Impact of Cosmetics on the Physical Dimension and Optical Performance of Silicone Hydrogel Contact Lenses.
OBJECTIVE
To evaluate the impact of cosmetics on silicone hydrogel (SiHy) contact lens shape, lens power, and optical performance.


METHODS
In this in vitro experiment, 7 SiHy materials were coated with 9 marketed brands of cosmetics, including hand creams (HCs) (3), eye makeup removers (MRs) (3), and mascaras (3). Diameter, sagittal depth, and base curve were determined using the Chiltern (Optimec Limited), whereas lens power and optical performance were assessed using the Contest Plus (Rotlex). Six replicates were used for each lens and cosmetic combination. Measurements were repeated after a cleaning cycle using a one-step hydrogen peroxide solution.


RESULTS
Makeup removers had the greatest impact on diameter, sagittal depth, and base curve, resulting in changes of up to 0.5, 0.15, and 0.77 mm, respectively. The HCs and mascaras had little impact on these parameters; however, differences were observed between lens types. Optical performance was reduced with all mascaras, and a decrease of greater than 2 units on a 0 to 10 scale (10=uniform power distribution) was seen for 5 lens types exposed to waterproof mascara (P<0.01). Most HCs and MRs had minimal impact on image quality. Lens power did not change with any of the cosmetics (± 0.25 diopter; P>0.05). Lens cleaning resulted in some recovery of the lens parameters, and efficiency varied between cosmetics.


CONCLUSIONS
Some eye MRs and waterproof mascaras changed the shape and optical performance of some SiHy lenses. Further research is needed to understand the clinical implications for SiHy lens wearers using cosmetics.
Centre for Contact Lens Research, School of Optometry and Vision Science, University of Waterloo, Waterloo, ON, Canada.
Doerte
D
Luensmann
Mili
M
Yu
Jeffery
J
Yang
Sruthi
S
Srinivasan
Lyndon
L
Jones
D003263:Contact Lenses, Hydrophilic; D003358:Cosmetics / Q000009:adverse effects*; D004209:Disposable Equipment; D006801:Humans; D020136:Hydrogel, Polyethylene Glycol Dimethacrylate; D012828:Silicones; D063465:Skin Cream / Q000009:adverse effects
D003358:Cosmetics; D012828:Silicones; D020136:Hydrogel, Polyethylene Glycol Dimethacrylate