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 spool snugly fastened around the sleeve. Multimetre readings were taken in ohms (Ù). Eight ophthalmologists performed 1200 in each mode totalysing 2400 readings. Average and standard deviation of the readings in each mode were determined, as well as the variation coefficient in order to allow comparison of results in millimetre and Ù. RESULTS: Based on the proposed method it was possible to estimate hyperopia up to +4,00 D. CONCLUSION: Accuracy and reproducibility in experimental hyperopia of an artificial eye was feasible up to +4,00 D.
Retinoscopy; Amblyopia; Hyperopia
