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Simultaneous topography-guided partial photorefractive keratectomy (PRK) and corneal collagen cross-linking (CXL) in keratoconus

Poster Details

First Author: A.Gupta INDIA

Co Author(s):                  

Abstract Details



Purpose:

Our experience in simultaneous topography-guided partial photorefractive keratectomy (PRK) and corneal collagen cross-linking (CXL) in keratoconus.

Setting:

Advanced Eye Centre, Postgraduate Institute of Medical Education and Research, Chandigarh, India

Methods:

Seven eyes with progressive keratoconus and contact lens intolerance were included. Inclusion criteria were corneal thickness not less than 500 microns, ablation not exceeding 50 microns. Simultaneous PRK with CXL was performed in all eyes using the Athen's Protocol. Primary outcomes studied were visual outcome, keratometric outcome and changes in corneal biomechanics. Secondary outcome was postoperative corneal haze and improvement in contact lens tolerance.

Results:

Snellen's visual acuity changed from preoperative value of 6/12 in 2 eyes and 6/9 in 5 eyes to postoperative value of 6/9 in 5 eyes and 6/6 in 2 eyes. Spherical refractive error changed from -1.21 ± 0.8 D to -0.03 ± 0.3 D, cylindrical refractive error changed from -2.92 ± 1.09 D to -1.711 ± 0.9 D and mean refractive spherical equivalent changed from -2.67 ± 1.8 D to -0.57 ± 0.08 D. Maximum keratometry changed from 53.96 ± 5.6 D to 50.8 ± 5.8 D. Central corneal thickness changed from 494.12 microns to 397.14 microns. Corneal hysteresis changed from 9.7 ± 2.1 to 5.02 ± 1.8 and corneal resistance factor changed from 8.52 ± 2.02 to 5.7 ± 1.3. Corneal haze was grade 1 in only 2 eyes.

Conclusions:

Simultaneous topography guided partial photorefractive keratectomy and corneal collagen cross-linking is safe and effective to halt the progression of keratoconus. FINANCIAL INTEREST: NONE

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