effect of exposure to heat on the human eye

This study aim to investigate the effect of heat on the exposed worker's eye and to estimate visual disturbances among the workers. 50 exposed worker and 40 control undergo a complete medical examination including measuring of blood pressure and glucose in urine, opthalmological examination for V.A., oblique illumination, occular tension; slit lamp and fundus examination. The indoor wet bulb globe temperature was calculated. Changes in the visual acuity well found, 4% chronic blepharitis, 10% corneal lesions, 16% posteiror cortical cataract and 14% myopicfundus. No iris changes or intraocular tension change well found. Most of these findings well attributed to heat exposure and different recommendations were given

Rose Bengal screening test for community diagnosis of avitaminosis a among children in a high density area of Cairo

320 Children of both sexes aged from 2 months to 10 years were randomly selected from attendants to Misr Elkadema MCH centre. Conjunctival xerosis caused by avitaminosis A was detected by Rose Bengal Test in 20.9% of children [prevalence rate: 209/1000], while clinically by the professor of ophthalmology 6.2% of children were diagnosed [prevalence rate: 62/1000], with a statistically significant difference of P < 0.001. Rose Bengal Test proved to be highly sensitive and specific, valid, reliable, harmless, cheap, available, simple and practical screening test to be used by paramedical personnel as well as it is the only sure single method for pre symptomatic community diagnosis of conjunctival xerosis. The study showed that the most vulnerable age group for avitaminosis A was one year of age and over [P < 0.001]. There was no significant sex difference regarding prevalence of avitaminosis A [X2 = 1.039 < d.f. =1 P > 0.05]. Dietary supplementation by vegetables and/or vitamin A capsules played a major role in the prevention of vitamin A deficiency