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Topical anesthetic eyedrops are instilled in the affected eye before removal of a superficial foreign body, using a foreign body spud. A rust ring on the cornea must be removed with an ophthalmic burr. When only partial removal is possible, reepithelialization lifts the ring again to the surface and allows complete removal the following day.
Treatment also includes instillation of broad-spectrum antibiotic eyedrops in the affected eye every 3 to 4 hours. Application of a pressure patch prevents further corneal irritation when the patient blinks. If the patient wears contact lenses, it may be advisable for him to abstain from wearing the lenses until the corneal abrasion heals.
Source: Professional Guide to Diseases (Eighth Edition), 2005
Prompt treatment is essential for all forms of corneal ulcer to prevent complications and permanent visual impairment. Treatment usually consists of systemic and topical broad-spectrum antibiotics until culture results identify the causative organism. The goals of treatment are to eliminate the underlying cause of the ulcer and to relieve pain:
❑ Fungi — topical instillation of natamycin for Fusarium, Cephalosporium, and Candida.
❑ Herpes simplex type 1 virus — topical application of trifluridine drops or vidarabine ointment. Corneal ulcers resulting from a viral infection often recur, requiring further treatment with trifluridine.
❑ Hypovitaminosis A — correction of dietary deficiency or GI malabsorption of vitamin A.
❑ Infection by P. aeruginosa — polymyxin B and gentamicin, administered topically and by subconjunctival injection, or carbenicillin and tobramycin I.V. Because this type of corneal ulcer spreads so rapidly, it can cause corneal perforation and loss of the eye within 48 hours. Immediate treatment and isolation of hospitalized patients are required.
❑ Neurotropic ulcers or exposure keratitis — frequent instillation of artificial tears or lubricating ointments and use of a plastic bubble eye shield.
❑ Varicella-zoster virus — topical sulfonamide ointment applied three to four times daily to prevent secondary infection. These lesions are unilateral, following the pathway of the fifth cranial nerve, and are typically quite painful. Give analgesics as ordered. Associated anterior uveitis requires cycloplegic eyedrops. Watch for signs of secondary glaucoma (transient vision loss and halos around lights).
Source: Professional Guide to Diseases (Eighth Edition), 2005
The first steps in treatment include examining the eye and checking visual acuity. If the foreign object is visible, the eye can be irrigated with normal saline solution.
Removal of a deeply embedded foreign body is done with a foreign-body spud, using a topical anesthetic. A rust ring on the cornea must be removed at the slit-lamp examination with an ophthalmic burr, after applying a topical anesthetic. When only partial removal is possible, reepithelialization lifts the ring again to the surface and allows complete removal the next day.
Treatment also includes instillation of a cycloplegic eyedrop and broad-spectrum antibiotic eyedrops in the affected eye every 3 to 4 hours.
Clinical tip A pressure patch may be applied in some cases, but it’s never used if the abrasion was caused by contact lens use.
Source: Handbook of Diseases, 2003
Prompt treatment is essential for all forms of corneal ulcer to prevent complications and permanent visual impairment. Treatment aims to eliminate the underlying cause of the ulcer and to relieve pain.
Until culture results identify the causative organism, treatment consists of topical broad-spectrum antibiotics. Once the causative agent is identified, specific treatments vary.
❑ P. aeruginosa infection is treated with ciprofloxacin, gentamicin, or tobramycin, administered topically. This type of corneal ulcer can cause corneal perforation and loss of the eye very rapidly if left untreated. Immediate treatment and isolation of hospitalized patients are required.
A corneal ulcer should never be patched because patching creates the dark, warm, moist environment ideal for bacterial growth. However, it should be protected with a perforated shield.
❑ Herpes simplex type 1 virus is treated with hourly topical applications of idoxuridine or vidarabine. Corneal ulcers resulting from this viral infection commonly recur. Trifluridine is the treatment of choice.
❑ Fungi are treated with topical instillation of natamycin for Fusarium, Cephalosporium, and Candida.
❑ Hypovitaminosis A requires correction of dietary deficiency or GI malabsorption of vitamin A.
❑ Neurotropic ulcers or exposure keratitis is treated with frequent instillation of artificial tears or lubricating ointments and use of a plastic bubble eye shield or by a tarsorrhaphy (suturing the eyelids together).
Source: Handbook of Diseases, 2003
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