OBJECTIVE: To examine the long-term safety and efficacy of hyperopic @entity9762 ( @entity8108 -ALK) for correction of primary @entity3467 and for consecutive @entity3467 following overcorrected myopic refractive surgery. METHODS: A prospective study was done on 67 eyes of 50 consecutive @entity1 who underwent @entity8108 -ALK between March 17, 1993, and August 18, 1995. Hyperopic @entity9762 was performed for primary @entity3467 in 25 eyes (group 1) and for consecutive @entity3467 after myopic refractive surgery in 42 eyes (group 2, radial keratotomy, 41 eyes, and myopic @entity9762 , 1 eye). The eyes were followed up for a mean+/-SD of 19.2+/-12.8 months (range, 3-49 months), 58 (87%) of them with 6 months' follow-up, and 45 (67%) of them with at least 1 year's follow-up. Twenty-one eyes were followed up for 2 to 4 years. RESULTS: The overall mean+/-SD preoperative spherical equivalent was +2.87+/-1.28 diopters (D). The mean+/-SD postoperative spherical equivalent was -0.03+/-1.42 D at 3 months, -0.42+/-2.25 D at 6 months, -0.55+/-3.00 D at 1 year, -1.58+/-1.53 D at 2 years, and -0.35+/-1.79 D at the last follow-up. A mean myopic shift of 0.50 D was noted between 3 months and 1 year, and of 1.00 D between 1 and 2 years. @entity3467 was meaningfully reduced and visual acuity was improved by @entity8108 -ALK, especially for @entity1 with primary @entity3467 . Long-term refractive instability, however, is a serious problem with this procedure. In this series, 11 (26%) of 42 eyes in which @entity8108 -ALK was performed for consecutive @entity3467 developed @entity4499 . CONCLUSION: Based on this study, the long-term instability of @entity8108 -ALK and the high incidence of @entity4499 following the procedure should discourage its use, especially for consecutive @entity3467 following radial keratotomy.

Hyperopic XXXX : complications and visual results.

@entity1 :: ('9606', 'Species') :: ['patients'] @entity4499 :: ('MESH:D007049', 'Disease') :: ['iatrogenic keratoconus'] @entity3467 :: ('MESH:D006956', 'Disease') :: ['hyperopia', 'Hyperopia'] @entity8108 :: ('D006859', 'Chemical') :: ['H'] @entity9762 :: ('MESH:C535342', 'Disease') :: ['automated lamellar keratoplasty']
@entity9762 :: (MESH:C535342,Disease) :: ['automated lamellar keratoplasty']
