Fig. 1.

Relative cell survival of primary human conjunctival goblet cell (GC) cultures assessed through lactate dehydrogenase (LDH) assays. Results are presented as mean cell survival relative to a fixed 100 % survival for the control ± standard deviation. Cultures were incubated for 30, 60 and 120 min with polyquarternium‐1 (PQ)‐ or benzalkonium chloride (BAK)‐preserved travoprost eye drops. Cultures from three individual donors were included. The large bar shows significant decrease in GC survival after 2 hrs incubation with the generic BAK‐preserved travoprost eye drops compared to the control. There were no differences in survival between the control and Travatan at any time point. Only p‐values <0.05 are shown.