survey of ophthalmic problems in Sinai [Rubbaa and Negeela]

An organized survey, to the inhabitants of Rabaa and Negeela in Sinai, was carried out in September 1986 by the Faculty of Medicine. Suez Canal University. Glare conjunctivitis, allergy and infection of the anterior segment of the eye were most common

Ergonomics of vision legibility of road signs in reduction of traffic accidents

Road signs and traffic control devices in the Cairo Governorate area were with particular attention to design, placement, uniformity and maintaince. Several recommendations were concluded and delivered to the central Department of Traffic Police. We requested the removal of all traffic signs not complying to standards, re-placement of signs and adhesion to standards for conventional road guide signs

Ultrastructure of the trabecular meshwork in cases of chronic glaucoma

Serial sections of 90 trabeculectomy specimens of different types of medically uncontrolled glaucoma [52 open angle, 19 narrow angle and 19 other types of glaucoma] were examined by light microscopy. The best 11 specimens, showing the least surgical trauma, were further studied by electron microscopy. Detailed morphometric analysis of the inner wall of Schlemm's canal and the adjacent cirbiform meshwork in the photomontages has shown the following significant observations: 1. - Reduction of the number and size of vacuoles in the endothelial cells. 2. - Reduction of the intercellular free space. 3. - Increase of electron dense material accumulation. We believe that the transport of aqueous humour from anterior chamber into Schlemm's canal is by fluid transport regulated by the activity of the endothelial lining of Schlemm's canal. Thus, we may hypothesize that a dercrease in cellular activity of the endothelial lining of Schlemm's canal may be an aetioIogical factor in primary open angle glaucoma