<unk> s are generally a result of trauma to the surface of the eye. Common<unk> uses include being poked by a finger, walking into a tree branch, and wearing old contact lenses. A foreign body in the eye may also<unk> use a scratch if the eye is rubbed. Injuries<unk> n also be incurred by "hard" or "soft" contact lenses that have been left in too long. Damage may result when the lenses are removed, rather than when the lens is still in contact with the eye. In addition, if the<unk> becomes excessively dry, it may become more brittle and easily damaged by movement across the surface. Soft contact lens wear overnight has been extensively linked to gram negative keratitis (infection of the<unk>  particularly by a bacterium known as Pseudomonas aeruginosa which forms in the eye's biofilm as a result of extended soft contact lens wear. When a<unk>  occurs either from the contact lens itself or another source, the injured<unk> is much more susceptible to this type of bacterial infection than a non-contact lens user's would be. This is an optical emergency as it is sight (in some<unk> ses eye) threatening. Contact lens wearers who present with<unk> s should never be pressure patched because it has been shown through clinical studies that patching creates a warm, moist dark environment that<unk> n<unk> use the<unk> to become infected or<unk> use an existing infection to be greatly accelerated on its destructive path.<unk> s are also a common and recurrent feature in people who suffer specific types of<unk>  dystrophy, such as lattice<unk>  dystrophy. Lattice dystrophy gets its name from an accumulation of amyloid deposits, or abnormal protein fibers, throughout the middle and anterior stroma. During an eye examination, the doctor sees these deposits in the stroma as clear, comma-shaped overlapping dots and branching filaments, creating a lattice effect. Over time, the lattice lines will grow opaque and involve more of the stroma. They will also gradually converge, giving the<unk> a cloudiness that may also reduce vision. In some people, these abnormal protein fibers<unk> n accumulate under the<unk> s outer layer—the epithelium. This<unk> n<unk> use erosion of the epithelium. This condition is known as recurrent epithelial erosion. These erosions: (1) Alter the<unk> s normal curvature, resulting in temporary vision problems; and (2) Expose the nerves that line the<unk> <unk> using severe pain. Even the involuntary act of blinking<unk> n be painful.
Corneal abrasion
Globe rupture
Corneal ulcer
Corneal perforation
Baby colic
Orbital emphysema
Pitted keratolysis
Band keratopathy