Keratoconus (kerato: Cornea; konos: Cone) is a Greek word. It is a multifactorial non-inflammatory, progressive disease with biomechanical, biochemical, genetic, and environmental pathophysiology. Keratoconus is characterized by a steepening and thinning of the central and paracentral cornea causing myopia and irregular astigmatism. This eye disease affects approximately 1/2000 people of all races and both sexes equally. The onset of this disease is during the second decade of life around puberty. Keratoconus is bilateral and asymmetric ectatic eye condition which progresses until life’s fourth decade.