Thesis (M.Sc.) - Cairo University - Faculty of Medicine - Department of Ophthalmology

Angle Glaucoma (POAG). In addition, severe myopes show significant visual field changes in POAG. Also, decreased central corneal thickness (CCT) was found to be a risk factor for progression of ocular hypertension to POAG in the ocular Hypertension Treatment Study. Moreover, decreased central corneal thickness forms an additional risk factor for the development of POAG. Thus, both myopia and decreased CCT are considered risk factors for the development of POAG. Accordingly, correlation of the degree of myopia and the CCT may provide an explanation of the higher incidence of development and progression of glaucoma in myopic individuals. (Chen et al., 2014) With the increasing incidence of myopia, refractive surgery such as laser in situ keratomileusis (LASIK) has become popular. When undertaking such surgery, the central corneal thickness (CCT) is one of the important factors that should be taken into consideration, leaving the patient a sufficient residual corneal bed to prevent the development of post-operative ectasia. Studies that have attempted to investigate the effect of refractive errors on CCT have reported conflicting results. One study showed no correlation between the central corneal thickness and the degree of myopia

Issued also as CD