Prevalence and degrees of myopia and hyperopia at Gondar University Hospital Tertiary Eye Care and Training Center, Northwest Ethiopia
Received 5 July 2016
Accepted for publication 6 October 2016
Published 21 November 2016 Volume 2016:8 Pages 85—91
Checked for plagiarism Yes
Review by Single-blind
Peer reviewers approved by Dr Colin Mak
Peer reviewer comments 2
Editor who approved publication: Mr Simon Berry
Destaye Shiferaw Alemu, Alemayehu Desalegn Gudeta, Ayanaw Tsega Ferede, Haile Woretaw Alemu
Department of Optometry, College of Medicine and Health Sciences, Gondar University, Gondar, Ethiopia
Background: Refractive errors are the second and third leading cause of visual impairment and blindness in Ethiopia, respectively. The situation is worse where accessing spectacles, which are the only management option in developing countries, is a major issue. Gondar University Hospital Tertiary Eye Care and Training Center is the only referral eye care center, and it lacks published evidence on the prevalence and degrees of refractive errors (myopia and hyperopia).
Objective: The purpose of this study was to determine the prevalence and degrees of myopia and hyperopia at Gondar University Tertiary Eye Care and Training Center.
Materials and methods: Records of 1,921 patients presented to refraction service at Gondar University Hospital Tertiary Eye Care and Training Center from January 2010 to January 2014 were reviewed. All cases of refractive errors (with visual improvement of at least one line) were converted into spherical equivalents (SE = sphere + ½ cylinder). Myopia was defined as SE ≤ –0.25 D and hyperopia ≥ +0.25 D.
Results: The study comprised of 61.1% males and 38.9% females; the patients had an average age of 40±17 years. The overall prevalence of refractive errors (myopia and hyperopia) was 76.3% (95% confidence interval: 75%–77%). Myopia was present in 34.5% patients and hyperopia in 38.3%. Low-degree hyperopia (86%) and low-degree myopia (49.5%) were the most frequent refractive errors.
Conclusion: Myopia and hyperopia are major reasons for patients to visit Gondar University Hospital Tertiary Eye Care and Training Center. Low-degree myopia and hyperopia were the most common refractive errors. Stocking appropriate power lenses is needed at this tertiary eye care center in order to alleviate this problem in Ethiopia.
Keywords: degree of myopia, hyperopia, Gondar, Ethiopia
Corrigendum for this paper has been published
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