In astigmatism occurs a combination of different types of eye refraction or different degrees of refraction. That is, in one eye may be combined effects of myopia and presbyopia varying degrees.
Anatomy of the cornea
Cornea is front convex, transparent, avascular plate of the eyeball, which is direct continuation of the sclera. Human cornea is approximately 1/6 of the outer layer of the eye.
Congenital cataracts cover a broad spectrum of severity: whereas some lens opacities do not progress and are visually insignificant, others can produce profound visual impairment.
History of ophthalmology
The first cataract operation
The first cataract operation was performed about 200 years ago, by a surgeon Jacques Daviel.
Sir Harold Ridley was the first to successfully implant an intraocular lens on 29 November 1949, at St Thomas'…
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