2009, Number 1
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ABSTRACTObjective: an epidemiological study was carried out to assess the prevalence of myopia among school age children of suburban population.
Methods: a cross sectional and descriptive study was applied, we stratified a randomized clusters of samples, using a representative proportion of the population. There were 1138 students enrolled, including 612 boys and 524 girls. Visual acuity with Snellen card was assessed; the refractive status and corneal radius of each student were measured with an autorefractometer which did not include cycloplegic refraction. All status refractive values were confirmed by another optometrist. Specific questionnaires were used in order to collect data on the refractive condition of students. The criterion for classifying the myopia status was 0.5 dioptries.
Results: the mean age was 10.2 ± 2.43 years; lower prevalence rates were found significatively in male subjects.
Conclusions: the myopia prevalence was 33.0 %, and the probability of myopia increases with age, sex, parental history of myopia, and history of premature children and low birth weight.
Grosvenor T. Refractive anomalies. Research and clinical applications. Boston; Butterworth-Heinemann; 1991. p. 1-14.
Sawl SM, Katz J, Schein OD, Chan TK. Epidemiology of myopia. Epidemiol Rev 1996;18(2): 175-187.
Mutti DO, Zadnik K, Adams AJ. Myopia. The nature versus nurture debate goes on. Invest Ophthalmol Vis Sci 1996;37(6):952-957.
Saw SM, Chew SJ. Myopia in children born premature or with low birth weight. Acta Opthalmol Scand 1997;75(5):548-550.
Quinn GE, Dobson V, Repka MX, Reynolds J, Kivlin J, Davis B, et al. Development of myopia in infants with birth weights less than 1251 grams. The Cryotherapy for Retinopathy of Prematurity Cooperative Group. Ophthalmology 1992;99(3): 329-340.
Zadnik K, Satariano WA, Mutti DO, Sholtz RI, Adams AJ. The effect of parental history of myopia on children’s eye size. JAMA 1994;271(17):1323-1327.
Parssinen O, Lyyra AL. Myopia and myopic progression among schoolchildren: a three year, follows up study. Invest Ophtalmol Vis Sci 1993; 34(9);2794-2802.
Garner Lf, Owens H, Kinnear RF, Frith MJ. Prevalence of myopia in Sherpa and Tibetan children in Nepal. Opt Vis Sci 1999;76(5):282-285.
Garner LF, Kinnear RF, Klinger JD, McKellar MJ. Prevalence of myopia in school children in Vanuatu. Act Ophthalmol 1985;63(3):323-326.
Mavracanas TA, Mandalos A, Peios D, Golias V, Megalou K, Gregoriadou A, et al. Prevalence of myopia in a sample of Greek students. Acta Opthalmol Scand 2000;78(6):656-659.
Robinson BE. Factors associated with the prevalence of myopia in 6-year- old. Opt Vis Sci 1999;76(5): 266-271.
Juárez-Muñoz IE, Rodríguez-Godoy ME, Guadarrama-Sotelo ME, Guerrero-Anaya M, Mejía-Aranguré JM, Sciandra-Rico M. Frecuencia de trastornos oftalmológicos comunes en población preescolar de una delegación de la Ciudad de México. Salud Publica Mex 1996;38(3):212-216.
Robinson B, Bobier WR, Martin E, Bryant L. Measurement of the validity of a preschool vision screening program. Am J Public Health 1999;89(2): 193-198.
Keeffe JE, Lovie Kitchin JE, Maclean H, Taylor HR. Prueba de tamizaje simplificada para identificar personas con visión disminuida en países en desarrollo. Panam J Public Health 1998;3(4): 220-226.
Miller D. Epidemiology of the refractive errors. En: Yannoff M, Duker JS, editors. Ophthalmology. London UK: Mosby; 1999. p. 2-8.
Hernández B, Velasco-Mondragón HE. Encuestas transversales. Salud Publica Mex 2000;42(5): 447-455.
Mutti DO, Zadnick K, Kegashira S, Kish L, Twelker JD, Adams AJ. The effect of cycloplegia on measurement of the ocular components. Invest Ophthalmol Vis Sci 1994;35(2):515-527.
Lin L, Shih YF, Tsai CB, Chen CJ, Lee LA, Hung Pt, et al. Epidemiologic study of ocular refraction among schoolchildren in Taiwan in 1995. Opt Vis Sci 1999;76(5):275-281.
Adams DW, McBrien NA. Prevalence of myopia and myopic progression in a population of clinical microscopists. Optom Vis Sci 1992;69(6):467-473.