THE EYE:
Reports from philosophers and physicians regarding the function of the eye are available form as early as 300 B.C.Plato, considered to be the most important figure in the development of philosophy, suggested that the eye released rays, enabling it to see object.Aristotle,a student of plato,and a famous Greek philosopher, later challenged this idea and suggested that eye may actually in fact receive light rays rather then releasing them outward.Subsequently, in the second century A.D. Galen, a prominent Greek physician,defined many of the currently known anatomical parts of the eye and described their functions.
Contribution to the fields of Ophthalmology by Muslims.The eye was also a subject of special intrest in Islamic medicine and philosophy.From 800-1300 CE the world of Islam produced around 60 eye specialists.Meanwhile in Europe, eye specialists were unheard of befor the 12th century.Between the 9th and 14th centuries,several Islamic scholars published extensive literature on the function of human eye.The extensive work done by these Islamic scholars was compiled and over the course of the next several centuries advanced by European medical practitioners.
Refractive Errors:Refractive errors are common eye conditions in which light does not focus properly on retina, thereby causing blurry vision.They are corrected with eye glasses, contact lenses or surggery.
Astidigmatism:
This condition is caused by an irregularly shaped cornea, causing distorted vision.In Europe and Asia it affects 30-40% adults.
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