ARPE-19 cell viability assayed by measuring LDH release following dyes treatment.

<p>The cells were treated with 0.05 mg/ml indocyanine green (ICG), acid violet (AcV), brilliant blue (BriB) and methyl blue (MetB) for 3 minutes (<b>A</b>) or 30 minutes (<b>B</b>) in BSS. Data are expressed as percentage of control, and shown are mean results ± SEM of three independent experiments run in triplicate on cultured cells. Statistical significance is indicated by *p<0.05 and **p<0.01 versus control.