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Examines bias affecting retinoscopy outcomes in naive clinicians, indicating significant errors due to misinformation.
There is general agreement that the results of subjective refraction are subject to the influence of bias. We have studied the influence of bias in retinoscopy, a test in which subject response is not required. After noting falsified prior information about the patient's subjectively determined refractive status naive clinicians tended to err in their retinoscopic determination in the direction of the falsification. While the effect averaged less than 0.25 D it was significant at the 2% level.
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Reimerst et al. (1973) studied this question.
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