Abstract
Purpose :
To evaluate the stability of axis rotation in combined 25-gauge vitrectomy using AMO Tecnis toric intraocular lens (IOL) with idiopathic epiretinal membrane (ERM). We performed a retrospective, observational clinical study to learn about the IOL rotation, astigmatism correction, and improvement in visual acuity up to 6 months postoperatively in a 25-gauge combined vitrectomy for idiopathic ERM patients.
Methods :
Eyes with a preoperative corneal cylinder of more than 0.75 diopter (D) had a triple procedure for idiopathic ERM using an AMO Tecnis toric IOL (ZCT or ZCV). Outcome measures were the amount of IOL axis rotation up to 3 months postoperatively, uncorrected distance visual acuity (UDVA), corrected distance visual acuity (BCVA), and corneal and refractive astigmatism up to 6 months postoperatively. Intraoperative microscope and postoperative anterior eye segment slit-lamp videos were digitized and input into a personal computer, and analyzed the IOL rotation. Additionally, we compared these data with the similar cases using Alcon IQ Toric (SN6AT3-5) for idiopathic ERM combined vitrectomy in our previous report (Nakano Y, et al. J Cataract Refract Surg 2013).
Results :
29 eyes were performed combined vitrectomy surgery with idiopathic ERM. Gas tamponade of the vitreous cavity was not required in any patient. Compared with immediately after surgery, the mean postoperative IOL axis rotation was 3.51 ± 3.92 degrees at 1 day, 2.94 ± 2.78 degrees at 1 week, 3.22 ± 3.32 degrees at 1 month, and 3.48 ± 3.50 degrees at 3months. The axis rotation was less than 5 degrees in 25 (86%) of 29 eyes and less than 10 degrees in 28 eyes (97%).Comparing with our previous report using Alcon IQ Toric, we noticed no significant difference: the mean postoperative IOL axis rotation was 3.91 degrees at 1 day, 2.46 at 1 week, 3.78 at 1 month, and 3.67 at 3 months. Six months postoperatively, the mean corneal and refractive cylinders were 1.50 ± 0.56 D and 0.85 ± 0.54 D, respectively, refractive cylinder was significantly lower than corneal cylinder (P<.0001, paired t test). Preoperative UDVA was 0.63 ± 0.22 logMAR and improved to 0.34 ± 0.22 postoperatively (P<0.001). Preoperative BDVA was 0.28 ± 0.18 logMAR and improved to 0.08 ± 0.15 postoperatively (P<0.001).
Conclusions :
In combined vitrectomy for idiopathic ERM with AMO Tecnis toric IOL, postoperative IOL axis stability was similar to that reported for Alcon IQ Toric IOL.
This abstract was presented at the 2019 ARVO Annual Meeting, held in Vancouver, Canada, April 28 - May 2, 2019.