Population-Based Study of Presbyopia in Rural Tanzania

Burke, A.G.; Patel, Ilesh; Muñoz, Beatriz; Kayongoya, Andrew; Mchiwa, Wilson; Schwarzwalder, Alison; West, Sheila K.

doi:10.1016/j.ophtha.2006.01.030

Cited by 101 publications

(133 citation statements)

References 10 publications

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“…This is similar to findings from a recent survey in Kenya (W. Mathenge, unpublished data presented at OSEA, Kampala, Uganda, 2005) and Tanzania. 10 The free movement of many older people, as evidenced by our inability to trace 17 people at follow-up, also limits interpretation.…”

Section: Discussionmentioning

confidence: 98%

Acceptance of cataract surgery in a cohort of Tanzanians with operable cataract

Chibuga

Massae

Geneau

et al. 2007

Eye

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Background In spite of recent increases in the number of surgeries carried out within some hospitals and programmes in sub-Saharan Africa, there are indications that the acceptance of cataract surgery remains quite low. Methods We conducted a population-based prospective (cohort) study of cataract patients from 12 villages in Hai district of Kilimanjaro region, Tanzania. Those identified with operable cataract were informed of the regular community programmes (within 5 km) in place providing transportation and high-quality surgery. At years 1 and 2 after the survey, we traced the patients to determine uptake of cataract surgery. Results Among patients eligible for surgery (128), 31 could not be followed up after 1 year due to deaths, moving, and refusal. Among the remaining patients, 18 accepted surgery in the first year and four accepted in the second year. Among these 22 patients, only five were blind or with severe visual impairment. The most elderly were those least likely to accept surgery. Discussion Even with bridging strategies in place to make cataract surgery accessible and affordable, the uptake of cataract surgery remains low. Strategies aimed to identifying and referring all patients recognizing vision loss as a personal disability rather than using predefined vision cutoffs will likely be most successful in reducing the burden of vision loss due to cataract.

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Section: Discussionmentioning

confidence: 98%

Acceptance of cataract surgery in a cohort of Tanzanians with operable cataract

Chibuga

Massae

Geneau

et al. 2007

Eye

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“…3 As such, the second phase of the VISION2020 global initiative for the elimination of avoidable blindness, outlining the proposed plan for 2006-2011, has recognized uncorrected presbyopia as a significant cause of avoidable visual impairment. 1 The current study sample was a rural population in Kenya and the presented research assessed the prevalence of presbyopia, resulting functional impairment, and spectacle use among persons with presbyopia.…”

Section: Presbyopia Related Functional Impairment and Spectacle Usementioning

confidence: 99%

“…7 In Kongwa, the odds of developing presbyopia increased by 16% per year of age from 40 to 50 years of age, but the increase was not significant after 50 years of age, at 1% per year. 3 This suggests that the majority of changes in the lens involving the development of presbyopia occur before 50 years of age. In order to assess the risk factors for the development of presbyopia, Laviers studied subjects between 40 and 50 years of age in a Tanzanian population.…”

Section: Risk Factorsmentioning

confidence: 99%

Presbyopia, Related Functional Impairment, and Spectacle Use in Rural Kenya

Sherwin¹,

Mathenge²

2012

US Ophthalmic Review

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Presbyopia is the age-related loss of accommodation and is often associated with a progressive inability to read fine print and to write. Worldwide, it is estimated that 45 million people are blind, but this figure does not take into account the number with uncorrected presbyopia, the estimate of which is unknown. 1 The International Centre for Eyecare Education (ICEE) states that presbyopia affects 170 million people in sub-Saharan Africa, with over 7 million presbyopes in Kenya from a population of approximately 30 million, 2 of whom the majority will be uncorrected.The last few years have seen a discernible rise in research investigating the epidemiology, impact on quality of life, and management of presbyopia in low-and middle-income regions. Burke et al., authors of a large populationbased study of presbyopia in Tanzania, concluded that the 'VISION2020:The Right to Sight' refractive error agenda should place increased emphasis on targeting presbyopia. MethodsNakuru District is situated in the Rift Valley in Kenya, where a large percentage of the rural population are subsistence farmers earning less than $2 per day. For the purposes of our study, we selected clusters of people over 50 years of age through probability proportionate to size, and individuals were selected within clusters through compact segment sampling. Of those enumerated, 134 (93.1%) were willing to participate.Four were excluded because they did not see at least 3/60 (best corrected visual acuity [BCVA]) in either eye.Participants were given a short questionnaire evaluating their near-visionrelated functional impairment and history of spectacle use. Patients were also examined for presbyopia using a near-vision chart in English and local languages, but were not corrected for distance vision. Patients were excluded if they were bilaterally blind (BCVA <3/60 with a Logmar 'E' chart at 6m). All participants were given free spectacles for near vision if they required them and if they wanted them. We only assessed functional presbyopia, which we defined as 'requiring at least +1.00 diopter (D) in order to read the N8 optotype at a distance of 40cm in the participant's usual visual state.' Subsequently, subjects included myopes who were able to see N8 despite having lost the ability to accommodate. Subjects who were not functionally presbyopic but who had presbyopia following distance correction (objective presbyopes) were not included. Participants were also tested for near vision with reading glasses if they owned them and had them present at the time of the examination. PrevalenceWe examined 130 subjects, and found that the prevalence of presbyopia in the >50 years of age population was 85.4%. Of the participants with presbyopia, the mean age was 61.5 years and 39.6% were male. Due to differences in the age range of the subjects (see Table 1) and in the definition of presbyopia, 5 it is difficult to compare our estimated prevalence of presbyopia with the few reported findings of other population-based studies from low-or middle-income regions...

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“…Duarte et al, in Brazil estimated the prevalence of presbyopia in 3,000 adults of 30 years and older at 54.7 percent [17]. Although some studies reported the prevalence of presbyopia over the age of 30 years but it appears that the highest incidence of presbyopia is among 40 years of age and older [18]. Some studies examined for functional presbyopia while others examined for objective presbyopia [19].…”

Section: Discussionmentioning

confidence: 99%

“…The last few years have seen a discernible rise in research investigating the epidemiology, impact on quality of life, and management of presbyopia in low-and middleincome regions. Burke et al, authors of a large populationbased study of presbyopia in Tanzania, concluded that the 'VISION2020: The Right to Sight' refractive error agenda should place increased emphasis on targeting presbyopia [13].…”

Section: Introductionmentioning

confidence: 99%

The Prevalence of Presbyopia in optometry clinic for one year

Ahmed

Mahmud

2017

KJAR

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Presbyopia is a natural part of the aging process of the eye in which the loss of flexibility of the crystalline lens takes place over a number of years. This study aimed to determine the prevalence of presbyopia for all cases in the clinic of optometry in Erbil Technical Medical Institute for one year. During the study period optometric and ophthalmologic examinations were performed on all participants. Near vision was tested and corrected to the nearest 0.5 diopters. Presbyopia was defined as at least 1 line of improvement on a near visual acuity chart with an addition of a plus lens. presbyopic correction coverage was calculated and the results were analyzed using SPSS Program. A total of 750 participants' records were evaluated. Of those, 450 cases were females and 300 cases were males. Two hundred-twenty -five (30 %) of patients were presbyopia. Fifty-one patients of presbyopic patients (22.66%) were with ages between 39-45 year, seventy-five patients (33.33%) were with ages between 46-50 year, forty patients (17.77%) were with ages between 51-55 year, seventeen patients (7.55%) were with ages between 56-60, thirteen patients (5.77%) were with ages between 61-65 year, twenty patients (8.88%) were with ages between 66-70 year, six patients (2.66%) were with ages between 71-76 year, three patients (1.33%) were with ages between 76-80 year. Our study is the first population-based investigation of presbyopia in Erbil Clinics, with the aim of determining the prevalence of presbyopia in the clinic of Optometry that it is a sample of Kurdistan Region population. The results of this study indicate that the presbyopia was a common problem of the vision in Erbil.

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Population-Based Study of Presbyopia in Rural Tanzania

Cited by 101 publications

References 10 publications

Acceptance of cataract surgery in a cohort of Tanzanians with operable cataract

Acceptance of cataract surgery in a cohort of Tanzanians with operable cataract

Presbyopia, Related Functional Impairment, and Spectacle Use in Rural Kenya

The Prevalence of Presbyopia in optometry clinic for one year

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