Simultaneous complete intracorneal ring implantation with intrapocket collagen cross-linking for treatment of keratoconus

ABSTRACT

Background: Keratoconus is a progressive non inflammatory bilateral [usually asymmetric] ectatic corneal disease characterized by paraxial stromal thinning ,weakening that lead to corneal surface distortion ,vision loss primarily from irregular astigmatism and myopia and secondly from corneal scar