They may look as ridiculous as they sound but phoropters are essential eye-doctoring devices. These overgrown binoculars help optometrists measure an individual's refractive error, more commonly known as your eyeglass prescription, since the 19th century. Our friends at Oobject have collected the very best examples of phoropters since the Victorian Era.
15 Ophthalmological Marvels That Make Your Eyesight As Clear As Your Hindsight
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