Streak Retinoscope is an Ophthalmic Instrument which is used to objectively determine the refractive error of an eye. Streak Retinoscope is an Ophthalmic Instrument which is used to objectively determine the refractive error of an eye. It is a Streak and Spot Retinoscope in one and is converted by simply changing the bulb. Retinoscope with C size battery handles in case or zipper pouch packing.