Eye protection in psoralen photochemotherapy

Abstract
The optical performance of some commercially-available tinted lenses [to prevent cataracts] is discussed. There is a wide variation in the UV absorbing power of sunglasses although adequate protection against solar UV-A can be achieved with some, but not all, polarizing material. The darkness of a tint is not an indication of its likely performance within the UV bands and it is possible that lenses could be produced that lacked any significant tint yet absorbed strongly throughout the UV region. [Oral psoralen photochemotherapy (PUVA) is now widely used for the treatment of human psoriasis and other skin diseases.].

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