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Free surface nickel in CE‐marked and non‐CE‐marked spectacle frames
Author(s) -
Walsh G.,
Mitchell J. W. C.
Publication year - 2002
Publication title -
ophthalmic and physiological optics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.147
H-Index - 66
eISSN - 1475-1313
pISSN - 0275-5408
DOI - 10.1046/j.1475-1313.2002.00018.x
Subject(s) - nickel , dimethylglyoxime , nickel titanium , titanium , alloy , metal , materials science , metallurgy , optometry , medicine , shape memory alloy
Three hundred and ninety‐five new frames were tested for evidence of nickel release using dimethylglyoxime and ammonia. For areas of CE‐marked frames in direct contact with the skin a considerable improvement was found over the previous such survey by the authors, carried out before the widespread introduction of CE marking. However, free nickel was found in 6.5% of CE‐marked metal frames (excluding titanium and titanium alloy) in such areas and a majority of half joints. Some titanium alloy frames also tested positive for nickel in areas in contact with the skin.