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As with nearly all excimer laser based refractive surgery, hyperopic correction can be performed with both conventional ablation and wavefront-guided custom ablation.

This article will be published soon. See LASEK for similar procedure.
 

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Video courtesy University of Illinois Eye & Ear Infirmary.

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Current PRK Medical Journal News...

Aspheric profile versus wavefront-guided ablation photorefractive keratectomy for the correction of myopia using the Allegretto Eye Q.

Related Articles

Aspheric profile versus wavefront-guided ablation photorefractive keratectomy for the correction of myopia using the Allegretto Eye Q.

Eur J Ophthalmol. 2009 Jul-Aug;19(4):544-53

Authors: Ghoreishi SM, Naderibeni A, Peyman A, Rismanchian A, Eslami F

PURPOSE. To compare the results of photorefractive keratectomy (PRK) with Q-factor customized aspheric ablation and wavefront-guided customized ablation for correction of myopia compound with astigmatism. METHODS. Fifty-six patients were enrolled in this prospective controlled study. In each patient, one eye was randomly assigned for treatment with the Q-factor customized PRK (custom-Q study group) and the other eye treated with wavefront-guided customized PRK. Preoperative and 3-month postoperative manifest refraction, contrast sensitivity, visual acuity, aberrometry, and asphericity of the cornea were compared between the two groups. All eyes were treated with the Wavelight Eye-Q 400 Hz excimer laser in a single refractive surgery center by a single surgeon. RESULTS. Uncorrected visual acuity (UCVA) improved to 20/20 or more and 20/25 or more in 34 eyes (60.7%) and 56 eyes (100%), respectively, in the wavefront-guided ablation group and in 36 eyes (64.2%) and 54 eyes (96.4%) in the custom-Q ablation group. All eyes had UCVA of 20/40 or better. A total of 54 eyes (96.4%) in the wavefront-guided ablation group and 56 (100%) in the custom-Q ablation group had spherical equivalent (SE) within -/+0.5 D. One eye in each group (2%) lost >/=2 lines of best-corrected visual acuity (BCVA). High order root mean square (RMS) in the wavefront-guided group was 0.3630-/+0.13 mum preoperatively and 0.427-/+0.17 at 3 months (p=0.2). In the custom-Q ablation group it was 0.329-/+0.092 preoperatively and 0.4730-/+0.181 at 3 months after PRK (p=0.08). CONCLUSIONS. Regarding safety and refractive efficacy, custom-Q ablation profiles were clinically equivalent to wavefront-guided profiles in corrections of myopia up to -6.00 D and astigmatism up to 2.50 D.

PMID: 19551667 [PubMed - in process]