My eye doctor tells me that 30% of the children put on attention deficit medication actually have eye issues and in particular convergence insufficiency. Does anyone have more information?
What is Convergence Insufficiency?
Insufficiency (CI) is a common binocular (two-eyed) vision disorder in
which the eyes do not work at near easily. An eye teaming
problem in which the eyes
have a strong tendency to drift
outward when reading or doing close
work (exophoria at near). If the eyes do drift out, the
person is likely to have double vision.
To prevent double vision, the individual exerts extra effort to
make the eyes turn back in (converge). This extra effort can lead to
a number of frustrating symptoms which interfere with the ability
to read and work comfortably at near.
"Convergence insufficiency (CI) is a common binocular vision
disorder that is often associated with a variety of symptoms, including
eyestrain, headaches, blurred vision, diplopia [double vision],
sleepiness, difficulty concentrating, movement of print while reading,
and loss of comprehension after short periods of reading or performing
Archives of Ophthalmology. 2008;126(10):1336-1349 What are the Symptoms of Convergence Insufficiency?
A person who has convergence insufficiency may show and/or complain of
the following while doing close work (i.e., reading, computer work,
deskwork, playing handheld video games, doing crafts, etc.):
eyestrain (especially with or after reading)
headachesblurred visiondouble visioninability to concentrateshort attention spanfrequent loss of placesquinting, rubbing, closing or covering an eyesleepiness during the activitytrouble remembering what was readwords appear to move, jump, swim or float
problems with motion sickness and/or vertigo
It is not unusual for a person with convergence insufficiency to cover or close one
eye while reading to relieve the blurring or double vision.
Symptoms will be worsened by illness, lack of sleep,
anxiety, and/or prolonged close work.
Many people who would test as having convergence
insufficiency [if tested]
may not complain of double vision or the other symptoms listed
above because vision in one eye
has shut down. In other words, even though both eyes are open
and are healthy
and capable of sight, the person’s brain ignores one eye to
avoid double vision. This is a neurologically active process
Suppression of vision in one eye causes loss of binocular (two-eyed)
vision and depth perception. Poor binocular vision can have a negative
impact on many areas of life, such as coordination, sports, judgment of
distances, eye contact, motion sickness, etc. Consequently, a person with
convergence insufficiency who is suppressing one eye can show some or all of
the following symptoms: trouble catching balls and other objects thrown through the air
avoidance of tasks that require depth perception (games involving smaller
balls traveling through the air, handicrafts, and/or hand-eye coordination, etc.)
frequent mishaps due to misjudgment of physical distances (particularly within
twenty feet of the person’s body), such as: trips and stumbles on uneven surfaces, stairs, and curbs, etc.frequent spilling or knocking over of objectsbumping into doors, furniture and other stationary objectssports and/or car parking accidents
avoidance of eye contactpoor posture while doing activities requiring near visionone shoulder noticably higherfrequent head tiltproblems with motion sickness and/or vertigo
If untreated, in some cases, convergence insufficiency can lead to an outward eye turn that comes and goe
I don’t know this but thank you for sharing this information. I’m sure not all the parents out there knows about this.This is good to share.