Glaucoma Screening Test
is a leading cause of blindness in the world. It is usually
a gradual, progressive eye disease with no pain or other symptoms.
Initially only peripheral (side) vision is lost. As such,
it often goes undiagnosed until the late stages when tunnel
vision prevails and vision is unfortunately almost lost.
Eye with abnormal optic disc cupping caused by glaucoma
Checking of eye pressure using applanation tonometry
lost to glaucoma cannot be restored. However, early diagnosis
and prompt treatment may bring glaucoma under control and
halt its progression.
Visual Field Screening Test
Start the test with the right eye. Cover the left eye with
a patch. You can make a patch simply by folding a piece of
paper and taping it with a tissue paper.
Position your right eye at a distance of 40 cm (16 inches)
from the screen. Wear your reading glasses if you need to
use them. Throughout the test, you will need to look directly
at the green cross in the center of the screen. If you are
correctly positioned, the red patch to the right of the center
green cross will disappear. This is the normal blind spot
present in all eyes. Now press the "start test" button. At
regular intervals, individual small white spots will flash
briefly at various points in your visual field. Press the
enter button once each time you can see a light. Your results
will be automatically shown after the test is completed.
Interpreting The Test Result
Your visual field screening test result is normal. Your visual
field screening test result is abnormal. You will need to
see an eye doctor for further evaluation. Please print a copy
of your test result and show it to your eye doctor.
Even if you have a normal screening test result, you should
still consider a visit to your eye doctor if you answer yes
to one or more of the following questions and if you last
full eye examination was more than 2 years ago.
to Eye Test Menu
- Are you over the age of 65?
- Have you noticed a change in vision over the last one year?
- Do you have diabetes?
- Do you have family members or close relatives suffering from
- Have you been told to suffer from raised eye pressures or
- Have you have a severe eye injury or major eye surgery done?
- If you answered yes to one or more questions, you should arrange
for an eye examination by your eye doctor.