Eye refractometer having a viewing target projecting system

Eye refractometer for measuring a refractive power of a patient's eye, which comprises a target projecting optical system having an optical axis and objective lens means for projecting a measuring target by an infrared ray against the patient's eye, an observing system including means for converting a target image of the infrared ray as produced at fundus of the patient's eye into a visible image, said measuring target being provided in the projecting optical system for movement along said optical axis so that the refractive power of the patient's eye is determined from position of the measuring target when a focused target image is produced at the fundus of the patient's eye, a viewing target provided in said projecting optical system and located more distant from said objective lens means than said measuring target, filter means provided between said measuring and viewing targets and having a portion substantially corresponding to the viewing target means, said portion of the filter means being transparent to visible lights and the remainder of the filter means being transparent to an infrared ray but opaque to visible lights, said measuring and viewing targets and the filter means being connected together so that they are moved simultaneously.