12 Interesting Facts Which You May Or May Not Know About Frog Eyes

Ever wanted a frog for a pet? 

These little creatures can be incredibly adorable with those bulging eyes and springy jumps.

On the other hand, Mother Nature can be deceptive as some of the most beautiful multicolored frogs in the world are also equally deadly.

With names like Poison dart or Golden poison, we should have guessed it, huh? 

Frogs are fascinating creatures and today we shall feature top 12 fun things you probably didn’t know about frog’s vision.


1. Swallow with their eyes

Did you know that frogs swallow food with the help of their eyes? 

Frog’s eyes usually bulge out when they are out there and chilling.

However, if you were to observe them when it eats, you will see that the eyeballs will retract into its head after it catches its prey.

This retraction action actually helps to push food down so that the frog can swallow.

Check out the video below for detail explanation.

2. Frogs have three eyelids

Strange but totally true. 

These eyes lids have functional purposes. There is one eyelid on the top, and another on the bottom.

The third one, called a nictitating membrane, serves to lubricate and protect the eyes as the frog navigates from water to land. 


3. Do frogs actually sleep?

Well… with all those fancy eyelids, frogs better be doing some eye closing action. 

Frogs have been observed to be able to sit very still with their eyes closed. The assumption is that they are sleeping.

However, whether or not they actually do sleep, is still a mystery out there for us to discover. 


4. Help! My eyes can’t move.

Ever wondered why frog’s eyes are so big and bulging? 

Unlike humans, frogs cannot move their eyes within their eye sockets.

Therefore, their eyes evolved to be really big so that they can have surround vision, like almost 360 degrees.


Frog Field of vision

5. Stick them out

The thing is, frogs can’t turn their heads because their necks are virtually non existent.

Their placement of eyes have evolved to on top of their head so that they can look out for food and enemies better.

So much for a sneak attack, huh?


6. Nearsighted

If frogs were humans, you would have to give them eyeglasses, or better still, make them do eye exercises!

Jokes aside, frogs are generally nearsighted, as compared to humans. They can only see well at a distance. 

Unlike humans, where the shapes of lens of our eyes changes as we accommodate to see, frogs move their lens backwards and forward, like camera lens, to help them to see properly.


7. Wolverine, anyone?

If their eyes structure become somewhat damaged, frogs can regenerate them, just like Wolverine. Groovy, eh?

Knowing how that mechanism work may pave important insight on vision regeneration.

There are currently studies that focus on exploring the regenerative abilities of frogs’ eyes as a basis for blindness prevention in humans.


8. Move it, baby

Interestingly for frogs, their vision had evolved to be extremely sensitive to moving objects. Like flies. 

So that is to say, if a frog is surrounded by dead flies, it is likely to literally starve to death despite being surrounded food because it simply cannot see them. 


9. Night vision

Frogs are nocturnal animals, so it makes sense for them to be able to see in dark.

The ability to see in the dark is due to this tissue called tapetum lucidum, which kinda functions like a mirror inside the eye. 

This tissue helps to reflect and collect ambient light between the back of the eye and cornea, so that frogs can see at night. 

This tissue is also the reason why frogs have eyeshine, just like cats, when you take a photo of them at night.  

And nope, humans don’t have it. 


10. Color Detection

While we cannot yet determine how much color frogs can see, one thing we can be sure is that they are definitely not colorblind. 

For humans, we detect colors through photoreceptors, in the form of rods and cones in our eyes. Frogs do the same thing too. 

The only difference is that, while we only have one type of photoreceptor rod, frog eyes contain two types of photoreceptor rods.

This additional photoreceptor allows frogs to detect blue light far more superiorly than humans. It is also thought to provide color detection in very low light environments for frogs, when other animals can only detect shades of grey in the same situation.


11. Sexy times

So...how do you tell a male frog from a female frog?

I reckon it would still be rather rude to stare down at the genitals for some gender recognition, even by frogs standards.

Luckily for frogs, they utilize their color vision as a cue to choose their mates. This ability to differ in color between the male and female species has a fancy scientific term - sexual dichromatism. 

Male frogs are usually significantly more colorful than female ones, as with most species that spot sexual dichromatism in nature. This showy event makes it easier to attract the attention of female frogs, especially crucial when it comes to sexy times for the frogs.


12. Boring eyes? Never.

You will be amazed by the different colors and designs that frogs eyes come in. It can range from speckled black to gold to multi-colored orange blue. 

The eyes of the blue eyed bush frog are fascinating. Go google it. 



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