Boston Type 2 keratoprosthesis- mid term outcomes from a tertiary eye care centre in India

To analyse the anatomical and functional outcomes of Boston type II keratoprosthesis at a tertiary eye care centre in South India. Retrospective chart review of 10 patients operated with Boston keratoprosthesis Type 2 between Feb 2013 and June 2017 were analysed. Outcome measures analysed included, visual outcome, device retention and postoperative complications. The most common indication for surgery was SJS in 80% (8 of 10 eyes). Mean follow-up duration was 2.75 years (0.5-5 years, SD -1.71, median 32 months) Postoperative visual acuity improved to better than 20/200 in 7 eyes and better than 20/30 in 6 eyes with device retention in 9 eyes at last follow-up. Pre-existing glaucoma was noted in 1 eye. RPM was noted in 1 eye, retinal detachment in 1 eye, endophthalmitis in 1 eye and sterile melt requiring kpro replacement in 1 eye. No progression or development of glaucoma was noted postoperatively in any eye. Boston type 2 keratoprosthesis is a viable option to restore vision in patients with end stage ocular surface disorders. Though the procedure can be associated with complications, early as well as late, our midterm outcome appears to be encouraging.