Dispensing第 65 / 100 题
Wrap angle (face-form) that is too aggressive on a high-powered Rx can cause what?
a.Better peripheral vision
b.No optical effect
c.Unwanted prism and blur unless the lens is compensated
d.Lighter weight
解析
Excess wrap tilts the lens relative to the line of sight, inducing unwanted cylinder and prism, especially in stronger prescriptions. Compensated (wrap) lens designs correct for this tilt.
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