In Chicago, a blind woman who has undergone a corneal transplant to restore her sight thinks she may have “witnessed” a murder. But with dimmed vision following the surgery, who’ll believe her? Director Michael Apted’s thriller leads a charmed life thanks to Madeleine Stowe (blind Emma Stowe, who plays folk violin) and Aidan Quinn (John Hallstrom, the “convince me” investigator). Usually, thrillers with such near-incredible premises trip over themselves. But Apted (“Extreme Measures”) is wise enough to let the sassy Stowe thrash free of typecasting. Among the most beautiful women in Hollywood for the better part of two decades, she’s bright, smart-assed, and immensely watchable. Pretty-boy Quinn is her very match in gradually romantic repartee and the two neatly nourish one another. Great? No. Entertaining? Oh yes.