ultrasonic study of diabetic patients undergoing cataract extraction

This study was conducted on 50 diabetic patients having cataract that was dense enough to obscure visualization of the posterior segment of their eyes by optical means. A comparison was done between the pre- operative ultrasonic findings and the postoperative ophthalmoscopic evaluation of the operated eyes. The diagnostic accuracy of ultrasonography was 82%. Dense vitreous echoes were detected in 4% of the cases while epiretinal membranes were found in 6% of the cases, both findings were accurately diagnosed by ultrasonography. When dealing with scattered vitreous echoes, the sensitivity and negative predictive values of ultrasonography were higher than its specificity and positive predictive values, indicating that the ultrasonography is a good negative test

Value of electrophoresis of tears in diagnosis of dry eye syndrome

Fifty cases of dry eye syndrome based on clinical symptoms, diminution of Schirmer's test and a low tear film break up time were subjected to electrophoresis of tears in order to study the glandular function in dry eyes syndrome, and to establish both diagnosis and prognosis

Retinal circulation time and flow in relations to blood viscosity in diabetics

The appearance of blood flow in the retinal arteries and its transient time to the retinal veins were documented in diabetics using flucrescein dye and the wide angle fundus camera. The time was correlated to the level of viscosity in the blood and type of retinopathy in 54 male juvenile diabetics and in 20 normal controls. In diabetics it was found that the retinal transient arterio venous time was shortend compared to normal, but was prolonged in the presence of hyperviscosity or retinopathy. The rapid retinal flow in diabetics without complications may be used as an early sign of retinal hypoxia and subsequent retinopathy