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Spectral
Absorption
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All NoIR filters absorb ultraviolet
radiation (UV A, B and C) to 400nm—radiation that
is causally related to cataract formation. Many NoIR filters
absorb additional visible light energy to provide a more
comfortable viewing experience. This visible absorption
protects the retina against long-term exposure to high-energy
wavelengths, which are associated with the deterioration
of the center of the retina and may contribute to macular
degeneration.
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