Reference seeing distance

Reference seeing distance

Agreed distance of 250 mm between the object side (first) nodal point of the eye and the object observed. The reference seeing distance is used, above all, as a reference parameter for calculating the magnification of optical instruments used for near vision.

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Part of Speech: noun
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Industry/Domain: Eyewear
Category: Optometry
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reference seeing distance

Eyewear; Optometry

Agreed distance of 250 mm between the object side (first) nodal point of the eye and the object observed. The reference seeing distance is used, above all, as a reference ...

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