الفهرس 
High myopiaOnly 14 pages are availabe for public view
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Abstract
High myopia or pathological myopia is assocaited with globe elongation and a refractive error at least 6 diopter and/or axial length of greater than 25.5mm . Epidemiological studies have demonstrated increased prevalence of peripheral retinal degenerations in association with high myopia and increased axial length4-17. Among the different types of peripheral retinal degenerations in high myopia, lattice degeneration is the most important peripheral retinal degeneration which can predispose to rhegmatogenous retinal detachment. This is because retinal tears can develop at the posterior and lateral margins of the lattice degeneration caused by strong vitreoretinal adhesions following posterior vitreous detachment. Around 30% of eyes with acute RRD have been found to have lattice degeneration, prophylactic laser treatment can also be performed in patients with peripheral retinal degenerations especially those with a history of retinal detachment in the fellow eye . Laser treatment may be applied to prevent accumulation of fluid beneath the retina and minimize the risk of a vision-threatening retinal detachment. The laser is applied around the retinal defect. Over the course of a few weeks, the treated area develops a scar, which forms a tight seal between the retina and the underlying tissue. This procedure is sometimes performed around weak areas in the retina, such as lattice degeneration, in patients who may be at higher risk for retinal detachment.