What other techniques can be used to determine the refractive error of a child?
Autorefraction and subjective refraction are other techniques to determine refractive error. Autorefraction is a method of retinoscopy that is performed by a computer. This method can be precise, but requires the subject to be still and look at a target for several seconds to obtain an accurate measurement. Subjective refraction is a method that can be used to refine the results of retinoscopy or autorefraction. Subjective refraction requires participation in the process by telling the examiner which of a series of choices of lenses provides the clearest vision.
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