Blaylock John F, Hall Brad
Valley Laser Eye Centre, Abbotsford, BC, Canada.
Sengi, Penniac, NB, Canada.
Clin Ophthalmol. 2020 Dec 14;14:4373-4378. doi: 10.2147/OPTH.S285711. eCollection 2020.
To determine if intraoperative aberrometry (IA) improves astigmatic outcomes for trifocal toric IOL (TTI) cases.
This was a retrospective study examining 137 eyes that underwent cataract extraction and TTI implantation using femtosecond laser, digital registration, and IA. Final cylinder power and axis of placement were determined by IA. Monocular uncorrected distance visual acuity (UDVA), uncorrected intermediate visual acuity (UIVA), uncorrected near visual acuity (UNVA), and refractive data were collected at 3 months. Postoperative residual astigmatism (PRA) determined by manifest refraction was compared to back-calculated residual astigmatism (BRA) using the cylinder power calculated preoperatively.
Postoperatively, 97.8% of eyes had IA PRA ≤ 0.50D and 80.3% had BRA ≤ 0.50 D, a difference of 17.5%. Mean PRA for IA was 0.07 D ± 0.19 (range 0.00-1.00 D) compared to BRA 0.31 D ± 0.33 (range 0.00-1.34 D) (P < 0.001). Cylinder power was changed in 50.4% of cases based upon IA. Postoperative mean UDVA (LogMAR) was 0.04 ± 0.09 (range -0.12-0.30 logMAR), and 65% of eyes were ≤ 0.0, 85% ≤ 0.1, and 99% ≤ 0.18.
The proportion of eyes with PRA ≤ 0.50 D and mean PRA was significantly lower using IA versus the preoperative planned cylinder power.
确定术中像差仪（IA）是否能改善三焦点散光人工晶状体（TTI）病例的散光治疗效果。
这是一项回顾性研究，研究对象为137只接受了使用飞秒激光、数字配准和IA的白内障摘除及TTI植入手术的眼睛。最终柱镜度数和植入轴由IA确定。在术后3个月收集单眼未矫正远视力（UDVA）、未矫正中视力（UIVA）、未矫正近视力（UNVA）和屈光数据。将通过显然验光确定的术后残余散光（PRA）与使用术前计算的柱镜度数反推计算出的残余散光（BRA）进行比较。
术后，97.8%的眼睛IA PRA≤0.50D，80.3%的眼睛BRA≤0.50D，相差17.5%。IA的平均PRA为0.07D±0.19（范围0.00 - 1.00D），而BRA为0.31D±0.33（范围0.00 - 1.34D）（P<0.001）。基于IA，50.4%的病例柱镜度数发生了改变。术后平均UDVA（LogMAR）为0.04±0.09（范围 - 0.12 - 0.30 LogMAR），65%的眼睛≤0.0，85%≤0.1，99%≤0.18。
与术前计划的柱镜度数相比，使用IA时PRA≤0.50D的眼睛比例和平均PRA显著更低。
