Session Title: Refractive 1
Session Date/Time: Friday 03/02/2012 | 08:30-10:00
Paper Time: 09:23
Venue: Hall 1
First Author: : A.Kerek HUNGARY
Co Author(s): : I. Kov O. Kov C. Palot
"Purpose:
To evaluate the results of treatment of moderate hyperopic and presbyopic patients using the new binocular Supracor technique by Technolas 217P excimer laser.
Setting:
OPTIMUM Laser Center for Better Vision, Budapest, Hungary.
Methods:
Our study included 24 eyes of 12 patients, followed for 3 months.
Mean age was 56.3±4.4 (51-65) years, mean spherical equivalent refraction was +1.86±0.56 (1.25-3) diopters, and mean near addition was 2.15±0.3 (2-3) diopters. The Supracor ablation pattern was applied using the Technolas 217P excimer laser, which profile steepens the center of the cornea to create hyperprolate shape resulting about 2 D near addition with controlled higher order aberrations (HOA). The periphery was treated with hyperopic ablation in a 6 mm zone, using 9.5 mm suction ring, under 120 µm flap created by the Zyoptix XP microkeratome. Mean outcome measures were uncorrected and best corrected visual acuity both for distance and near; manifest spherical equivalent refraction and higher order aberrations (HOA RMS) before and after surgery. Patients were examined on the first postoperative day, and one week, one month and three months after the surgery, variables at different time-points were compared using Wilcoxon matched pairs test. RESULTS The uncorrected near visual acuity improved from the preoperative value of 0.11±0.05 to 0.87±0.15 at day one (p<0.05) and was 0.79±0.13 at one week, 0.85±0.12 at one month and 0.87±0.15 at three months postoperatively (p>0.05 after day one). The preoperative uncorrected distance visual acuity (0.37±0.13) improved to 0.58±0.17 at day one (p<0.05), with further improvement to 0.76±0.22 at one week (p<0.05), to 0.82±0.20 at one month and to 0.77±0.18 at three months postoperatively (p>0.05 after one week). The best corrected distance and near visual acuity showed no significant changes across time-points (p>0.05). Preoperative refractive error (+1.78±0.52 D) changed to -0.71±0.44 D at day one (p<0.05), and decreased to -0.4±0.4D one week, to -0.3±0.3 one month and to 0.10±0.3 three months postoperatively. HOA RMS values increased from the preoperative mean 0.29±0.07 µm to 0.47±0.19 µm one month postoperatively (p<0.05).
Conclusions:
According to our results, uncorrected near vision improved significantly at the first postoperative day and was maintained throughout the follow-up time after Supracor treatment. The delayed improvement of uncorrected distance visual acuity was parallel with the time-dependent decrease of residual refractive error. Good visual results, modest increase in higher order aberrations and good spectacle corrected visual acuity indicate the Supracor technique as a safe, effective and efficient new option for treating presbyopia.
Financial Disclosure:
No"
