Pilot study for a blindness prevalence survey in the state of Sonora Mexico

J. Rodriguez, M. G. Ramirez, C. A. Munoz, Beatriz Munoz, Sheila K West

Research output: Contribution to journalArticle

Abstract

Purpose. To establish the feasibility of carrying out a population based blindness survey in Mexican Hispanics 40 years and older of the state of Sonora. Methods. A community was randomly selected from all communities within 2 hours drive from the city of Nogales. A house to house census identified 178 persons age 40 and older of which 171 (96%) completed a home questionnaire. All persons were asked to be examined at a central site within the town. In 3 days, 2 ophthalmologist, and an ophthalmic technician performed ophthalmic examinations on 118 of the 178 eligible individuals; an additional 43 persons arrived at the site but were not examined due to time constraints. 16 persons (9.9%) refused to participate. Results. The prevalence of diabetes by self description was 11.3%, a figure comparable to others reported from Mexico City. 30% of the participants had presenting visual acuity worse than 20/40 in the better eye, but 78% of them improved with refraction to 20/40 or better. 3.4% had cataract surgery in at least one eye and 12.7 has some lens opacity. Conclusion. This pilot study shows the feasibility of carrying out a survey for visual impairment in a stable Hispanic population, and the full study will provide much needed data on blindness and visual impairment in a Hispanic population.

Original languageEnglish (US)
JournalInvestigative Ophthalmology and Visual Science
Volume37
Issue number3
StatePublished - Feb 15 1996

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Blindness
Mexico
Hispanic Americans
Vision Disorders
Cataract
Ego
Population Dynamics
Censuses
Population
Visual Acuity
Surveys and Questionnaires

ASJC Scopus subject areas

  • Ophthalmology

Cite this

Pilot study for a blindness prevalence survey in the state of Sonora Mexico. / Rodriguez, J.; Ramirez, M. G.; Munoz, C. A.; Munoz, Beatriz; West, Sheila K.

In: Investigative Ophthalmology and Visual Science, Vol. 37, No. 3, 15.02.1996.

Research output: Contribution to journalArticle

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abstract = "Purpose. To establish the feasibility of carrying out a population based blindness survey in Mexican Hispanics 40 years and older of the state of Sonora. Methods. A community was randomly selected from all communities within 2 hours drive from the city of Nogales. A house to house census identified 178 persons age 40 and older of which 171 (96{\%}) completed a home questionnaire. All persons were asked to be examined at a central site within the town. In 3 days, 2 ophthalmologist, and an ophthalmic technician performed ophthalmic examinations on 118 of the 178 eligible individuals; an additional 43 persons arrived at the site but were not examined due to time constraints. 16 persons (9.9{\%}) refused to participate. Results. The prevalence of diabetes by self description was 11.3{\%}, a figure comparable to others reported from Mexico City. 30{\%} of the participants had presenting visual acuity worse than 20/40 in the better eye, but 78{\%} of them improved with refraction to 20/40 or better. 3.4{\%} had cataract surgery in at least one eye and 12.7 has some lens opacity. Conclusion. This pilot study shows the feasibility of carrying out a survey for visual impairment in a stable Hispanic population, and the full study will provide much needed data on blindness and visual impairment in a Hispanic population.",
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