Description: Fully refurbished. Included: Phoropter head (REF 559 105), Control desk (REF 559 204), Central unit (REF 559 280), Data transmission cables, Power cable. Haag Streit/Möller-Wedel International Visutron 900+ is an automated phoropter system used to determine subjective refraction in ophthalmic and optometric settings. The compact phoropter head features a minimal viewing thickness of 26 mm to reduce potential instrument myopia during examination.