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Free surface nickel in CE-marked and non-CE-marked spectacle frames
1Department of Vision Sciences, Glasgow Caledonian University, UK. gwa@gcal.ac.uk
Summary
Nickel release from CE-marked spectacle frames has improved but remains a concern. Some metal and titanium alloy frames still release nickel, particularly at the joints, posing a risk for sensitive individuals.
Area of Science:
- Materials Science
- Analytical Chemistry
- Dermatology
Background:
- Nickel release from spectacle frames is a known cause of allergic contact dermatitis.
- CE marking aims to ensure product safety, including the reduction of allergenic materials.
- Previous surveys indicated significant nickel release from spectacle frames.
Purpose of the Study:
- To assess nickel release from new CE-marked spectacle frames.
- To compare current nickel release levels with pre-CE marking introduction data.
- To identify specific frame types and areas with higher nickel release.
Main Methods:
- Tested 395 new spectacle frames for nickel release.
- Utilized dimethylglyoxime and ammonia spot tests.
- Focused on areas in direct skin contact and half joints.
Main Results:
- A considerable improvement in nickel release was observed compared to previous surveys.
- Free nickel was detected in 6.5% of CE-marked metal frames (excluding titanium/titanium alloys) in skin-contact areas.
- Nickel was also found in a majority of half joints and some titanium alloy frames in skin-contact areas.
Conclusions:
- While CE marking has reduced nickel release, it has not been entirely eliminated.
- Certain metal and titanium alloy spectacle frames continue to pose a nickel allergy risk.
- Further vigilance and potentially stricter regulations are needed for allergenic materials in eyewear.