[Binocular diplopia and ptosis due to snakebite (Agkistrodon blomhoffi "mamushi")--a case report].

We treated a patient who developed binocular diplopia and ptosis after being bitten by an Agkistrodon blomhoffi (mamushi). The patient was a 49-year-old man who presented with binocular diplopia after the snakebite on the second finger of his right hand. He experienced local pain and swelling and a few hours later, he developed diplopia.