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orange peel

One of several common optical surface defects, orange peel is the uneven or dimpled appearance of a lens surface that has been improperly or insufficiently polished or coated. This appearance is common on fire-polished molded lenses, or a break down in the hard coating or anti-reflective coating of a lens that is also caused by too much heat, both giving rise to the physical appearance of that of an orange peel.
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