This paper reports the results of 372 patients fit with the Paraperm EW rigid gas permeable lens for extended wear. This lens material is a copolymer derived from siloxane and methylmethacrylate with an oxygen permeability (Dk) of 56 X 10-11 at 37°C. At the end of 1 year, 270 patients had completed the study with 94.8% achieving 20/25 or better vision. Complications included a 12.3% incidence of superficial limbal keratitis with staining, a 3.1% incidence of conjunctival injection, and a 1.5% incidence of observable corneal edema. The lens appears to be a significant addition to the possibilities available for fitting extended wear patients or those who desire occasional overnight lens wear.
|Original language||English (US)|
|Number of pages||4|
|State||Published - Jan 1 1989|
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