In some cases, there may be a connection with convergence insufficiency
The 15-question pencil-and-paper Convergence Insufficiency
Symptoms Survey (CISS) questionnaire was completed during each data collection session by selecting the frequency of the particular near vision symptom (Figure 2).
On orthoptic examination, 27% patients had exophoria for near convergence, 50% had convergence insufficiency
or decreased convergence amplitude, and 23% had esophoria [Table 10].
13% of fifth and sixth grade children examined during visual screening had the disorder of convergence insufficiency
as did nearly 1 in 5(17.
The study by the NEI found that in-office vision therapy was the best treatment for one type of problem convergence insufficiency
This is called convergence insufficiency
, which can cause eye strain, headaches, blurred and double vision.
The subjective measurement of the near point of convergence and its significance in the diagnosis of convergence insufficiency
The Mayo Clinic in Rochester, Minnesota, does work with convergence insufficiency
According to two separate studies, there is a "high occurrence" of convergence insufficiency
(CI), a vision disorder that causes the eyes to move outward, among children with attention-deficit/hyperactivity disorder (ADHD).
Watching 3D imagery, which creates the illusion of depth by presenting each eye with a slightly different image, can unmask ulterior issues such as lazy eye, convergence insufficiency
, poor focusing skills and other visual problems students might not have previously known existed.
Questionnaires exist to allow practitioners to quantify symptoms of convergence insufficiency
An NPC of greater than 8 cm was classified as convergence insufficiency