Premium
Hazy days? The refractive outlook of photorefractive keratectomy/photo‐astigmatic keratectomy
Author(s) -
Weed Kathryn H.,
McGhee Charles N. J.,
Bryce Iain G.
Publication year - 1995
Publication title -
ophthalmic and physiological optics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.147
H-Index - 66
eISSN - 1475-1313
pISSN - 0275-5408
DOI - 10.1046/j.1475-1313.1995.9500052f.x
Subject(s) - photorefractive keratectomy , ophthalmology , refractive error , excimer , medicine , visual acuity , astigmatism , vision disorder , optometry , optics , laser , physics
Summary The refractive outcome of 100 healthy myopic eyes which had undergone excimer laser (VISX 20/20) was evaluated at 6 months post‐treatment. Patients were subdivided into Group A ( n = 51, < −5.00 D spherical equivalent (SE)), Group B ( n = 38, −5.00 to < −10.00 D SE) and Group C ( n = 11, > −10.00 D SE). The mean myopic sphere decreased from −2.88 to −0.22 DS, −5.94 to −0.43 DS and −12.61 to −1.83 DS, respectively. Cylinder reduction ranged from 23 to 53%, effectiveness: decreasing with increasing associated myopia. Sixty‐six percent of all subjects attained an SE correction within 1.00 D of that attempted, however, 80% actually achieved vision of 6/12 or better. At 6 months only six eyes were not within one line of their pre‐operative best spectacle visual acuity (BSVA) and four of these exhibited haze greater than Grade 1. In low myopia, photorefractive keratectomy (PRK) appears to be highly successful with 93% of subjects with an initial myopia of < −5.00 D SE obtaining 6/12 or better vision. However, photo‐astigmatic refractive keratectomy (PARK) was variable within all groups.