This paper confer the reasons for color vision defects in human eye. This paper also discuss the design and development system for the people who are having problem in their visual system, such as color blindness, low vision, or visual field defects. A new model has been proposed that examine the color vision, vision field defects and visual acuity. Model has proposed that is working on the per...

Eye movements of subjects with visual field defects due to ocular pathology were monitored while performing a dot counting task and a visual search task. Subjects with peripheral field defects required more fixations, longer search times, made more errors, and had shorter fixation durations than control subjects. Subjects with central field defects performed less well than control subjects alth...

AIM This study was designed to test the ability of a portable computer driven, head mounted visual field testing system to perform automated perimetry on patients at their bedside and to compare these results with the "gold standard" for bedside examinations, confrontation visual fields. METHODS The Kasha visual field system is a portable automated perimeter which utilises a virtual reality h...

Introduction: Consumption of morphine, during pregnancy, in addition to inducing defects in the mother’s nervous system function, caused defects or delays in the formation and evolution of embryonic visual system. In the present study, changes in lens development were assessed in embryos exposed to morphine in utero. Methods: Female Wistar rats (250-300 g) were mated with male rats and pregnanc...

A cross-sectional study was carried out on a sample of 26 VDU operators in a post office and a bank, working regularly on video display units. The study aimed at (1) determining the physical working conditions, particularly lighting conditions, (2) assessing employees' complaints, (3) measuring visual defects among operators in VDU workstations. The following results are revealed: (a) ergonomic...

AIMS The correlation between cryoscars and visual field defects following cryoablation was studied. METHODS A Humphrey 120 full field screening test was performed in 10 children (15 eyes) who were treated by cryotherapy between 10 and 14 years previously for retinopathy of prematurity (ROP) stage 3. RESULTS In eight eyes treated by cryoablation through 360 degrees in zone I or II, a moderat...