<prompt> Latanoprost used topically in glaucoma primarily acts byDecreasing aqueous humor forma onIncreasing uveo scleral outflowReleasing papillary blockIncreasing trabecular outflow  <response>: Latanoprost - 0.0005 synthetic drug which is an ester analogue of prostaglandin F2 alpha , It is only drug which exclusively acts by increasing uveo scleral outflow and by causing reduction in episcleral venous pressure. Side effects - conjunctival hyperaemia, foreign body sensation and increased pigmentation of the iris. 