Purchase this article with an account.
Jesus Merayo-Lloves, Jose F. Alfonso, Carlos Lisa, Dagoberto Almanzar, Miguel Naveiras, Begona Baamonde; Ferrara-type Intracorneal Ring Segments In Keratoconus With Coincident Topographic And Comatic Axis. Invest. Ophthalmol. Vis. Sci. 2012;53(14):4057.
Download citation file:
© ARVO (1962-2015); The Authors (2016-present)
To evaluate efficacy, predictability and safety of Ferrara Type intracorneal ring segment (ICRS) implantation for refractive corrections of paracentral keratoconus.
Snellen uncorrected distance visual acuity (UDVA), best corrected visual acuity (CDVA) and residual refractive errors were recorded before and after 6 months post-Ferrara Type ICRS implantation after tunnel creation with femtosecond laser in 56 eyes of 49 patients with keratoconus. Power vector and Alpins method were used to analyze refractive outcomes after the surgery.
Mean UDVA was 0.17 + 0.14 before and 0.41 + 0.28 after surgery (P < 0.001). CDVA changed from 0.70 + 0.18 before to 0.80 + 0.17 after surgery (P < 0.0001). The efficacy index was 0.60. 5 of the eyes lost 1 lines of CDVA, 17 eyes had unchanged their CDVA, 15 eyes gained 1 line, 9 eyes gained 2 lines, 7 eyes gained 3 lines and 3 eyes gained 4 lines of CDVA. The safety index was 1.14. Spherical equivalent and astigmatism components were highly reduced after ICRS implantation (P < 0.01). Target and surgical induced astigmatism revealed that 78.6 % of eyes were + 1.00 D. No intraoperative and postoperative complications occurred in these eyes.
ICRS implantation in paracentral keratoconus provided good visual and refractive outcomes, indicating that it is a predictable and safe procedure for refractive correction of this type of keratoconus.
This PDF is available to Subscribers Only