<prompt> Lid retraction is caused by?BimatoprostLatanoprostBrimonidineApraclonidine  <response>: Ref:KD Tripathi pharmacology 7th edition page.no: 154 Apraclonidine causes eyelid retraction due to stimulation of a1 receptor. Brimonidine cause less prominent lid retraction due to weaker a1 activity Ref-Drug facts and comparison 20062257 