Reading performance after implantation of a modified corneal inlay design for the surgical correction of presbyopia: 1-year follow-up

摘要

Purpose: To evaluate change in different reading performance parameters after monocular ACI7000PDT corneal inlay implantation for the improvement of near and intermediate vision. Design: Prospective, interventional case series. Methods: Twenty-four patients were scheduled for corneal inlay implantation in the nondominant eye in a university outpatient surgery center. Naturally emmetropic and presbyopic patients between 45 and 60 years of age, with uncorrected distance visual acuity of at least 20/20 in both eyes, without any additional ocular pathology were eligible for inclusion. Bilateral uncorrected reading acuity, mean and maximum reading speed, and smallest log-scaled print size were evaluated with the standardized Radner Reading Charts. Measurements of reading parameters and reading distance were performed with the Salzburg Reading Desk (SRD). Minimum postoperative follow-up was 12 months. Results: The reading desk results showed significant changes in each parameter tested. After 12 months the mean reading distance changed from the preoperative value of 46.7 cm (95% CI: 44.1-49.3) to 42.8 cm (95% CI: 40.3-45.3, P <.004), and the mean reading acuity "at best distance" improved from 0.33 logRAD (95% CI: 0.27-0.39) to 0.24 logRAD (95% CI: 0.20-0.28, P <.005). Mean reading speed increased from 141 words per minute (wpm, 95% CI: 133-150) to 156 wpm (95% CI: 145-167, P <.003), maximum reading speed increased from 171 wpm (95% CI: 159-183) to 196 wpm (95% CI: 180-212, P =.001), and the smallest print size improved from 1.50 mm (95% CI: 1.32-1.67) to 1.12 mm (95% CI: 1.03-1.22, P <.001). Conclusions: After ACI7000PDT implantation, there were significant changes in all tested reading performance parameters in emmetropic presbyopic patients. These 1-year results indicate that the inlay seems to be an effective treatment for presbyopia.