ABSTRACT Objective: To assess the performance of a portable autorefractor as refractor and screening tool for refractive errors in schoolchildren. Methods: Cross-sectional observational study. Refractometric measurements of children between 5 and 10 years old were obtained through four methods: 2WIN under non-cycloplegic conditions, and 2WIN, conventional autorefractor, and retinoscopy, under cycloplegic conditions. Correlations and agreement between the methods and accuracy of the portable autorefractor to define whether to prescribe glasses were assessed. Results: The mean age ± standard deviation was […]

ABSTRACT Objective: Evaluate the sensitivity, specificity e accuracy of the ocular refraction measured by the 2WIN® photoscreener as a screening method to identify children in need of spectacles prescription according to the criteria published by the Brazilian Society of Pediatric Ophthalmology (BSPO) in asymptomatic children, 6 to 36 months old, and determine the impact of cycloplegia in the sensitivity, specificity and accuracy of this method. Methods: One hundred seventy-eight (178) eyes of asymptomatic children between the ages of 6 and […]

OBJECTIVE: Evaluate accuracy and reproducibility of streak retinoscopy without neutralising lenses in experimental hyperopia of an artificial eye. METHODS: Observe a Welsh Allynretinoscope streak through the pupil of an artificial eye prepared do show hyperopia from +1,00 D to +8,00 D. The streak was moved while varying its width by sliding the sleeve upwards until neutralisation point. The retinoscope was fitted either with a millimetre scale under the sleeve or with a multimetre connected to a rheostat driven by a […]