Abstract
Convergency insufficiency is typical symptoms such as blurring of distant vision, reexamination of near vision, jumping words and walking while reading, visual fatigue and so on after reading or working closely for a period of time, According to the corresponding symptoms and signs, visual function tests were carried out, such as far and near eye position, accommodative response (BCC), positive relative accommodation (PRA), negative relative accommodation (NRA), near point of convergence (NPC), accommodation amplitude (AMP), etc., The detected visual function data were evaluated according to the normal value of Morgan and Sherad criteria. In daily life, people not only require clear vision, but also pay great attention to the comfort of using eyes, and the convergency insufficiency has become one of the important factors hindering the clarity, persistence and comfort of vision. Making binocular vision system to produce the cognition of regulation, convergence and eye movement through various methods such as optics, psychology and physics, vision therapy improves the application ability of eye vision system, and finally cures visual function problems such as visual fatigue, adjustment and convergence abnormality. We review the incidence, pathogenesis, new progress in the treatment of convergence insufficiency, the mechanism of visual formation and the basic principles of visual training.
Highlights
Convergency insufficiency is typical symptoms such as blurring of distant vision, reexamination of near vision, jumping words and walking while reading, visual fatigue and so on after reading or working closely for a period of time [1,2], According to the corresponding symptoms and signs, visual function tests were carried out, such as far and near eye position, accommodative response (BCC), positive relative accommodation (PRA), negative relative accommodation (NRA), near point of convergence (NPC), accommodation amplitude (AMP), etc
The pathogenesis of convergency insufficiency may be related to extraocular muscles and regulation, and the main treatment is visual training
Because the domestic ophthalmology pays less attention to the accommodation and convergency of visual function, the report of abnormal visual function is rare, so, it is of great significance to examine the visual function of the patients and give them substantive treatment opinions
Summary
Convergency insufficiency is typical symptoms such as blurring of distant vision, reexamination of near vision, jumping words and walking while reading, visual fatigue and so on after reading or working closely for a period of time [1,2], According to the corresponding symptoms and signs, visual function tests were carried out, such as far and near eye position, accommodative response (BCC), positive relative accommodation (PRA), negative relative accommodation (NRA), near point of convergence (NPC), accommodation amplitude (AMP), etc. According to the abnormal visual function of patients, a series of theories and methods such as neurobiology, psychophysics and computer vision are applied to train from the aspects of vision, accommodation, collection and eye movement. Convergency insufficiency is more common, Scheiman et al [9] found that 5.3% of the patients in their study had the problem of insufficient collection. Among the 81 patients studied, the incidence of abnormal convergency reached 35.80%, of which convergency insufficiency accounted for the main proportion. Liu Ruilin [16] had conducted a study on 81 adult myopic patients who came to his hospital and found that 41 of them had abnormal visual function, accounting for 50.62%, and the incidence of abnormal collective function reached 34.56%. The problem of convergency insufficiency will seriously affect their learning, mainly for lack of concentration, and at the same time interfere with the daily life of adults
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