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Home Made Heterophoria Test
Mid-Late 20th c.
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Maddox Wing Test
20th c.
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Maddox Wing Test
Early-mid 20th c.
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Maddox Wing Test
Clement Clarke Ltd
Late 20th c.
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Maddox Wing Test
20th c.
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Maddox Wing Test
Theodore Hamblin Ltd
1920s
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Maddox Wing Test
Hamblin (Instruments) Ltd
Mid-Late 20th c,
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Mills Near Balance Test
1950s
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Reading Card from a Foriagraph
Ellis Optical Co
1930s
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Rosen Foriagraph
c.1930
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Rosen Foriagraph
c.1930
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Rosen Foriagraph
c.1930
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The Foriagraph
20th c.
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The Improved Foriagraph Unit
Elliott Optical Co Ltd
1930s
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