Week1 Flashcards
(37 cards)
Fixation
ability to maintain focus on object, cranial n involvment
Saccades
ability to perform quick movements from one target to another;
convergence
ability og both eyeys to move medially during task
accomdationq
3 step process that allows adjustment of the optics of the eye to keep an object in focus on the retina as its distance from the eye varies
CN III - oculomotor
tracking and pursuits
Ability to smoothly follow a allow moving target and keep it in the central vision
Visual Attention and Scanning
Ability to visually direct attention within all visual fields and search the environment (includes intra- and extrapersonal space) crosses over into visual fields
diplopia
double vision
Can present both horizontally and vertically
Functional signs
overreaching , squinting, closing one eye
accommodative insufficiency
The amount *of accommodation available (amplitude) is less than expected for the individual’s age
Clients often complain of
Blurred vision
Excessive blinking
Swirling or moving print
Headache or eyestrain or fatigue
Light sensitivity
Strabismus
misalignment of eyes by direction, freq, laterality and commitancy
Exotropopia
outward turn of eye
esotropia
inward turn of eye
hypertropia
upward turn of eye
hypotropia
downward turn of eye
converygence insufficiency
inInability of eyes to work together when looking at nearby objects; one eye will drift outward when engaged in near focused work
visual field loss
Loss of vision within any of the visual fields
Space one is able to see when looking straight ahead
Homonymous hemianopsia
Loss of part of the entire half of the visual field
photophobia
Photophobia
Sensitivity or discomfort to light
Visual perceptual disorders definition
difficulty identifying and recognizing familiar objects and people despite intact visual anatomical structures
Prosopagnosia
Inability to identify familiar faces
most often due to right hemisphere damage
Simultanagnosia
inability to interpret image as a whole; right hemisphere damage;
Metamorphopsia
Distortion of physical properties; objects appear bigger, smaller heavier or lighter than they are
color agnosia
inability to identify/remember appropriate color
visual spatial disorders
difficulty accuraclty interpreting the spatial relationship between their bodies, and objects in the environments; right parietal lobe damage
Right -left discrimination
Inability to use concepts of left and right