What is LOW VISION?
Low Vision is a bilateral impairment to vision that significantly impairs the functioning of
the patient and cannot be adequately corrected with medical, surgical, therapy, conventional eyewear or contact
What are symptoms of LOW VISION?
It is often a loss of sharpness or acuity but may present as a loss of field of vision, light
sensitivity, distorted vision or loss of contrast.
What are the causes of LOW VISION?
Children as well as adults can be visually impaired, sometimes as a result of a birth defect or an
injury. Low vision is mostly a problem that afflicts seniors. Aging process like macular degeneration or
distorted and/or blurred from Diabetic Retinopathy are a few causes along with glaucoma or Retinitis Pigmentosa
can lose their peripheral vision and have difficulty seeing at night.
Vision loss can be very traumatic, and leads to frustration and depression.
What happens in Low Vision Examination?
The Low Vision Examination begins with a complete history. Special emphasis is placed on the
functional problems of the patient including such items as vision to read, functioning in the kitchen, glare
problems, travel vision, the workplace, television viewing, school requirements, etc. It will also include a
careful review of your ocular and medical history.
Preliminary test may include assessment of ocular functions such as depth perception, colour
vision, contrast sensitivity, curvature of the front of the eye. Careful measurements will be made of the visual
acuity using low vision test charts followed by low vision refraction. Low vision test charts include a larger
range of letters to more accurately determine a starting point for measurement of low vision. Low vision
refraction determines the measurement of the patient's prescription by special techniques which may include
changing the lighting levels, testing through filters and using larger changes which may be easier for you to
If the patient has decreased acuity, the doctor may test with various telescopic systems
which magnify distance vision. These may be spectacle mounted or handheld. He may also assess your response to
filters to control glare, Various reading aids including strong reading eyewear, magnifiers, electronic
magnifiers and even electronic reading machines may be tested.
Visual fields are usually evaluated and if the patient has reduced visual fields, field
enhancing devices may be evaluated and simple therapies to improve the patient's use of their residual field may
Eye health testing will include a bio microscopic examination of the external eye structures
and a dilated internal examination of the retina. Glaucoma tests are performed.
The Optometrist at GANGAR EYENATION will counsel you on how your condition will affect your
vision and what you may do to enhance and protect your vision. Independent living aids may be reviewed to fit
specific patient problems.
How does LOW VISION SERVICES CURE?
Low Vision services do not cure the cause of the vision problem
but rather utilize the remaining vision to its fullest potential. Low vision care does not replace the need for
other concurrent treatments such as laser, medication and surgery. Low vision specialists prescribe prescription
eyewear, filters, microscopic-telescopic eyewear, magnifiers, adaptive equipment, closed circuit television
systems, independent living aids, training and counsel patients.