PURPOSE: Determination of transmittance curves through spetrophotometric measurementes of color filtering lenses submitted to UVA and light visible radiation, and comparison of the results in the band between 320 and 800 nanometres (nm). METHODS: The filtering color of Danny yellow 1, orange, green and grey and Rio de Janeiro yellow 2 lenses have been analyzed using JEM Way model 6.400 spectrophotometer. RESULTS: All lenses showed distinct and variable transmittance in the spectrum of UVA and light visible radiation. In the bands between 320 and 400 nm all lenses showed less than 4% of transmittance. The yellow 1 showed the greatest average (3.7%) while the grey lens showed the smallest average (0.45%). Nevertheless no statistical differences were observed between those lenses. We analyzed the transmittance curve in three different lens positions and no statistically significant differences were found. CONCLUSION: Spectrophotometric properties need to be determined in order to indicate color-filtering lenses with safety. The capacity of filtering light radiation is more important than the fact of being colored or not.
Hydrophilic contact lenses; Ultraviolet spectrophotometry; Eye protective devices; Intraocular lenses; Ultraviolet rays; Radiation; Retina; Light
