An Auto-Refractometer with Keratometer is an automated optical diagnostic instrument used in eye clinics and hospitals to measure refractive errors (such as myopia, hyperopia, and astigmatism) and assess the curvature of the cornea (keratometry).

It combines two key functions — autorefraction and keratometry — in one device, providing quick, accurate, and objective measurements essential for prescribing corrective lenses and for contact lens fitting.