They may look as ridiculous as they sound but Phoropters are essential eye-doctoring devices. These overgrown binoculars have helped 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.

When you're done looking through these, check out these submarine-less periscopes and a dozen bespectacled architects.

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Rodenstock Phoropter

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Reichert Model 11625 Ultramatic Phoropter

Classic Bausch and Lomb Phoropter

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Reichert Plus Cylinder Phoroptor

Phoropter on aircraft carrier USS John F. Kennedy

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Remote vision automated wireless phoropter

Phoropter in action

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Vintage 1930s Phoropter

Contemporary electronic phoropter

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Pink Bausch and Lomb Phoropter

19th Century Phoropter

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Rodenstock Phoropter, Phorolux Model

Moller Phoropter, Model Visutest D

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Portable Phoroptor - for picnics?

Parts of the Phoropter, labeled

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