To compare toric implantable collamer lens (T-ICL), femto-LASIK, and ReLEx SMILE for the treatment of low to moderate myopic astigmatism in terms of long-term visual and refractive outcomes and predictability of astigmatic correction.
The study included 30 eyes from 30 patients between the age groups of 21 and 40 years, undergoing bilateral surgery with any of the three procedures - T-ICL, femto-LASIK, or ReLEx SMILE - for correction of myopic astigmatism within the range of -3 to -8 D spherical equivalent (SE), with a minimum astigmatism of -0.75 D. Patients were followed up at day 1, 1 month, 6 months, and 1 year.
At 1 year, the mean cylinder reduced to -0.21±0.28, -0.17±0.36, and -0.22±0.28 D in the T-ICL, femto-LASIK, and ReLEx SMILE group, respectively. The predictability of astigmatism correction was comparable, with no statistically significant difference between the 3 groups (P>0.05). A total of 97% of eyes in ReLEx SMILE achieved a uncorrected distance visual acuity of 20/20 or better, compared to T-ICL (93%) and FS-LASIK (90%). However, gain in lines of corrected distant visual acuity (CDVA) was maximum in T-ICL group (60%). Four eyes in the femto-LASIK group had loss of CDVA by one line. Three eyes required exchange due to high vault and rotation of the T-ICL, which did not affect the final outcome.
All 3 modalities were effective for myopic astigmatism at the end of 1 year. Quality of vision and patient satisfaction with T-ICL and ReLEx SMILE were similar and better than FS-LASIK. However, slight chances of postoperative rotation and exchange exist with T-ICL, which warrant thorough preoperative planning.