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. 2019 Jun 16;11(6):1050. doi: 10.3390/polym11061050

Figure 3.

Figure 3

The coefficient of friction of the multipurpose contact lens care solution or the care solution without γ-PGA. When contact lenses were rubbed against the glass in the commercial care solution Hydron, the multipurpose care solution, or the solution without γ-PGA, the coefficients of friction were all lower than that of PBS. The friction coefficient increased in the absence of γ-PGA compared with the solution containing γ-PGA. When comparing with the friction coefficient of PBS, * p < 0.05, ** p < 0.01, and *** p < 0.001.