Allison Crawford is blind, though there's nothing physically wrong with her eyes. What did Allison see that was so shocking it mentally snapped her vision closed?
This concept alone opens up lots of possibility doors and windows. However, the screenplay writer Julian Zimet decided to go for the weakest of the scenarios available. When the mystery is revealed, though you've probably worked it out well before then, you may feel a little letdown... I know I did.
I don't know if this is the same climax the Francoise Des Ligneris novel has, not having read it, but it could have been a little stronger and believable. This, however, is a small point as the direction and the acting should have you hooked before you get close to the ending.
Alexander Singer uses his cast well and isn't adverse to use them to create a few iconic shots. Some nice close-ups are stronger thanks to the casts acting skills. You can see the worry, the concern, the cunning, and the realisation on their faces. I have to admit I still believe both Patricia Neal and Ian Bannen are miss-cast. They are both good in their portrayals but don't quite hit the mark. It's Samantha Eggar who steals the show as the cunning and oh-so-sexy and sensual sister, Robin. I have to say I even loved the sci-fi reading Grandma played brilliantly by Beatrix Lehmann. Though it's Curd Jurgens as Eric Crawford who surprised me the most. Being the crux of the story, you would have thought it strange for him to be cast as this type of character. But he comes across as strong and reassured that I could believe the notion thoroughly.
This is a good film that verges on greatness. If the story had been reworked a little tighter and the Neal and Bannen characters had been better cast, well, who knows? As it stands though, I would gladly recommend the film to all lovers of mysteries, thrillers, and dramas alike. This is a nice way to spend a wet Sunday afternoon. Along with with your beloved, a warm fire, and a tipple of one kind or another.