Luminance distribution in the visual field is considered as one of causal factors with a significant influence on visual fatigue, especially for intensive and extended Video Display Terminal (VDT) work. The aim of the study was to define visual fatigue of VDT operators for different values of surrounding luminance. Experiments were carried out in laboratory conditions under 3 lighting condition...

The phenomenon of fixation disparity is of interest in the study of fusional processes in patients with single binocular vision. An understanding of its mechanism is of im­ portance in the pathogenesis of strabismus. The clinical determination of the amount and type of fixation disparity relative to its practical clinical and therapeutic implications has been discussed elsewhere. The present st...

The feature of Horopter was studied allready since the arabic and persian school, where Aguilonius defined it in 1613 for the first time. From those times til now, horopter was investigated as a geometrical feature, but also as a physiological feature of single vision. In general, there is the geometrical or theoretical horopter (Vieth, G. 1818, Muller, J. 1823) and the empirical horopter (Whea...

PURPOSE To determine the effectiveness of vision therapy among Korean elementary school children with convergence insufficiency. METHODS A total of 235 elementary schoolchildren, 10.13 ± 2.45 years of age, were subjected to thorough eye examination including binocular vision testing. Of them, 32 individuals with symptomatic convergence insufficiency without strabismus, amblyopia, and ocular d...

As the population of elderly increases, management of patients with cataract is becoming an issue of increasing importance. Progress in surgical equipment and techniques has increased the safety of cataract surgery, and the insertion of an intraocular lens at the time of surgery has ensured many patients of good postoperative visual function. The mainstay of current cataract treatment is surger...

background: vision therapy/orthoptics(vt/o) is a package of treatments that enables patients to achieve the maximum level of visual performance.the aim was to determine the effect of three months vision therapy/orthoptics on best corrected visual acuity (bcva), fusion, stereopsis and ocular alignment in 3-7 year old children. materials and methods: in this randomized clinical trial study, 80 ch...