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A new 355 degree intracorneal ring segment for management of keratoconus, one year follow-up

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Session Details

Session Title: Refractive Corneal Surgery

Session Date/Time: Wednesday 17/09/2014 | 08:00-09:30

Paper Time: 09:13

Venue: Boulevard A

First Author: : T.A. Wahab EGYPT

Co Author(s): :                  

Abstract Details

Purpose:

To assess the visual, refractive and corneal aberrometric outcomes after the implantation of 355 D Intra-corneal Ring Segment (ICRS) in keratoconus cases , one year follow up .

Setting:

Clear Vision Center , cairo, Egypt

Methods:

Fifty eyes of 37 patients suffering from Keratoconus have been treated by a 355 ICRS. Corneal tunnels of 6 mm in diameter at 70% corneal depth have been created using Intralase Femtosecond laser,. Sixteen patients were male and 4 were female. The age of the patients ranged from 20 years to 42 years (mean 26 years). Eight eyes suffered from mild (average central K-reading (ACK) < 48 diopters (D)), nine eyes from moderate (48 D < ACK < 52 D) and eight eyes from advanced (ACK > 52 D) Keratoconus. Main criteria for success was patient satisfaction and uncorrected distance visual acuity (UDVA). A further decision criterion for the postoperative enhancement strategy was a particular topographic pattern criterion in the postoperative tangential map. Postoperative 1 year follow-up

Results:

After initial implantation the average improvement in UDVA was 8.4 lines. Three eyes out of the 25 eyes treated (12%) received a postoperative optimization procedure either by exchanging the implant for one with another thickness or by removal & reimplantation 2 months later. After optimization the average improvement in UDVA in the entire group (25 eyes) was 10.5 lines. No intraoperative complications were seen.

Conclusions:

The presented 355 Degree ICRS has refractive myopic correction through corneal re-modeling, may reduce vertical coma Z (3, -1), and RMS value of HOAs aberrations in eyes with central keratoconus, providing an improvement of UDVA and CDVA values.

Financial Interest:

NONE

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