Functional presbyopia in a rural Kenyan population: the unmet presbyopic need

Clinical & Experimental Ophthalmology
Justin C SherwinWanjiku Mathenge

Abstract

Presbyopia is the most common reason for requiring spectacles in low-income regions, although the unmet need for presbyopic spectacles in these regions is very high. The aim of this study was to estimate the prevalence of presbyopia, and the functional impairment and spectacle use among persons with presbyopia in a rural Kenyan population. A cross-sectional study was carried out in the Rift Valley, Kenya. Clusters were selected through probability-proportionate to size sampling, and people aged >/=50 years within the clusters were identified through compact segment sampling. Within the context of this survey, 130 eligible participants were selected for interview and underwent near-vision testing. Functional presbyopia was defined as requiring at least +1.00 dioptre in order to read the N8 optotype at a distance of 40 cm in the participant's usual visual state. Participants were corrected to the nearest 0.25 dioptre in order to see N8. Unmet and met presbyopic need, and presbyopic correction coverage were calculated. Functional presbyopia was found in 111 participants (85.4%). Mean age was lower in those with presbyopia (64.1 years vs. 71.5 years, P = 0.004). Increasing degree of addition required to see N8 was significantly ass...Continue Reading

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Citations

Jan 27, 2012·Ophthalmic & Physiological Optics : the Journal of the British College of Ophthalmic Opticians (Optometrists)·Srinivas MarmamulaGullapalli N Rao
May 29, 2010·The British Journal of Ophthalmology·Ilesh PatelSheila K West
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Nov 6, 2008·Clinical & Experimental Ophthalmology·Ilesh Patel, Sheila K West
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May 10, 2020·BMC Ophthalmology·Minychil Bantihun MunawNebiyat Feleke Adimassu
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