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espanolSe diseno y analizo un screening visual en preescolares de 4-5 anos de edad. Se obtuvo informacion de la prevalencia de las condiciones oculares entre estos preescolares. Se evaluo la salud visual de un grupo de 127 ninos con un examen completo en su propia escuela. Si el nino fallaba uno o mas test era referido al oftalmologo. De los ninos revisados en el estudio, el 61% supero los test de agudeza visual y retinoscopia, al 17% se le refirio al oftalmologo y el 22% sera controlado anualmente. Valores de agudeza monocular/binocular peores de 0.5/0.6 son demasiado bajos para ninos de 4 anos de edad, mientras que estos limites se incrementan a 0.6/0.8 para ninos de 5 anos. En conclusion, la prevalencia de problemas de vision sin detectar en ninos preescolares ha sido claramente demostrada. Sin embargo, es necesaria la coordinacion entre profesionales que realicen el screening, personal del colegio y padres para alcanzar niveles altos de exito. Los resultados de este estudio validan una bateria rapida de test. El screening visual ha sido altamente fiable porque los valores normales de referencia han sido definidos analizando estadisticamente los resultados de estos tests. EnglishA vision screening program for preschool children of 4-5 years old was designed and analyzed. Information of the prevalence of ocular conditions among preschool children was obtained. The vision health of a group of 127 children was evaluated by a comprehensive examination in their own school. If a child failed one or more screening tests, he was referred to the ophthalmologist. Of the children screened in this study, 61% passed distance visual acuity and retinoscopy tests, 17% were referred to the ophthalmologist and 22% will be annually monitoring. Values of monocular/binocular acuity worse than 0.5/0.6 are too poor for 4 years old children, whereas these limits increase up to 0.6/0.8 for 5 years old children. In conclusion, the prevalence of undetected vision problems in preschool children has been clearly demonstrated. Vision screening programs in schools are highly recommended. Nevertheless, coordination among professionals conducting screening, school personnel and parents are needed to reach high levels of success. The results of this study validate an easy and fast battery of tests. The vision screening has been highly reliable because reference normal values have been defined by analyzing statistically the results of these tests.

Reference normal values and design of a vision screening for 4 to 5 years old preschoolers