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Various eye conditions fall under the cornea and external disease category. They include, but are not limited to:
- Corneal abrasion, an injury to the eye that scrapes the corneal surface and causes a loss of superficial tissue
- Dry eye, corneal dryness caused by deficient tear production that often produces a foreign body sensation or burning feeling
- Keratoconus, a degenerative corneal disease characterized by thinning and cone-shaping of the central cornea, affecting vision
- Fuchs' dystrophy, a progressive corneal disorder characterized by cloudy, waterlogged cornea, blisters and reduced vision; various infectious agents can also cause corneal and eye lash/lid disease.
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