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Year : 2018  |  Volume : 7  |  Issue : 1  |  Page : 7-13

Visual and refractive outcomes of combined excimer laser ablation with accelerated corneal collagen cross-linking in subclinical keratoconus

Ophthalmology Department, Medical College, Taif University, Taif, Saudi Arabia

Correspondence Address:
Talal A Althomali
Taif University, P.O. Box 795, Code 21944, Taif
Saudi Arabia
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Source of Support: None, Conflict of Interest: None

DOI: 10.4103/sjhs.sjhs_119_17

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Purpose: The purpose of the study was to evaluate efficacy, safety, and stability of visual and refractive outcomes of combined photorefractive keratectomy (PRK) with accelerated corneal collagen cross-linking (CXL) in subclinical keratoconus. Materials and Methods: This retrospective study included 140 eyes (75 patients) with subclinical keratoconus which underwent simultaneous topography-guided PRK with acceleratedCXL (2.7 J/cm2). Outcome measures were pre- and postoperative uncorrected distance visual acuity (UDVA) and corrected distance visual acuity (CDVA), manifest refraction, and keratometry. Results: Refractive and keratometric parameters demonstrated statistically significant improvement from baseline to postoperative 12 months. UDVA of ≥20/20 was achieved in 90.7% (127/140) eyes and ≥20/40 in 96.4% (135/140) eyes at last follow-up. Regarding refractive outcomes, 94.3% (132/140) eyes were within ± 1.00 D of attempted refractive correction and 82.9% (116/140) eyes had astigmatism of ≤0.25D postoperatively as compared to 22.9% (32/140) eyes at preoperative levels. Regarding safety, 90.7% (127/140) eyes maintained their preoperative CDVA and 7.2% (10/140) eyes lost ≥2 lines of CDVA. Complications included corneal haze in 7.14% (10/140) and corneal ectasia in 0.7% (1/140) eyes. Conclusion: During the 12-month follow-up, combined topography-guided PRK and accelerated CXL provided good visual and refractive outcomes offering spectacle independence in subclinical keratoconus eyes; however, development of one case of ectasia (0.7%) indicates compromised safety and seems to suggest that utilizing 2.7 J/cm2 energy for CXL procedure may not be adequate.

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