American Optical AO 11640

This American Optical AO 11640 is a used classic manual phoropter, a mainstay of American optometric practices for decades, now offered in checked working condition. The AO 11640 delivers the fundamental refraction functions clinicians rely on, letting them dial through sphere and cylinder power while rotating the axis to pinpoint a patient's refractive error. Its all-metal build and traditional dial layout give it the familiar tactile feel that many long-practicing optometrists still favor over newer digital units. The instrument includes the standard auxiliary lens set and Risley prism controls necessary for phoria testing, binocular balance, and near-point vision assessment, supporting a complete manual refraction exam from distance to near. Its mechanical simplicity also means fewer components prone to electronic failure, an appealing trait for practices wanting a dependable long-term instrument or a backup unit for their primary lane. It mounts to standard stands and wall arms common in most exam rooms. This used AO 11640 suits optometry practices, teaching clinics, and optical museums or collectors interested in a functioning example of American Optical's refraction engineering. We recommend verifying stand and mounting compatibility with your existing setup, and we can provide additional photos or answer condition questions before you commit to purchase.