Alió J L, Ismail M M, Artola A, Pérez Santonja J J
Department of Ophthalmology, Instituto Oftalmologico de Alicante, Spain.
J Refract Surg. 1997 Jan-Feb;13(1):13-6. doi: 10.3928/1081-597X-19970101-06.
To evaluate the safety and effectiveness of non-contact holmium:YAG laser thermal keratoplasty in correcting hyperopia induced by photorefractive keratectomy (PRK).
Non-contact holmium:YAG laser thermal keratoplasty was applied to 14 eyes with significant hyperopia induced by PRK. The mean spherical equivalent refraction before holmium:YAG laser thermal keratoplasty was +4.20 +/- 1.80 diopters (D) (range, +1.75 to +6.25 D). The results were evaluated 12 months after holmium:YAG laser thermal keratoplasty.
No sight-threatening complications occurred. Recovery of spectacle-corrected visual acuity took from 2 to 6 weeks. The immediate significant myopic shift that developed in all eyes gradually receded over 6 to 8 weeks. All eyes were relatively stable after 9 months. At 12 months, there was no statistically significant difference (p < .005) between the mean preoperative spectacle-corrected visual acuity (0.71 +/- 0.12) and the mean postoperative uncorrected visual acuity (0.65 +/- 0.28). At 12 months there was a mean increase of 4.60 +/- 1.20 D in central keratometric power. Total regression did not occur in any eye.
Non-contact holmium:YAG laser thermal keratoplasty offers a safe and effective alternative to correct PRK-induced hyperopia.
评估非接触式钬激光热角膜成形术矫正准分子原位角膜磨镶术（PRK）所致远视的安全性和有效性。
对14只因PRK导致明显远视的眼睛实施非接触式钬激光热角膜成形术。钬激光热角膜成形术前平均等效球镜度为+4.20±1.80屈光度（D）（范围为+1.75至+6.25 D）。在钬激光热角膜成形术后12个月评估结果。
未发生威胁视力的并发症。矫正视力恢复时间为2至6周。所有眼睛出现的即刻明显近视性偏移在6至8周内逐渐消退。9个月后所有眼睛相对稳定。12个月时，术前平均矫正视力（0.71±0.12）与术后平均未矫正视力（0.65±0.28）之间无统计学显著差异（p<0.005）。12个月时中央角膜曲率平均增加4.60±1.20 D。没有一只眼睛出现完全回退。
非接触式钬激光热角膜成形术为矫正PRK所致远视提供了一种安全有效的替代方法。
