Advertisement

In the animal world, how does the vision of hunters and predators differ?

Dr. Michael Roizen, MD
Internal Medicine
One of the key differences in animals is that hunters have binocular vision to focus on prey, while the hunted have peripheral vision to better locate potential predators.

For instance, spiders see much in the same way do, but their systems work a little differently. They move their retinas to focus (whereas human change the shape of their lens). If they want to see further away, they push their retina closer, while the lens stays fixed.

Flies, on the other hand, have multiple solar plates on their corneas, and each one of them focuses light. That gives them a very fragmented view of the world, as I'm sure you've seen in movies. They don't see anything well, but they see everything panoramically. And that makes sense; flies don't need to focus on calculators and classified ads; they just need to see enough to avoid a flyswatter or horse's tail-or a spider web, when they can help it.
YOU: The Owner's Manual, Updated and Expanded Edition: An Insider's Guide to the Body that Will Make You Healthier and Younger

More About this Book

YOU: The Owner's Manual, Updated and Expanded Edition: An Insider's Guide to the Body that Will Make You Healthier and Younger

Between your full-length mirror and high-school biology class, you probably think you know a lot about the human body. While it's true that we live in an age when we're as obsessed with our bodies as...

Continue Learning about Eye and Vision

Looking for Stroke Risks in Eyeball Photos
Looking for Stroke Risks in Eyeball Photos
A picture may be worth a thousand words, but one good image of your eye’s inner workings may be even more precious: It could predict your risk of faci...
Read More
The 411 on Eye Care for Your Kids
The 411 on Eye Care for Your Kids
How often have you told your kids to crunch on carrots because they’re good for their eyes? Maybe you’ve scolded them for sitting too close to the TV,...
Read More
7 Foods for Healthy Eyes
7 Foods for Healthy Eyes7 Foods for Healthy Eyes7 Foods for Healthy Eyes7 Foods for Healthy Eyes
For brighter eyes and clearer vision, these foods can help. Cooked kale, spinach, collards and turnip greens (along with broccoli and eggs) are cramm...
Start Slideshow
Can Eyes Be Transplanted?
Can Eyes Be Transplanted?

Important: This content reflects information from various individuals and organizations and may offer alternative or opposing points of view. It should not be used for medical advice, diagnosis or treatment. As always, you should consult with your healthcare provider about your specific health needs.