Vision & Vision Disorders

eye

• the whole eye!
• a specialty doctor

• non-medical doctor
• tests eyes for defective vision only
• prescribes corrective lenses only

• They don't care for the eyes.
• they only read prescriptions and make the corrective lenses.

using both eyes together

• A system of 6 embossed dots called cells
• 3 dots length wise (up/down
• 2 dots width wide (left/right)

• eye disease
• increased intra-ocular pressure

• The circular colored membrane
• behind the cornea
• perforated by the pupil

• fibers that keep the lens of the eye in place
• contraction and relaxation of the fibers allow accommodations of the lens

excessive bilirubin in the blood.

• yellowing of the whites of the eyes
• yellowing of skin

nearsightedness

continual rolling movement of the eyeballs.

abnormal intolerance to light

• a defect in the curvature of the eye
• results in blurry vision

The photosensitive nerve layer of the eyes.

• Disease of retinal degeneration
• progressive blindness
• starts with night blindness in adolescence or adult life

Tumor of the retina

eye disease of premature infants

visual screening chart used at schools in regular doctor's offices

measures visual acuity at 20' from the chart

• lack of coordination of the eye muscles
• characterized by squinting or crosseyedness

the ability to pick out a word, letter, or group of words on a page

organizing process where one is able to relate to concepts visually presented

can identify a visual stimulus from an incomplete visual presentation

ability to visually differeniate letters and words

• ability coordinate vision with body movements
• to complete tasks

idenitification, organization, interpretation of visual data through the eyes

ability to retain a sequence of what is seen

ability to distinguish a form or pattern against a distracting background.