Ophthalmic Optics第 22 / 100 题
One prism diopter of power displaces an image by how much and at what distance?
a.1 mm at 1 meter
b.1 cm at 1 meter
c.1 m at 1 meter
d.1 inch at 1 foot
解析
One prism diopter deviates a ray of light 1 centimeter at a distance of 1 meter. Prism diopters are the standard unit for specifying and measuring prismatic effect.
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