Posters

The use of two 90 degree arc intracorneal ring segments in management of crab claw topographic pattern

Poster Details

First Author: H.Elnashar EGYPT

Co Author(s):    H. Elshawaf   Y. Alsafy   M. Abd Elwahab              

Abstract Details

Purpose:

To assess the visual and refractive out come of using two 90 degree arc intracorneal ring segments (ICRS) in cases with crab claw topographic pattern which indicate the patients have corneal ectasia which may be pellucid marginal degeneration (PMD) or pellucid like keratoconus (PLK)

Setting:

International eye hospital

Methods:

A case series of 7 eyes ( 4 patients) underwent two 90 degree ICRS in each eye using femtolaser to create intrastromal tunnels for management of crab claw topographic pattern with at least 6 months follow up .full examination was performed pre and post operative including uncorrected visual acuity (UCVA),best corrected visual acuity ( BCVA) , manfiest refraction of patient and keratometric readings

Results:

The follow up period range from 6 months to 2 years . Only one intraoperative complication occurred in which small perforation into anterior chamber occurred and after 2 weeks reimplantation of 90 degree ICRS in new tunnel which was little superficial and central than the old perforated one . All eyes showed improvement in UCVA, BCVA, manifest refraction and k-reading .the UCVA preoperativebrange from (0.05-0.2)and post operative range from (0.8-1.00)and BCVA preoperative range from (0.1-0.5) and postoperative (0.9-1.0) and manifest sphere preoperative range from (+0.5 to +3.50) with no significant change in post operative and manifest cylinder preoperative range from (-10.0 to - 6.0) and post operative range from (-3.0 to - 0.75) .

Conclusions:

The implantation of two 90 degree arc ICRS using femtolaser in crab claw pattern either diagnosed as PMD or PLK in early or advanced cases give good refractive and visual results

Financial Disclosure:

None