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Clinical research on phakic toric implantable collamer lens to correct high myopia associated with astigmatism
Session Title: Phakic IOLs and keratoconus or high astigmatism
Session Date/Time: Sunday 06/10/2013 | 17:00-18:30
Paper Time: 17:28
Venue: Elicium 1 (First Floor)
First Author: : K.Yu CHINA
Co Author(s): :
To assess the effectiveness, predictability, safety and stability of phakic Toric Implantable Collamer Lens (TICL).
Zhongshan Ophthalmic Center，Sun Yat-sen University
20 patients (34 eyes) whose myopic refraction was -11.17±2.39D（range:-6.50 to -17.00）, astigmatism was -2.62±0.92D（range:-1.50 to -4.75）were underwent TICL. The follow-up was 1st day, 1st week, 1st month , 6th months and 1st year postoperatively. The uncorrected visual acuity (UCVA), refraction, vaulting and axis of TICL lens, intraocular pressure (IOP), slit lamp examination and fundus would be checked. Paired-t test was used to analyze the data, Bootstrap test would be used; categorical data was analyzed in percentage.
Significant improvement of UCVA was observed at 1st day postoperatively over preoperative best corrected visual acuity (BCVA) (0.98±0.35 VS 0.83±0.29, P=0.001); UCVA was also significantly improved at 1st week over 1st day postoperatively (1.13±0.35 VS 0.98±0.35, P=0.011), while was stable between the next follow-ups (1.13±0.35 VS 1.14±0.33 VS 1.09±0.38 VS 1.01±0.40, P=0.270, 0.066, 0.217). No significant difference was observed between the preoperatively reserved and the follow-ups’ refraction (0.05±0.11D VS -0.14±0.90D VS -0.03±0.63D VS -0.15±0.78D VS -0.34±1.02D VS -0.65±1.18D, P=0.302, 0.634, 0.187, 0.222, 0.451). Vaulting was stable (1.16±0.62CT VS 1.32±0.53CT VS 1.29±0.46CT VS 1.24±0.35CT VS 1.15±0.44CT, P=0.154, 0.724, 0.106, 0.189). Axis of 1st year postoperatively was significantly different from that of surgical designed（3.47±28.82°VS 0.31±6.05°,P=0.016）, the corresponding change of refraction was within 1.25D. 1eye got high IOP at 1st day, and 3 eyes got opacitas at 1st year postoperatively, but most could recover through treatment. No other complications were observed.
TICL was effective, predictable and safe to correct high myopia associate with astigmatism; UCVA, refraction and vaulting of each follow-up in one year after surgery were stable, while the center axis of TICL lens was not—TICL lens would rotate in the eye.