| 1 | A statistical approach to classification of keratoconus显示文摘INTRODUCTION The front portion of the eye consists of a transparent layer called the cornea.The cornea is an important optical component for vision and plays a role in the specific refraction of the eye.The cornea normally has convexity but the amount of protrusion progressively increases in patients with keratoconus.In other words,the cornea prolapses forward.Keratoconus is a bilateral,typically asymmetric and non-inflammatory degeneration of the cornea caused by corneal protrusion as a result of progressive thinning of the corneal stroma.Corneal thinning generally occurs in the inferior,inferotemporal or central regions of the cornea^([1]).However,corneal thinning in the upper quadrants of | Murat Ucar Hasan Basri Cakmak Baha Sen | 2016 | International Journal of Ophthalmology(English edition)2016，9，9： | 1 |
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