Autorefractor is a common word used in the field of optometry, which refers to a medical device used to measure the refraction of the eye. One synonym for autorefractor is "refractometer," which implies that the device is used to measure the refractive index of the eye. Another term used to refer to an autorefractor is "ophthalmometer," implying that the device is used to measure the power of the eye. Other synonyms for autorefractor include "auto keratometer", "auto refractometer" or "automatic refractometer". All of these synonyms are used interchangeably in the field of optometry, referring to a device used to accurately measure the refractive status of the eye.