Refractive Outcomes, Contrast Sensitivity, HOAs, and Patient Satisfaction in Moderate Myopia: Wavefront-Optimized Versus Tissue-Saving PRK

Refractive Outcomes, Contrast Sensitivity, HOAs, and Patient Satisfaction in Moderate Myopia: Wavefront-Optimized Versus Tissue-Saving PRK

To compare refractive outcomes, contrast sensitivity, higher-order aberrations (HOAs), and patient satisfaction after photorefractive keratectomy for correction of moderate myopia with two methods: tissue saving versus wavefront optimized. In this prospective, comparative study, 152 eyes (80 patient...

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Bibliographic Details
Published in:Journal of refractive surgery (1995) Vol. 31; no. 10; p. 683
Main Authors: Nassiri, Nader, Sheibani, Kourosh, Azimi, Abbas, Khosravi, Farinaz Mahmoodi, Heravian, Javad, Yekta, Abasali, Moghaddam, Hadi Ostadi, Nassiri, Saman, Yasseri, Mehdi, Nassiri, Nariman
Format: Journal Article
Language:English
Published: United States 01-10-2015
Subjects:
Aberrometry
Adolescent
Adult
Astigmatism - physiopathology
Astigmatism - surgery
Contrast Sensitivity - physiology
Corneal Wavefront Aberration - physiopathology
Double-Blind Method
Female
Humans
Lasers, Excimer - therapeutic use
Male
Myopia - physiopathology
Myopia - surgery
Patient Satisfaction - statistics & numerical data
Photorefractive Keratectomy - methods
Prospective Studies
Refraction, Ocular - physiology
Young Adult
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Summary:To compare refractive outcomes, contrast sensitivity, higher-order aberrations (HOAs), and patient satisfaction after photorefractive keratectomy for correction of moderate myopia with two methods: tissue saving versus wavefront optimized. In this prospective, comparative study, 152 eyes (80 patients) with moderate myopia with and without astigmatism were randomly divided into two groups: the tissue-saving group (Technolas 217z Zyoptix laser; Bausch & Lomb, Rochester, NY) (76 eyes of 39 patients) or the wavefront-optimized group (WaveLight Allegretto Wave Eye-Q laser; Alcon Laboratories, Inc., Fort Worth, TX) (76 eyes of 41 patients). Preoperative and 3-month postoperative refractive outcomes, contrast sensitivity, HOAs, and patient satisfaction were compared between the two groups. The mean spherical equivalent was -4.50 ± 1.02 diopters. No statistically significant differences were detected between the groups in terms of uncorrected and corrected distance visual acuity and spherical equivalent preoperatively and 3 months postoperatively. No statistically significant differences were seen in the amount of preoperative to postoperative contrast sensitivity changes between the two groups in photopic and mesopic conditions. HOAs and Q factor increased in both groups postoperatively (P = .001), with the tissue-saving method causing more increases in HOAs (P = .007) and Q factor (P = .039). Patient satisfaction was comparable between both groups. Both platforms were effective in correcting moderate myopia with or without astigmatism. No difference in refractive outcome, contrast sensitivity changes, and patient satisfaction between the groups was observed. Postoperatively, the tissue-saving method caused a higher increase in HOAs and Q factor compared to the wavefront-optimized method, which could be due to larger optical zone sizes in the tissue-saving group.
ISSN:1081-597X
DOI:10.3928/1081597X-20150831-01