Fig. 1
From: The effect of molecular weight of hyaluronic acid on corneal cell viability

The viability results of corneal epithelial cell cultures exposed to very low (VLMW), low (LMW), middle (MMW), and high molecular weight (HMW) hyaluronic acid (HA) at concentrations ranging from 0.025 to 0.5% over periods of 24, 48, and 72 h. Triton X-100 (TX-100) was used as the positive control of cytotoxicity. Values are presented as mean ± SEM and originated from three independent experiments; each experiment was performed in triplicate. * p < 0.05, ** p < 0.01, *** p < 0.001.