| Abstract: | Photorefractive keratectomy (PRK) is the alteration of corneal curvature by photoablation with an excimer laser to eliminate or significantly reduce refractive errors. In this paper, we present a comprehensive review of the literature on this procedure, from the principles and development of the laser system, to its clinical application, Melbourne particularly for the correction of myopia. Both animal and human studies have shown promising results and the procedure is fundamentally superior to radial keratotomy and other refractive surgical procedures; patient response is encouraging, refractive results are reasonably predictable and serious adverse effects on the cornea are infrequent. However, a number of concerns remain, including stromal haze and opacification, regression and instability of the refractive effect, decreased visual performance, due to light scattering and an imperfect refracting surface, and potential long-term side-effects. Optometrists should be well informed regarding PRK, so as to provide expert, independent advice for prospective patients, as well as pre- and post-operative follow- up care. |
