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so diffrenet animals have different things in there eyes ??

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so diffrenet animals have different things in there eyes ??

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can animals have blurry vision?

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Why do we need all the part of the eyes?

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Why did god make our eyes a oval and not a full Circle so WE CAN SEE MORE?

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Why did god make our eyes a oval and not a full Circle so WE CAN SEE MORE?

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What would happen if we lost our ciliary muscles?

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Nocturnal animals's back of the eye are shiny, so the could see very clear in the dark.

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It is very cool that human's pupil grow bigger and smaller.

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becase no light bounce in

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does animal eye and human eye works the same way?

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Does our pupil have a specific size when it grows bigger in the dark

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do they need any light to see such great?

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What happens if we work at night? Will we have the shinny part?

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What would happen if we have a blue reflecting thing at the back of our eyes, like cows do?

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why do different animals have different colored shiny retinas?

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It is possible that some people have shiny stuff at the back of their eye?

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why do nocturnal animals have different colors in the back of their eye?  

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why do nocturnal animals have different colors in the back of their eye?  

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does the pupil have a limit of how big it can grow?

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why do all the animals' have light pupil at night?

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why do all the animals' have light pupil at night?

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what if there is no light? can they still see?

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what if there is no light? can they still see?

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Can animals have blurry vision?

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1. Dogs can only see a limited color range compared to us, will it affect their night vision?
2. Some insects have compound eyes, do they have night vision, and how do their eyes work?
3. Does nocturnal animals have any eyesight problems, how far can they see?

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I want my pupil to get bigger so I can play and I don't need to sleep at night

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If you use the flashlight and take a picture of two different cats,will the eyes be the same color?

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can you be recovered after you are blind?

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can you be recovered after you are blind?

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how come in the video it said that cats eyes are green, but when i tryed this experiment my cats eyes where orange?

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Why does it sometimes look like people have red eyes when their picture is taken using a camera’s flash light?

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why don't animals have eyebrows

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Why do you have blood shot eyes when you use computer too much?

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What is the muscle call?
Why we have different color iris?
Why do animal and human different color retina?

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1.can some animals become blind?
2.what are eyebrows for?

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Is there a way to make our eyes shine in the dark and have great eyesight in the dark like nocturnal animals?

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Does the image on our retina is seeing the up side down image?

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Nocturnal animals tend to have proportionally bigger eyes than humans do. They also tend to have pupils  that open more widely in low light. So nocturnal eyes gather more light than human eyes do. Which fish and sea creatures are nocturnal?

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👇🏻gekko eye

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how did the pupil form? what happens if your pupil expands to much ? why is our retina different from animals? I mean we were born like monkey's at first.

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How come we can't have that shiny layer at the back of our eye? How would it affect us?

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Why do deers always stop in their tracks and get sort-of hypnotized when they see headlights?

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Elliott 4De

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nocturnal animals ave shiny tapetum to see in the dark.

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Watch this it helps your understanding of how eyes work. PS: Here is the link if it dosent work.
https://www.youtube.com/watch?v=i3_n3Ibfn1c

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my model,i look so much like a japanese anime person

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my model,i look so much like a japanese anime person

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hahAhahahah

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If we were looking directly at the sun and our pupils expanded would we be blind? 

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If we were looking directly at the sun and our pupils expanded would we be blind? 

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Why is a dead person’s eyes always closed

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why are human pupils in oval shape?

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nocturnal animals have shiny tapetum to see in the dark

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why do we not have the shiny kind of retina on the back of our eyes?

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what will happen if people are all born blind

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what will happen if people are all born blind

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Darren 4 Xiao

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What if we had that shiny thing at the back of our eyes, then will we be able to see in the dark ???

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What if we had that shiny reflective blue substance in the back of our eye, will there be some problems?

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Will there be some blind people who are not blind when they grow up?

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after looking at a screen for a long time, why does your eyes feel tired?

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why do animals have differnt colors tametums?

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I liked this video, its sort of like the one in school

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Human Eye - The Dr. Binocs Show | Best Learning Videos For Kids | Peekaboo Kidz

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when we are in a dark room for a while and then suddenly someone shines a light at you, why can't you keep your eyes open?

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how would it be if we could see in the dark?

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is there a part of the eye that we don't need to see in the daytime?

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is there any animal in the world that has the same eyes as humans?

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If we were nocturnal  would it effect us

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Do animals have short-sighted?

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What is wrong with our eyes when we are short-sighted?

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How well can owls see in daylight compared to other noctural animals?

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How well can owls see in daylight compared to other noctural animals?

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Why Do These Animals even Have Shiny Layers At The Back of their eyes?

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1.Why are human eyes almond shape, not round or triangle shape?
2.Why can't human do a eye surgery and become a nocturnal animal?

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Is it possible if you are very blind but after a while you can see properly?

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I wonder why your eye must be on your head not your hand or your body?
I also wonder do a eyeball break easyily

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Is it possible if you can be short sighted and long sighted at the same time?
Gemma

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If your pupil is VERY big then does that mean you need sunglasses?

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If your pupil is VERY big then does that mean you need sunglasses?

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If you’re born with eye sight that is blurry, the that is because the eye length is either too short or long!

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If you’re born with eye sight that is blurry, the that is because the eye length is either too short or long!

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I wonder which part of our eye is the most important part.

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Gabby's Question, but also have the great solution

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Gabby's Question, but also have the great solution

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Is there the colour full exact black eye?
Thanks, but I just searched it up and there it goes no true black eye does exit.

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Edmund is a biostatistician with over 10 years of experience in clinical research. He loves to study human-inherited traits.

This is one of those questions that seems like it should have an easy answer when it really doesn't. In fact, there is some debate over what the rarest eye color actually is. This is partly because "rare" itself can be a relative term, since one eye color might be very rare in a certain part of the world and extremely common in another.

Though hard scientific evidence is hard to come by, we can say with certainty what some of the less common colors are.

What Is the Rarest Eye Color?

Eye colors from most rare to most common:

* Green, Amber and Violet/Red (these three are extremely rare)

* Black (no eyes are true black, just very dark brown)

Green Eyes

Though the scientific research is lacking, it is very likely that green is one of the most rare eye colors worldwide. It's commonly quoted that only 2% of the world's population has green eyes, though it's difficult to determine where that number came from.

Even if the number is accurate, 2% of the world's 7.3 billion people is 146 million. This is roughly the population of Russia. That's not to say that green eyes aren't special, because they are! It just depends on where you happen to be. In most parts of the world, almost everyone has brown hair and eyes, with green being very rare or absent altogether.

Green eyes are sometimes confused with hazel eyes, which have both brown and green in them. To tell the difference, go into natural lighting (outside during the day), and look at your eyes compared with someone you know to have green, hazel, or brown eyes. The difference should be clear between them.

Where Do Green Eyes Originate From?

Green eyes are most common in Northern and Central Europe though they can also be found in Southern Europe as well as Western Asia. As was mentioned earlier, brown hair and eyes are dominant in most regions, though there are several countries where it is actually more common to have green or blue eyes than brown eyes.

For example, in Ireland and Scotland, 86% of the population has either blue or green eyes, and in Iceland, 89% of women and 87% of men have blue or green eyes. Among European Americans, green eyes are most common in people of recent Celtic or Germanic ancestry. Green eyes also tend to be more common in women.

Even though they're most common in Northern and Central Europe, people of any race can have green eyes.

Celebrities with Green Eyes

Adele

Emma Stone

Amanda Seyfried

Clive Owen

Jon Hamm

Eddie Redmayne

Kate Middleton

Gael Garcia Bernal

Violet and Red Eyes

This might be disappointing for some, but true violet or red-colored eyes do not occur naturally in humans. Some eyes, however, can appear to be violet under certain lighting or makeup conditions.

Elizabeth Taylor is famous for her violet eyes, though in reality she just has very blue eyes that can look violet depending on the lighting. She does, however, have a row of double eyelashes, a rare genetic mutation.

People with albinism, a condition that causes a complete lack of or very low levels of pigment in the skin, hair, and eyes, sometimes appear to have violet or red eyes. This phenomenon is explained below.

Also Very Rare: Amber Eyes

True amber eyes are extremely rare-they are at least as rare as green eyes or perhaps even rarer. Most people have only seen a couple of amber-eyed people in their entire life.

Amber eyes are completely solid and have a strong yellowish, golden, or russet and coppery tint. They can also contain a small amount of gold-ish gray. Some sources say that this could be due to the increased presence of a pigment called lipochrome (also known as pheomelanin).

Amber eyes are often referred to as wolf eyes because of the strong golden and yellowish color with a copper tint similar to that seen in the eyes of wolves. Besides wolves, amber eye color can also be found in other animals, like dogs, domestic cats, owls, eagles, pigeons and fish.

The Difference Between Amber and Other Eye Colors

Amber eyes are different from hazel eyes because they do not contain hints of brown, green, or orange. While hazel eyes might change color or contain flecks of red or gold, amber eyes are always a solid gold hue.

In poor lighting, it's easy to mistake someone with amber eyes for someone with hazel eyes. In natural lighting, however, you'll see that hazel eyes tend to have two very distinct colors within the iris. They are often brown and green, and contain speckles and mixed hues.

Celebrities with Amber Eyes Include:

Nicole Richie

Nikki Reid

Evangeline Lilly

Darren Criss

Rochelle Aytes

Joey Kern

Black Eyes

Contrary to popular belief, true black eyes do not exist. Some people with a lot of melanin in their eyes might appear to have black eyes depending on the lighting conditions. This is not truly black, however, but simply a very dark brown.

The Science Behind Eye Color

Eye color is more complicated than it might seem, as it's determined by a wide range of factors and can depend to some extent on circumstance, especially lighting.
Eye color is determined by:

Amount and type of melanin in the colored part of your eye called the iris

The density and composition of the stroma, a thin tissue in your iris

Lighting conditions (especially for people with light-colored eyes)

Eye Color and Genetics

Genetics determines how much pigment is present in the iris of your eye. Up to 16 different genes play a role in determining eye color though there are two main genes that have the most influence.

How Melanin Affects Eye Color

Melanin is the most common pigment, and it is found in the eyes, hair, and skin. There are several types of melanin, including pheomelanin (which looks more red and yellow) and eumelanin (which tends to look brown and black).

You might have noticed that there is no blue or green pigment mentioned, which means there is no green or blue pigment ever present in the eye. There is only one kind of pigment, melanin, and its derivatives. So how can a pigment that only produces shades of brown create eyes that look green or blue?

While the first half of eye color has to do with what's already in your eye, the other half has to do with what goes into it: Light!

How Light Affects Eye Color

Your iris has two layers, a front and a back one, and in between those is a thin layer of tissue called the stroma, which has proteins in it (namely collagen). This will become important later.

Everyone has some kind of pigment in their iris, which usually includes a layer of melanin on the back of the iris. The only exception to this is for some people with albinism, who completely lack pigment in their iris.

So, technically speaking, everyone (cases of albinism excepted) has the same eye color. The difference comes with how it's perceived, which is due to the amount and type of melanin in the front layer of the iris and how light interacts with it.

Melanin Content and Eye Color

Melanin Presence on Front Layer of Iris

Melanin Presence on Back Layer of Iris

Biology Behind the Color: Eye by Eye

Blue Eyes

Blue-eyed people have no or little melanin on the front layer of the iris, so as light goes through the eye, it hits the back of the iris and then reflects out. As it goes through the stroma, the presence of proteins causes blue light to scatter, which makes the eye look blue.

This phenomenon (the scattering of light by particles much smaller than the wavelength of radiation) is called Rayleigh scattering, and it's the same reason the sky appears to be blue.

Gray Eyes

Unfortunately, we don't really know why people have gray eyes. There are, however, some theories on where gray eyes come from:

Gray-eyed people could have an even smaller amount of melanin in their eyes than blue-eyed people.

They could have a different composition of the stroma that causes the light to scatter differently.

Brown Eyes

Brown-eyed people have melanin in both parts of their irises, so the effect of the light-scattering cannot be seen. The eyes appear darker because more light is absorbed, and variations in color and shade of brown come from the amount of melanin present.

Green Eyes

The front iris layer of green-eyed individuals has only a small amounts of melanin which tends to be the red or yellowish pheomelanin. Since the melanin concentration is very low, the light scattering effect gives off a blue color, which mixes with the yellowish color of the pheomelanin, making the eye look green.

Amber Eyes

Amber eyes get their color from the increased presence of lipochrome (pheomelanin) in the iris.

Red or Violet Eyes

People with albinism are often considered to have violet or red eyes. However, the truth is a little more complicated. Albinism is a condition that causes people to have a lack of pigment in their hair, skin, and eyes. Since people with albinism lack pigment in their iris, light can bounce off the back of the eye and exit the eye.

The light usually reflects back red because of the blood vessels at the back of the retina. Eyes can look violet when this red color combines with the bluish color of the iris that results from a lack of melanin, and the aforementioned light-scattering effects.

In fact, the reason the eyes look red is the same reason you might have red-eye in a photograph, which results from light reflecting off the back of the eye and passing back out through the iris. In normal eyes and lighting conditions, light cannot exit the eye like this.

Why is the Sky Blue (Same Reason Eyes Are Blue)

Why Eye Color Appears to Change

Many people with blue, green, or hazel eyes commonly notice that their eyes change color depending on:

Lighting

What they're wearing

Makeup

Mood

This is because blue and green eyes get their color from the quality and quantity of light, not from pigment.

Thus, different lighting conditions will change the quality of the eye. Mood can change the size of the pupil, which might make the iris appear to be a different color. The quantity of melanin is not changing, but simply the way that the light is reflecting and scattering through the iris.

Can You Change Your Eye Color Naturally?

A baby's eye color can change in the first couple of years. After that, the eye color will most likely remain the same and the only way to change the appearance of your eye color is through makeup, clothing, lighting, and color contacts.

Putting honey in your eyes will not change your eye color permanently, though it could cause you to go blind. The reason some people see their eye color change from honey is due to the inflammation of the cornea as it tries to remove it from the eye.

Can I Find Out What My Child's Eye Color Will Be?

Unfortunately, it's impossible to predict with certainty what a child's eye color will be. In fact, scientists still don't have a way to accurately guess eye color since there are up to sixteen different genes that could be responsible for helping to determine eye color.

Though scientists used to believe that it was a relatively simple case of blue eyes being a recessive gene, and brown eyes being a dominant gene, it's now been found that eye color is determined by as many as 16 different genes. In fact, almost any combinations of parent-child eye color can occur. In general, darker colors tend to dominate lighter colors.

That said, we do know that the main genes found to determine eye color are OCA2 and HERC2. There is a fun tool that you can use to try to guess your future baby's eye color based on your eyes, your siblings' eyes, and your parents eyes.

Here's the eye-color calculator if you want to give it a try!

Other Color Variations

There are other variations that can occur in eye color aside from basic color. As you've learned, the iris is a complicated place! Its color comes from the combined effect of texture, pigmentation, fibrous tissue and blood vessels within the iris and stroma. Here are some other eye variations that can occur.

Heterochromia

This is where one eye is differently colored from another one, or one iris has different colors in it. Kate Bosworth is a good example of this. This results from uneven melanin content.

Limbal Ring

A limbal ring is a dark ring around the iris of an eye. Since they fade with age, they usually signify youth and are considered attractive.

Eye Color Is Not Black and White

If you look at your friends' eyes, you might find it hard to figure out exactly what color they are. Many eyes look like they have different colors toward the middle versus towards the edge, or have small variations around the iris.

This is especially true for people with lighter colored eyes. You might also notice flecks of color in them. Each of this is part of what makes each eye extremely unique. Irises (like fingerprints) are highly unique. Even genetically identical people, like twins, have different iris textures.

The more you look at eyes, the more you'll notice how unique each and every one is. So just remember that your eyes are special, no matter what color they are!

Sources

From Wikipedia: From The Tech Museum of Innovation: From Ask a Mathematician:

So, what is the rarest eye color in humans?

Unfortunately, there is no eye color that has been fully agreed upon as the rarest, though green-eyed and amber-eyed people are both extremely rare. In fact, the rarest eye color is different in different geographical locations. In some parts of the world, green eyes are rarer than amber eyes or vice versa.

Most people consider green to be the rarest eye color in the world, though many others consider amber to be even more unusual. Therefore, it's safe to say that either green or amber is the rarest color in the world.

However, If you look at the eye as a whole and not only the color given off by the iris, then violet eye color with little dispute is probably even rarer than green or amber eye colors.

Questions & Answers

Question:

Can scientists genetically engineer people to have different eye colors?

Answer:

This is possible in theory. It involves editing the eye color genes in a human egg and sperm cell, replacing one set of genes with another. The embryo can then develop into a person with a specifically chosen eye color. This kind of gene modification is called germline engineering. Researchers are already testing this on animals but not yet on humans - it is still illegal to design babies.

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Edmund is a biostatistician with over 10 years of experience in clinical research. He loves to study human-inherited traits. This is one of those questions that seems like it should have an easy answer when it really doesn't. In fact, there is some debate over what the rarest eye color actually is.

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If your eyes are dark brown then you won't really be able to see your eyes flow bigger or smaller.

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I took some notes, and answered questions throughout the video...

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I took some notes, and answered questions throughout the video...

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1.white of the eye

2.iris

3.pupil

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what would happen if only your cones worked and your rods can't function at all?

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what would happen if only your cones worked and your rods can't function at all?

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Does the shiny reflective substance on the back of nocturnal animal’s eyes actually produce light for the eye?

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I wonder what would happen if our iris is broken, would the pupil still change?

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What if our pupils didn't become smaller in very bright days?

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In the video, it said that dogs eyes glow green, but on my birthday we took a flash photo and my dog's eyes were red. Why is that?

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On OES, it was night time, I had a flashlight. I pointed the flashlight at the dog, and the eyes were green, I thought I saw it wrong, know I know that is a trait for the nocturnal animals.

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why do we need all these parts of an eye?

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I wondered what similarities and differences there are between a dog's eye and a human's eye. I created an experiment to see if the pupil works the same way. Here is one clip I took

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Why can’t I see if there’s absolutely no light?

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Why can’t I see if there’s absolutely no light?