Critical response Variety gave the film a negative review, calling the film "dull" and criticizing the film's direction, story, and jumbled ideas.
TV Guide awarded the film a mixed two out of four stars, noting the film's "novel" special effects, but felt that the film 'wasted the opportunity to explore its subject'.
Time Out London gave the film a mostly positive review, calling it "An engaging fantasy with brilliantly executed (though mostly rather unimaginative) special effects which look back to
The Devil Doll and forward to
The Incredible Shrinking Man. Let down by a dull supporting cast, but retrieved by the attractively pale, tremulous Technicolor." Dennis Schwartz from ''Ozus' World Movie Reviews'' rated the film a grade B+, commending Dekker's performance while also noting that the film was "one of those bad films that is good because it's so much fun, and its noteworthy trick photography is effectively used for its dazzling special effects – way before the use of CGI". Film historian
John Brosnan has written of
Dr. Cyclops: "It's a fast-paced, inventive film though the dialogue is awful and the acting is undistinguished with the exception of Albert Dekker's portrayal of Dr Thorkel. As with
Charles Laughton's version of Dr. Moreau, his evil is not a byproduct of scientific zeal but a deliberate choice of action. The special effects deserve a mention, being ingeniously contrived and rather convincing, but the film is also noteworthy for its two unintentional references to the war that was about to engulf the world and end with the prospect of a nuclear apocalypse - Thorkel draws the power for his device from a 'radium mine' and, with his shaven head and thick, round glasses, he resembles the wartime caricature of the 'beastly Jap'". ==Home media==