Vision Impairment Flashcards
Children with undetected and untreated vision problems may have difficulty participating in many occupations such as
Reading
Copying from the board
Writing
Playing
Sports
What is visual acuity?
A measure of the resolving power of the eye
Ability to see fine detail
How is visual acuity often measured?
An individual with 20/20 acuity is considered to have normal ability to see small details at the distance tested. The numerator refers to the testing distance at which the child recognizes the stimulus, and the denominator refers to the distance at which the letter being viewed could be identified by a child with normal visual acuity. For example, 20/20 implies that a child with normal visual acuity could identify the letter presented at a distance of 200 feet
What is myopia?
a condition in which the length of the eye is too long and a child has clear vision when reading but blurred vision when looking at a distance. Myopia is easy to detect even without a vision examination because b/c the child will simply say “I can’t see the TV” or “I can’t see the board”
What is amblyopia?
a condition in which the visual acuity is less than 20/20 in one eye in spite of the fact that the eyes are healthy and the child is wearing glasses that correctly compensate for any refractive error.
What are pursuits?
eye movements enable continuous clear vision of moving objects. This visual following reflex ideally produces eye movements that assure continuous foveal fixation of objects moving in space.
What are saccades?
A saccade is an eye movement in which a child looks from one stationary object to another. The ideal saccade is a single eye movement that rapidly reaches and abruptly stops at the target of interest.
What is strabismus?
cross eyes
What are the 2 primary models of vision?
The 3 component model and the 1 component model
What does the 3 component model of vision cover?
Visual integrity
Visual efficiency
Visual information processing
What does the 1 component model of vision cover?
Visual integrity
What are the 3 eye care professions?
Optician
Optometrist
Ophthalmologist
What is an optician?
The optician is the individual who helps a person select an appropriate eyeglass frame, prepares the lenses based on the prescription, and then fits the frame to the person’s face so that they can be comfortably worn. The optician does not have the training to perform any clinical testing or treatment.
What is an optometrist?
The optometrist is taught to evaluate the visual system in a manner that allows diagnosis of visual conditions that can interfere with performance and affect the quality of life.
What is an ophthalmologist?
Ophthalmologists must complete many more years of training than optometrists and opticians. As a result, ophthalmologists can diagnose and treat a wide range of conditions.
