Carvalho Mário José, Suzuki Solange Higashitani, Freitas Lincoln Lemes, Branco Bruno Castelo, Schor Paulo, Lima Ana Luiza Hoffling
Department of Ophthalmology, Federal University of São Paulo (Paulista School of Medicine), São Paulo, Brazil.
J Refract Surg. 2007 May;23(5):499-504. doi: 10.3928/1081-597X-20070501-14.
To evaluate the safety and efficacy of limbal relaxing incisions for the correction of corneal astigmatism during phacoemulsification.
Fifty eyes of 37 patients (mean age 66.5 years, range: 45 to 80 years) with cataract and coexisting topographic astigmatism were included in the study. Eyes were randomly divided into two groups: eyes that underwent cataract surgery with limbal relaxing incisions (cataract LRI group) and eyes that underwent cataract surgery only (control group). All limbal relaxing incisions were performed during phacoemulsification. Best spectacle-corrected visual acuity (BSCVA), uncorrected visual acuity (UCVA), and corneal topography were recorded preoperatively and 1, 3, and 6 months postoperatively.
A statistically significant improvement in BSCVA was seen in the cataract LRI eyes from 0.9 +/- 0.7 preoperatively to 0.1 +/- 0.1 at 1, 3, and 6 months postoperatively (P < .01). A statistically significant improvement in BSCVA was seen in control eyes from 0.8 +/- 0.6 before surgery to 0.2 +/- 0.2 at 1, 3, and 6 months after surgery (P < .01). No difference in postoperative BSCVA was noted between the groups. A statistically significant reduction in the mean topographic astigmatism was seen in the cataract LRI eyes from 1.93 +/- 0.58 diopters (D) preoperatively to 1.02 +/- 0.60 D 6 months postoperatively (P < .05). The control eyes did not show a statistically significant change in topographic astigmatism.
Limbal relaxing incisions performed during phacoemulsification surgery appear to be a safe, effective, and stable procedure to reduce pre-existing corneal astigmatism.
评估在白内障超声乳化手术中，角膜缘松解切口矫正角膜散光的安全性和有效性。
本研究纳入了37例（平均年龄66.5岁，范围：45至80岁）患有白内障且并存地形性散光的患者的50只眼睛。将眼睛随机分为两组：接受白内障手术并进行角膜缘松解切口的眼睛（白内障LRI组）和仅接受白内障手术的眼睛（对照组）。所有角膜缘松解切口均在超声乳化手术期间进行。术前以及术后1、3和6个月记录最佳眼镜矫正视力（BSCVA）、未矫正视力（UCVA）和角膜地形图。
白内障LRI组眼睛的BSCVA从术前的0.9±0.7有统计学意义地提高到术后1、3和6个月时的0.1±0.1（P <.01）。对照组眼睛的BSCVA从手术前的0.8±0.6有统计学意义地提高到手术后1、3和6个月时的0.2±0.2（P <.01）。两组之间术后BSCVA无差异。白内障LRI组眼睛的平均地形性散光从术前的1.93±0.58屈光度（D）有统计学意义地降低到术后6个月时的1.02±0.60 D（P <.05）。对照组眼睛的地形性散光无统计学意义的变化。
在白内障超声乳化手术期间进行的角膜缘松解切口似乎是一种安全、有效且稳定的减少既有角膜散光的手术方法。
