the pupil and control the amount of light entering the eye.
LENS s a transparent, flexible, convex structure located immediately behind the pupil. It focuses light onto the retina.
CILIARY MUSCLE Attached to each end of the lens. These muscles expand and contract, enabling the lens to automatically bulge to focus nearby objects onto the retina and flatten distant objects onto the retina.
RETINA Receives and absorbs light, and also processes images. It flips the images we see that are initially upside down.
PHOTORECEPTORS Light-sensitive visual receptor cells inside the Retina. There are two types of photoreceptors - RODS & CONES
RODS Respond to very low levels of light and are primarily responsible for night vision. They are very poor at detecting fine details of an image and do not see colour.
CONES Respond to high levels of light . Primarily responsible for our vision in well-lit conditions & detecting fine details in images . They see in colour.
OPTIC NERVE Transmits the visual information from the retina to the primary visual cortex.
BLIND SPOT There are no photoreceptors (rods or cones) on that small area of the retina so light cannot be detected there. Any image focused on this spot will not be visually processed and unseeable.
PRIMARY VISUAL CORTEX Receives neural information and interpretation occurs here and in other parts of the brain.
VISUAL PERCEPTION PRINCIPLES Rules that we apply to visual information to assist our organization and interpretation of the information inconsistent and meaningful ways.
Created by: ebony.odonohue
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