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Pirenoxine (abbreviated PRX, trade name Catalin) is a medication used in the possible treatment and prevention of cataracts. A report in the Inorganic Chemistry journal s howed that in liquid solutions, pirenoxine could cause decreased cloudiness of a crystallin solution produced to mimic the environment of the eye.
A foreign body in the eye may also cause a scratch if the eye is rubbed. [7] Injuries can 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.
Cataracts typically occur when proteins break down in the lens of a dog's eye and clump together, obstructing the passage of light. [ 1 ] [ 2 ] There are several reasons cataracts may occur in dogs, such as heredity, trauma, aging, diabetes , glaucoma , and progressive retinal atrophy .
FHV-1 also suppresses healing of the cornea. Symptoms include conjunctivitis, squinting, eye discharge, and blood vessels on the cornea. It can cause severe scarring. Treatment is with topical antiviral drugs and antibiotics, and oral L-lysine, which competes with arginine and inhibits viral replication. [7]
A punctal plug may be inserted into the tear duct by an optometrist or ophthalmologist, decreasing the removal of natural tears from the affected eye. [8] The use of contact lenses may help prevent the abrasion during blinking lifting off the surface layer and uses thin lenses that are gas permeable to minimise reduced oxygenation.
Spasm of accommodation is frequently resistant to treatment. However, some patients do find relief through the use of daily eye dilation with cycloplegic drops. One side effect of cycloplegic drops is that they often have BAK as a preservative ingredient, which, with daily use, can erode the tear shield: