Eyewitness to Murder (1990)

A beautiful artist stumbles onto a murder just as the killer is leaving. After he levels a brutal blow to her head, she wakes up blind, and the only witness to the murder. Now in the frightening darkness, she must find her way through a dangerous world where killers stalk the innocent and cops are scarce. Two overworked, angry detectives are assigned to hunt down the killer, and to keep the witness safe.