SAS 2 Flashcards
(22 cards)
Definition: Normal Vision
A person is able to perform all close and distant visual tasks that are normally expected in his community.
Define: Blindness
no usable vision with exception of light perception. It as the state of being sightless.
Economic Blindness
visual performance with distance visual acuity of 6/60 or less in the better eye with best ophthalmic correction or as a defect in visual field so that the widest diameter of vision subtends an angle no greater than 20 degrees.
Legal blindness
an individual with vision impairment is eligible for government benefits.
Travel vision
When vision is 3/60 or better. Peripheral field of vision is at least 50 degrees in the widest diameter
Partially sighted child
One who has distance VA between 6/24 to 6/60 in the better eye with the best correction.
Visual function
ability to perform important task that require vision.
visual disorder
deviation from normal visual structure by disease, injury, anomaly affecting vision
visual impairment
reduction of visual function (ex in VA, VF, contrast sensitivity)
visual disability
reduced ability to do certain tasks ( to read, write, orientation, mobility)
visual handicap
It refers to non-performance of tasks related to individual .
It includes non-fulfilment of social expectation because of visual disability
vision rehabilitation
Are services provided to both who are partially sighted and those who are blind. These services include mobility training, adaptive skills training, low vision instruction
visual efficiency
refers to an individual functional visual ability in spite of loss. The use of low vision aids increases visual efficiency.
visual efficiency
refers to an individual functional visual ability in spite of loss. The use of low vision aids increases visual efficiency.
visual acuity
assessment of the eye’s ability to distinguish object details and shape, using the smallest identifiable object that can be seen at a specified distance
visual field
full extent of the area visible to the eye when looking straight ahead.
visual field loss
an area of vision loss in part of the usual visual field. Can occur due to disease or disorders of the eye, optic nerve, or brain.
residual vision
usable vision in an individual with congenital or acquired visual impairment. For example, an individual with impaired vision in the peripheral visual field due to glaucoma may still have residual vision in the central visual field.
visual enhancement device
permits this patient to perform such task beyond there visual capabilities
visual enhancement technique
may not use visual device but instead use their residual vision
visual substitution device
use of one or more sense other than sight ex. Talking watches
visual substitution technique
use of one or more sense other than sight ex.( with the use of senses other than sight
