Document Detail

Effect of photorefractive keratectomy and laser in situ keratomileusis in high myopia on logMAR visual acuity and contrast sensitivity.
MedLine Citation:
PMID:  12747534     Owner:  NLM     Status:  MEDLINE    
PURPOSE: To compare effect of photorefractive keratectomy (PRK) and laser in situ keratomileusis (LASIK) on contrast sensitivity (CS) and best corrected visual acuity (BCVA) in high myopia. METHODS: 38 myopes (PRK) and 31 patients (LASIK) were examined before and 1, 3, 6, and 12 months postoperatively. Mean preoperative spherical equivalent was -8.0 +/- 1.7D (PRK) and -9.2 +/- 2.1D (LASIK). CS was tested on a computerized system of the Contrast Sensitivity 8010 Type at 6 spatial frequencies (0.74 and 29.55 c/deg), BCVA was measured on logMAR charts. RESULTS: At 12 months postoperatively, mean spherical equivalent was -0.6 +/- 1.0D (PRK) and -1.0 +/- 0.8D (LASIK). Postoperative values of CS were significantly higher in the PRK group, except for spatial frequencies of 3.69 and 7.39 c/deg up to 3 months postoperatively. The initial significant decrease of BCVA lasted up to 6 months after PRK. In the LASIK group BCVA was not significantly different from its preoperative level at the 3-months follow-up. CONCLUSIONS: The significant improvement of CS after PRK suggest that PRK can improve quality of vision in eyes with high myopia. Although recovery of BCVA after LASIK was faster than after PRK, there may be a persistent decrease in CS.
Hana Langrová; Matthias Derse; Dagmar Hejcmanová; Alena Feuermannová; Pavel Rozsíval; Markéta Hejcmanová
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Publication Detail:
Type:  Comparative Study; Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Acta medica (Hradec Králové) / Universitas Carolina, Facultas Medica Hradec Králové     Volume:  46     ISSN:  1211-4286     ISO Abbreviation:  Acta Medica (Hradec Kralove)     Publication Date:  2003  
Date Detail:
Created Date:  2003-05-15     Completed Date:  2003-06-11     Revised Date:  2008-11-21    
Medline Journal Info:
Nlm Unique ID:  9705947     Medline TA:  Acta Medica (Hradec Kralove)     Country:  Czech Republic    
Other Details:
Languages:  eng     Pagination:  15-8     Citation Subset:  IM    
University Hospital in Hradec Králové, Department of Ophthalmology, Czech Republic.
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MeSH Terms
Contrast Sensitivity
Keratomileusis, Laser In Situ*
Lasers, Excimer
Myopia / physiopathology,  surgery*
Photorefractive Keratectomy*
Refraction, Ocular
Visual Acuity

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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