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Prevalens av och orsak till synnedsättning hos ghanansk population
Linnaeus University, Faculty of Health and Life Sciences, Department of Medicine and Optometry.
2016 (Swedish)Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
Abstract [sv]

Syfte: Syftet med studien var att undersöka prevalensen av synnedsättning hos hjälpsökande i Ghana under en resa med Vision for All. Vilken är den vanligaste orsaken till synnedsättning?

Metod: Mätningarna genomfördes runt olika städer i Ghana under månadsskiftet mars/april 2016. 228 personer deltog i studien, varav 96 män och 132 kvinnor. Medelåldern hos deltagarna var 51 ± 17 år. Åldersspridning hos alla deltagare var 6-86 år. Synskärpa undersöktes med hjälp av en Snellen-tavla med E-hakar, och med hjälp av provbåge med tillhörande provglas korrigerades eventuella synfel. Vid eventuell synnedsättning undersöktes deltagaren med ett oftalmoskop för att hitta synliga hinder för synskärpan. Deltagarna kategoriserades efter World Health Organizations kategorisering av synnedsättning och blindhet.

Resultat: Totalt 41 personer hade synnedsättning innan korrektion för synfel, vilket ger en prevalens av 18,0%. Av dessa 41 personer var 19 män och 22 kvinnor. Inget signifikant samband hittades mellan kön och synnedsättning. Monokulär och binokulär synnedsättning varierade mellan de olika kategorierna. Totalt 16 (39,0%) personer har en synnedsättning till följd av katarakt, 10 (24,4%) av okorrigerade synfel, 3 (7,3%) av kongenitala omständigheter, 3 (7,3%) av korneal opacitet, 2 (4,9%) av pterygium, 1 (2,4%) av misslyckad kataraktoperation, 1 (2,4%) av mässling, 1 (2,4%) av trauma och 1 (2,4%) av tumör.

Slutsats: Studien visar en prevalens av synnedsättning på 18,0%. Inget signifikant samband mellan kön och synnedsättning hittas. Den vanligaste orsaken till synnedsättning hos deltagarna var katarakt, och den näst vanligaste okorrigerade synfel.

Abstract [en]

The aim of this study was to investigate the prevalence of visual impairment of a ghanaian population seeking visual aid during a trip with Vision for All. In addition, to evaluate the most common causes for visual impairment in that population.

Measurements were performed in different cities around Ghana during a period of three weeks. In total 228 persons participated in this study, out of these 96 were men and 132 were women. The average age of the participants were 51 ± 17 years, and the age ranged from 6 to 86 years old. Visual acuity was measured using a Snellen E-chart and uncorrected refractive errors were corrected using either trial lenses or flippers. If any visual impairment was present the participant was further examined with an ophtalmoscope to identify its cause. The participants were divided according to WHO’s categorization of visual impairment and blindness.

41 persons out of 228 had a visual impairment before accounting for uncorrected refractive error which gives a prevalence of 18.0%. Out of these 41 persons 19 were men and 22 women. No significant correlation between gender and visual impairment was found. Monocular and binocular visual impairment varied between the different categories. In total 16 (39.0%) persons had a visual impairment due to cataract, 10 (24.4%) due to uncorrected refractive errors, 3 (7.3%) due to congenital conditions, 3 (7.3%) due to corneal opacities, 2 (4.9%) due to pterygium, 1 (2.4%) due to a failed cataract surgery, 1 (2.4%) due to measles, 1 (2.4%) due to trauma and 1 (2.4%) due to a tumour.

The prevalence of visual impairment in this study was 18.0%. No significant correlation between gender and visual impairment was found. The most common cause of visual impairment was due to cataract, and the second most common cause was due to uncorrected refractive errors.

Place, publisher, year, edition, pages
2016. , 21 p.
Keyword [sv]
Synnedsättning, Ghana, Vision for All, WHO
National Category
Other Medical Sciences
Identifiers
URN: urn:nbn:se:lnu:diva-54488OAI: oai:DiVA.org:lnu-54488DiVA: diva2:945749
Subject / course
Optometry
Educational program
Optometry Programme, 180 credits
Supervisors
Examiners
Available from: 2016-07-13 Created: 2016-07-03 Last updated: 2016-07-13Bibliographically approved

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