Codet Vision Institute, Tijuana, Mexico.
J Refract Surg. 2011 Sep;27(9):639-42. doi: 10.3928/1081597X-20110105-01. Epub 2011 Jan 17.
The management of preoperative and residual astigmatism is critical to obtain optimized uncorrected visual acuity. The aim of this study was to determine whether residual astigmatism could be precisely corrected postoperatively using the Light Adjustable Lens (LAL, Calhoun Vision Inc) and to determine the stability of the adjusted refraction.
Ten eyes of 10 patients with cataract and corneal astigmatism between 1.00 and 2.00 diopters (D) were included. After standard phacoemulsification and implantation of the LAL, adjustment and lock-in procedures were completed. Before adjustment and 2 weeks, 6 months, and 1 year after lock-in, a full ophthalmic examination including uncorrected distance acuity (UDVA) and corrected distance visual acuity (CDVA), autorefraction, and manifest refraction was performed.
All surgeries, adjustments, and lock-in procedures were performed with no complications. All eyes achieved ±0.50 D of the targeted cylindrical adjustment. Mean spherical equivalent refraction was 0.03±0.84 D before adjustment and -0.06±0.25 D at final follow-up. The cylinder axis remained the same in 60% of eyes and all eyes were stable within 10° rotation at 12-month follow-up. Seven of 10 eyes achieved UDVA of 20/25 or better whereas all eyes achieved UDVA of 20/32 or better. Corrected distance visual acuity remained stable in all eyes.
In this pilot study, the LAL proved to be an efficient, predictable, and stable method of managing astigmatism in cataract patients.
术前和残余散光的管理对于获得优化的未矫正视力至关重要。本研究旨在确定使用 Light Adjustable Lens（LAL，Calhoun Vision Inc）是否可以精确地矫正术后残余散光，并确定调整后的屈光度的稳定性。
纳入 10 例白内障合并 1.00 至 2.00 屈光度角膜散光的患者的 10 只眼。在进行标准的超声乳化白内障吸出术和 LAL 植入后，完成了调整和锁定程序。在调整前和锁定后 2 周、6 个月和 1 年，进行了全面的眼科检查，包括未矫正的远视力（UDVA）和矫正的远视力（CDVA）、自动折射和显微微观折射。
所有手术、调整和锁定程序均无并发症。所有眼睛均达到了目标圆柱调整的±0.50 D。调整前平均等效球镜度为 0.03±0.84 D，最终随访时为-0.06±0.25 D。60%的眼睛的圆柱轴保持不变，在 12 个月随访时所有眼睛的旋转均在 10°以内稳定。10 只眼中有 7 只达到了 20/25 或更好的 UDVA，所有眼睛均达到了 20/32 或更好的 UDVA。所有眼睛的矫正远视力均保持稳定。
在这项初步研究中，LAL 被证明是一种治疗白内障患者散光的有效、可预测和稳定的方法。
