الفهرس 
Anatomical BackgroundOnly 14 pages are availabe for public view
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Abstract
Myopia (especially degenerative or pathological one) is one of the leading causes of disability and permanent visual loss in adults through out the world. Material & Method: This study was conducted on myopic patients. Every patient underwent a complete ophthalmic examination. Fluorescein angiography and indocyanine green angiangiography were performed on the same day. Results: Unlike FA, ICGA is very helpful in visualizing the medium and large sized choroidal vessels because the dye is more proteinbound which reduces the amount of leakage through the fenestrations of the choriocapillaris and enables a clear view to the choroidal circulation while in FA the unbound fluorescein is very small and rapidly leaks from the choriocapillaris and obscures the underlying choroidal vessels. Conclusion: a) ICGA was superior to FA in the detection of the following degenerative changes: atrophic areas, posterior staphyloma, myopic discs and crescents, altered choroidal vasculature and lacquer cracks. b) ICGA alone allows identification of retrobulbar arteries and veins and it is the best method for visualizing and studying the ZinnHaller arterial ring in vivo in high myopia. c) In the presence of retinal and subretinal haemorrhages, ICGA is superior to FA in the differentiation of lacquer cracks from CNV.