The Nidek M3 Autorefractor/Autokeratometer/non-contact tonometer is fully automatic, and uses three axes to track the eye. The M3 also adopts the advanced pupil zone imaging method for refraction
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Auto Refractometer / Auto Keratometer / Non Contact Tonometer / Pachymeter / Optical Biometer
Optometry Optical Machine, Auto Refractor Optometry