EXPLANATION OF RESULTS
The graph = The dotted lines
on the graph show the normal range of visual acuity scores for
children from newborn to 36 months old. The width of the stripes
is listed up the left side of the graph (on the Y-axis), with
thicker stripes near the bottom of the Y axis, and thinner stripes
near the top of the Y axis. Very small stripes, that an
adult with 20/20 vision could see, are represented toward the
top of the graph (around 32cycles/degree). We do not expect to
find that level of visual acuity until somewhere between the ages
of 3 and 5 years. The dotted lines on the graph are showing
the normal range of visual acuity scores for the different ages.
The bottom dotted line is the lower limit of the normal range
and the top dotted line is the upper limit of the normal range.
If the data point for a given child falls within the dotted lines,
that child’s score is in the normal range for their age.
Monocular Testing = Child was tested with
one eye at a time. Usually the right eye is tested first
(left eye patched), and then the left eye is tested (right eye
patched).
Binocular Testing =Child was tested with
both eyes open.
Patient’s Name = Name of child being
tested.
Test date = Date the child was tested.
Date of Birth = Date the child was born.
Age = Age of child in months ±2 weeks.
Cy/Cm = Cycles per centimeter refers
to the size of the smallest stripes seen by child. (Each
cycle is one black and one white stripe.)
Distance = Distance between child
and card (in centimeters). Usually this is 38 centimeters
for children 6 months of age and younger, and 55 centimeters
for children older than 6 months.
Cy/Deg = Cycles per degree also
refers to the size of the smallest stripes seen by child.
Each cycle is one black and one white stripe. Degrees refer to
degrees of visual angle. One degree of visual angle is about
the size of a thumbnail at arm's length.
Snellen = The Snellen scale is
the most common scale used to represent acuity. 20/20 is
normal vision in adults. The values represented here are
estimates of how the child would have scored on the Snellen scale.
It is important to remember that this is an estimation and not
a direct conversion. Snellen letter charts require a person
to recognize letters while this method only requires that the
child notices the stripes.
Confidence = Lower ratings are
often given if the child is fussy or sleepy during the test.
Tested with correction = Was the
child tested wearing glasses? |
