Lindquist T D, Williams P A, Lindstrom R L
Department of Ophthalmology, University of Washington, Seattle 98195.
Ophthalmic Surg. 1991 Jan;22(1):12-5.
Secondary hyperopia following radial keratotomy (RK) may result from an initial overcorrection or from a continued effect of the procedure with time. We retrospectively evaluated the effect of surgical intervention for the management of overcorrection following RK in six patients who had undergone reopening of all RK incisions, followed by irrigation and closure of the incisions with 10-0 mersilene sutures. Three patients with prior 4-incision RK, with follow-up of 4 to 26 months, were steepened a mean of 1.63 diopters keratometrically; three patients with prior 8-incision RK, with follow-up of 3 to 12 months, were steepened a mean of 1.46 D keratometrically. Comparison of intraoperative with postoperative keratometry demonstrated a substantial loss of effect with time, which stabilized by 2 months in 4-incision RK patients and by 3 months in 8-incision RK patients. Nevertheless, placement of interrupted sutures across reopened radial incisions consistently induced central corneal steepening in these six patients.
放射状角膜切开术（RK）后继发性远视可能源于初始的过度矫正，或源于该手术随时间的持续影响。我们回顾性评估了手术干预对6例RK术后过度矫正的治疗效果，这6例患者均重新切开了所有RK切口，随后进行冲洗并用10-0丝线缝合关闭切口。3例曾接受4切口RK手术的患者，随访4至26个月，角膜曲率计测量平均变陡1.63屈光度；3例曾接受8切口RK手术的患者，随访3至12个月，角膜曲率计测量平均变陡1.46 D。术中与术后角膜曲率测量结果比较显示，随着时间推移效果大幅下降，4切口RK患者在2个月时稳定，8切口RK患者在3个月时稳定。然而，在这6例患者中，横跨重新切开的放射状切口间断缝合一致地导致中央角膜变陡。
