Fig. 1.

The ALTP was used to target the conjunctiva. a The right eye of each rat was selected for the test by targeting 3 spots of the conjunctiva at 11–13 o’clock positions (yellow arrows). b the left eye was used as the control. c the putative spots were not observable after 1 week. No abnormal irritations/complications including conjunctival chemosis, redness, discharge, and lid swelling were also identified