Safety and efficacy of toric implantable collamer lens V4c model – A retrospective South Indian study
S Ravi Chaitanya1, Venugopal Anitha2, Meenakshi Ravindran3, Aditya Ghorpade4, Ramakrishnan Rengappa5, Mahammed Sithiq Uduman6
1 Fellow in Cornea and External Diseases, Aravind Eye Hospitals and Post Graduate Institute, Tirunelveli, Tamil Nadu, India 2 HOD, Cornea and Refractive Services, Aravind Eye Hospitals and Post Graduate Institute, Tirunelveli, Tamil Nadu, India 3 HOD, Paediatric and Strabismus Services, Aravind Eye Hospitals and Post Graduate Institute, Tirunelveli, Tamil Nadu, India 4 Consultant, Cornea and External Diseases, Aravind Eye Hospitals and Post Graduate Institute, Tirunelveli, Tamil Nadu, India 5 Prof of Ophthalmology, Glaucoma Services, Aravind Eye Hospitals and Post Graduate Institute, Tirunelveli, Tamil Nadu, India 6 Statistics, Aravind Eye Hospitals and Post Graduate Institute, Tirunelveli, Tamil Nadu, India
Correspondence Address:
Dr. Venugopal Anitha Department of Cornea, External Diseases and Refractive Surgery, Aravind Eye Hospital and Post Graduate Institute, Tirunelveli, Tamil Nadu India
Source of Support: None, Conflict of Interest: None | Check |
DOI: 10.4103/ijo.IJO_1492_20
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Purpose: The aim of this study was to evaluate the safety, efficacy, and complications of V4c Toric implantable collamer Lens (TICL) implantation for myopic astigmatism in the south Indian population. Methods: In this retrospective observational case series, a total of 109 eyes of 67 patients who underwent V4c TICL implantation (ICL, V4C Staar Surgical, Nidau, Switzerland) between January 2012 and August 2019 were studied with a minimum follow-up period of 6 months (mean 24 months). The main outcome measures were objective and subjective refraction, uncorrected distance visual acuity, corrected distance visual acuity (CDVA), safety, predictability, adverse events, and postoperative complications. Results: At 6 months, mean manifest refractive spherical equivalent (SE) decreased from -10.90 ± 3.7D preoperatively to -0.02 ± 0.13D postoperatively (P < 0.001) and mean cylinder decreased from -2.3 ± 1.3 D preoperatively to -0.04 ± 0.2 D postoperatively (P < 0.001). Postoperatively, SE within ± 0.5 D and ± 1.0 D of attempted correction were achieved in 96.3 (105 eyes) and 100% (109 eyes), respectively. Manifest refractive cylinder within ± 0.5 D and ± 1.0 D of attempted correction were achieved in 97.2 (106 eyes) and 100% (109 eyes), respectively. Sixty-two percent (68 eyes) showed no change in CDVA postoperatively, and no eye had lost lines of CDVA. The safety index was 1.12, and the efficacy index was 1.10. Complications were seen in two eyes (1.8%) due to high postoperative vault requiring secondary surgical interventions. Conclusion: V4c TICL is a highly effective, safe, and predictable option in treating myopic astigmatism with excellent improvement in vision and spectacle independence.
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