Oman Eye Study 2005: prevalence and determinants of glaucoma

This community-based study was carried out to estimate the prevalence and identify the determinants of glaucoma in the Omani population in 2005-06. Residents of 75 randomly selected houses in 25 clusters participated in the survey. We interviewed and examined 3324 individuals aged >/= 30 years in their homes and in eye clinics to note personal details, glaucoma status and presence of selected risk factors: 180 were diagnosed as having glaucoma. Projected prevalence of glaucoma among the Omani population >/= 30 years was 4.75%. Open angle and angle closure types of glaucoma contributed 40.6% and 37.8% respectively. History of hypertension was negatively, and older age and family history of glaucoma were positively, associated with glaucoma

Pre and post operative assessment of astigmatism in pterygium cases

A significant degree of corneal astigmatism can be induced by the encroachment of a pterygium on to the cornea, which can have a significant impact on vision. There is a significant correlation between the extension of the pterygium on to the cornea and the amount of induced astigmatism. The pterygium generally causes With the Rule astigmatism that is hemi-meridional on the side of pterygium. This study was undertaken to evaluate the effect of successful pterygium surgery on existing refractive astigmatism. Four eyes with primary pterygium with astigmatism were analysed before and after pterygium excision. Astigmatism increased with the increase in the grade of pterygium, and subsequent excision of the pterygium brought a significant decrease in With the Rule astigmatism