Titles read: "MARVELS OF THE MICROSCOPE - A fly's eye view of things."
United States of America.
Extreme C/Us of a fly - yeuch! Hairy legs and face. A man looks at the fly under a microscope. We see magnified views of a fly's eye (after it has been ripped off). An even more magnified view shows the thousands of double convex lenses in each fly eye.
We see a toy man turning a wheel first through a conventional lens, comparable to the human eye. Then we see the same thing through the multiple lenses of the fly's eyes, which shows hundreds of images at once.