Reference: 1. Zheng Y, Dou J, Wang Y, et al. Sustained release of a polymeric wetting agent from a silicone-hydrogel contact lens material. ACS Omega. 2022;7(33):29223-29230. doi: 10.1021/acsomega.2c03310.
Important information for PRECISION7® (serafilcon A) and PRECISION7® (serafilcon A) for Astigmatism contact lenses: For daily wear or extended wear up to 6 nights for near/far-sightedness. Risk of serious
eye problems (i.e., corneal ulcer) is greater for extended wear. In rare cases, loss of vision may result. Side effects like discomfort, mild burning or stinging may occur.
See product instructions for complete wear, care and safety information. 
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