Checking to see if someone has a visual problem that
is affecting their reading/writing
( note I am not an optician, This is a biologists view of the issue)
If you are trying to help yourself
or someone else to understand if they have an unresolved but resolvable
visual problem which can make your dyslexia seem worse, or perhaps be the root cause
Then try the following.
Does
the person need glasses?
1.
Hold a pen in
front of one eye and close the other. Start with the pen about 10 cm in front
of the open eye.
a.
Move the pen
slowly back and forth
b.
If it is out of
focus and
i.
Gets clearer then
less clear as you move it to arms length, then… You have a short sight problem.
ii.
If it gets
clearer then stays clear, then…ok.
iii.
If it stays out
of focus even when your arm is outstretched, then…. the eye is probably longsighted.
2.
Try the other
eye. Same questions.
3.
If the two eyes
are different, for example .one long
sighted and one short sighted then you will probably suppress one ( and get easily distracted) when
reading.
This could
result in an eye turning sideways and getting a pain around one eye, after a period
of reading.
4.
The other possibility
is an astigmatism in one or both
eyes. Quite common but often not corrected if in one eye only.
An
astigmatism is slightly more difficult but not really hard to identify.
a.
Draw a large
capital L
on a page. About 5 cm tall and wide.
b.
Hold it in front
of one eye (the other eye closed) at the closest point at which the eye was
focussed.
c.
If the vertical
or the horizontal is fuzzy and the other is sharp then you have an eye ball with
an uncorrected astigmatism.
d.
Swap eyes and
test the other.
If uncorrected with glasses
then an astigmatism will slow down data collection from that eye. If one eye is
worse then the eye will be suppressed and may turn to one side, cause eye aches
and reduce reading stamina.
How will this affect dyslexia
in that poor visual data collection will make extra demands on already limited
working memory and make the situation unnecessarily / avoidably worse.
Also if the reading is slower
you have to hold the ideas/images in memory for longer time periods which will
stress working memory which can be considered as having a time limit as well as
a capacity limit. So the beginning of the sentence has ‘disappeared before you
get to the end of it.
5.
If both eyes very
short-sighted thus can be linked with the eyes finding it hard to ‘turn in’ to
prevent a sense of double-vision.
This will lead to the book
being needed to be gradually moved away from the face until it gets out of
focus. Often short-sighted people are very fast readers but only in short time
bursts with lots of rests/gaps needed.
6.
If an eye is
turning out for some reason, the head is often turned sideways, or it is
accompanied by head -shaking/fidgeting/..
Even if you have glasses, you may be suspicious of
whether they are correct. Following the above checks with your glasses on can
help you in deciding what to do next.
If you have problems then go back to the opticians?
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