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Richmond Eye Associates
Eye Health and Disorders
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Vision Tests:
This page contains two downloadable and printable vision tests, and one test to be done
on the computer monitor without printing.
Read this important information
before proceeding further:
These sections are not intended to replace the professional examination and
diagnosis by a physician or eye care provider, and they are presented here purely for
informational purposes. The availability of these vision tests should not be taken as a
recommendation to self-diagnose or self-treat a condition. A misdiagnosed or improperly
treated eye condition can result in a permanent loss of vision, or a permanent loss of
function of the eye or visual system. In the case of any eye problem, seek medical
attention promptly. This can include emergency room treatment, as well as treatment by a
medical physician or eye care provider.
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Vision Tests Include:
Distance Vision Test - Printable
This is a test of the distance visual acuity using the "E Game". This test
can be performed by adults as well as children. Below are instructions on how to print and
administer the test. While this vision test is felt to be accurate, it does not substitute
for vision tests given by a health care professional or eye care professional. Due to
differences in monitor size and resolution, this test is not accurate when read from a
computer monitor or television. Also, due to differences in printer resolution and setup,
there can be variations in the appearance of the test. Included is a calibration bar that
can be measured to determine that the letters are of the correct size.
VIEW and PRINT the Distance Vision Test here.
When printing, the following settings should be used in the printer setup, as available:
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The page should be centered vertically and horizontally.
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The size of the image should be kept the same, not enlarged to fill the page.
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Print as portrait, not landscape.
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The graphics type should be monochrome (black and white), and print resolution set to
"high".
Before the test is administered, check that the length of the calibration line is 100
millimeters (3 15/16 inches). If the distance is 100 mm, then the 10 foot testing distance
is accurate. If it is different than 100 mm, the testing distance will have to be altered
in order to give the proper visual acuity result. See below to
adjust the
test distance.
The test should be given in good light. The printed eye chart should be placed upright
on a wall, and the testing distance should be measured exactly (10 feet, or as determined
below). The person taking the test should stand at the testing distance. The person taking
the test should cover one eye at a time. The lowest line that can be read correctly is the
visual acuity for that eye. Note that since only the 20/20, 20/40, 20/100, and 20/200
lines are represented, a person's visual acuity could fall between the levels represented.
(For example, if the 20/40 line could be read, but not the 20/20 line, the vision is at
least 20/40, but could also be 20/30 or 20/25.)
When testing children, make sure that the covered eye is truly covered. Since peeking
through fingers is possible, it is more reliable to place an opaque object over the eye
that is not being tested. For variation, the chart can be turned upside-down, or sideways.
Adjusting the Test Distance if the Calibration Line is not 100
millimeters:
The distance that one should stand in inches from the test chart can be calculated by
multiplying the length of the calibration line in millimeters by 1.2:
Test Distance in Inches = Calibration Line Length in Millimeters X 1.2
Thus, if the calibration line is 100 mm, then the person taking the test should stand
100 mm X 1.2 = 120 inches, or 10 feet, from the chart..
Return to Topic List
Amsler Grid - printable
The Amsler Grid is useful for monitoring the function of the macula, or the central
area of vision. Certain disorders, such as macular degeneration, can lead to distortion of
the retina due to hemorrhage or swelling. This leads to distortion of the visual image
perceived by that area of the retina (much like camera film that is wrinkled in the camera
will give a distorted photograph). In many cases, a person can monitor their vision with
an Amsler Grid to check for distortion, blind spots, or changes in previously existing
abnormalities. Some conditions that are monitored with an Amsler Grid include:
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Age-related Macular Degeneration (ARMD)
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Drusen (deposits) present in the macula
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Ocular Histoplasmosis Syndrome (OHS or POHS)
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High Myopia (nearsightedness) with retinal degeneration
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Plaquenil (hydroxychloroquine) or Chloroquine use (a drug used for rheumatological
conditions)
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Central Serous Choroidopathy
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Cystoid Macular Edema
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Many others
VIEW and PRINT the Amsler Grid here. When printing, the
following settings should be used in the printer setup, as available:
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The page should be centered vertically and horizontally.
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The size of the image should be kept the same, not enlarged to fill the page.
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Print as portrait, not landscape.
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The graphics type should be monochrome (black and white), and print resolution set to
"high".
The grid should be approximately 4 by 4 inches after printing.
To use the grid, place it in a visible location with good lighting, such as on the
refrigerator. With one's normal glasses correction for reading (reading glasses or
bifocals if needed), view the grid, one eye at a time, at normal reading distance. Look at
the central dot. As the dot is visualized, and without moving the eye, note whether or not
there is any distortion or breaks in the lines of the grid. Also note if the dot, part of
the dot, or if any of the lines disappear. Blurred or double images might not necessarily
be abnormal. The use of progressive, lineless bifocals may introduce some distortion in
the grid. After one eye is checked, check the other. The whole process may take only 10
seconds. Check the grid daily, or as often as recommended by the treating physician.
If a change is noted on the Amsler Grid, such as new distortion or blind spots,
notify the treating ophthalmologist immediately (the same day).
Return to Topic List
Color Vision Test
Approximately 8% of males and less than 1% of females are born with an inherited type
of color blindness, known as "red - green" color blindness. In this disorder,
there may be confusion in distinguishing certain hues from one another. For example,
certain reds, browns, olives and golds may be confused. However, pure red would be easily
distinguished from pure green, in this particular type of color blindness. There are many
varieties and degrees of color blindness, and this color vision test only pertains to the
most common type, the inherited red - green type of color blindness. This test may not be
accurate due to the wide variety in the ways colors are displayed on different monitors
and with different internet browsers. Certainly, it would be doubtful that a printer would
display the colors correctly, so it is not recommended to print the test to take it. An
individual's eye care provider can test color vision most accurately.
When taking this color vision test, look for a number in each figure. Observe the
computer monitor at a normal distance and with glasses, if necessary. The eyes can be
tested separately, or together. After taking the test, return to this page to see the
answers displayed.
View the Color Vision Test here.
Note: This tests consists of
8 images ranging from 25K to 53K each, so there will be a
moderate download time. This has been tested and felt to be accurate on Netscape 4.0 and
higher, and in MSIE 4.0 and higher. The AOL MSIE browser tends to give poor color
reproductions.
View the Color Vision Test Answers here.
Missing a few of the numbers may be normal, but missing the majority of the numbers may
indicate a color vision abnormality.
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