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The purpose of this study is to determine whether adding topical steroids improves the outcomes of bacterial corneal ulcers, especially visual acuity.
Antimicrobial treatment of a bacterial corneal ulcer is generally effective in eradicating infection. However, "successful" treatment is not always associated with a good visual outcome. The scarring that accompanies the resolution of infection leaves many eyes blind. Some corneal specialists advocate the use of topical corticosteroids along with antibiotics in an effort to reduce immune-mediated tissue damage and scarring. Others fear using steroids to reduce the cornea's immune response will prolong or even exacerbate infection. Ophthalmologists have been divided on this issue for more than 30 years, and both approaches are acceptable according to the American Academy of Ophthalmology's Preferred Practice Patterns. Evidence from animal and human reports is mixed. A single randomized trial saw a non-significant benefit to steroids but was drastically underpowered (20 patients per study arm).
The study is a randomized, double-masked, placebo-controlled trial to determine whether adding topical steroids improves the outcomes of bacterial corneal ulcers. Five hundred bacterial corneal ulcers presenting to the Aravind Eye Hospitals, the UCSF Proctor Foundation, and the Dartmouth- Hitchcock Medical Center are being randomized to receive antibiotic plus steroid or antibiotic plus placebo. They are being followed closely until re- epithelialization and then rechecked at three weeks, three months and 12 months post enrollment. The primary outcome is best spectacle-corrected logMAR visual acuity three months after enrollment, using best spectacle-corrected enrollment visual acuity as a co-variate.
The pilot study was conducted from January, 2005 to August, 2005 at Aravind Eye Hospital to assess the feasibility and safety and to estimate the sample size of a larger main trial. 42 patients with culture-proven bacterial keratitis were enrolled. They were treated and followed up as in the main trial, up to 3 months from enrollment.
Allocation: Randomized, Control: Placebo Control, Endpoint Classification: Safety/Efficacy Study, Intervention Model: Parallel Assignment, Masking: Double Blind (Subject, Caregiver, Investigator, Outcomes Assessor), Primary Purpose: Treatment
Antibiotics, Topical corticosteroid, Placebo
Proctor Foundation, UCSF
Active, not recruiting
University of California, San Francisco
Published on BioPortfolio: 2014-08-27T03:44:48-0400
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Loss of epithelial tissue from the surface of the cornea due to progressive erosion and necrosis of the tissue; usually caused by bacterial, fungal, or viral infection.
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The measurement of curvature and shape of the anterior surface of the cornea using techniques such as keratometry, keratoscopy, photokeratoscopy, profile photography, computer-assisted image processing and videokeratography. This measurement is often applied in the fitting of contact lenses and in diagnosing corneal diseases or corneal changes including keratoconus, which occur after keratotomy and keratoplasty.
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Ophthalmology is the branch of medicine that is devoted to the study and treatment of eye diseases. As well as mild visual defects correctable by lenses, ophthalmology is concerned with glaucoma, uveitis and other serious conditions affecting the eye, ...