Fig. 3
From: The effect of molecular weight of hyaluronic acid on corneal cell viability

The viability results of corneal keratocyte 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% for 24, 48, and 72 h showed that the viability of corneal keratocytes decreased as the concentration of HA increased across all molecular weights. Triton X-100 (TX-100) was used as the positive control of cytotoxicity. Values are presented as mean ± SEM and were obtained from three independent experiments; each experiment was performed in triplicate. * p < 0.05, ** p < 0.01, *** p < 0.001.