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The "red " in the eyes of some people is from a camera with a FLASH.
In the flash the person is in a dark setting so this makes their iris dilate letting in light from the flash.
In the back of the human eye is a blood rich retina that turns focused light that hits it and turns the light into electrical signals that travels through optic nerve to the brain. The brain then turns these electrical signals into a arrangement (digital) that our brain understands as a image.
I digress; the "red" eyes in the photo is due to the flash hitting the retina and is reflected back to the lens of the camera
What else can I help you with?
Why do some people get red eye in pictures and others don't?
it depends on the camera
Why are red lights red?
Meaning it's STOP not GO in one case... In the other, red lights are red because... The light passes through a red filter which colors the light red. It comes to our eyes as red, and we see it as red.
If an object absorbs red and green light outside in the daylight what color will it look to your eyes?
If the object absorbs red and green light, it will mainly reflect or transmit the blue light, so it will appear blue to your eyes. This is because the color we perceive is based on the light that is not absorbed by the object, but rather reflected or transmitted back to our eyes.
Is it true the alcohol reduces the sensitivity of the cones in the eyes making it more difficult to distinguish red from green?
yes!
What color light is the hardest to see at night?
Red light is the hardest to see at night because our eyes are less sensitive to red wavelengths in low light conditions. This is why emergency vehicles often use red lights for discretion.
Why do dogs' eyes glow red in pictures?
Dogs' eyes glow red in pictures because of a layer of cells called the tapetum lucidum located behind their retinas. This layer reflects light, causing the red glow when a camera flash hits their eyes.
How do people have red eyes?
albino peole have red eyes because they lack hectomelatin
What visual mechanism might explain red eye?
Often, people who take pictures will notice that their photos come out with people having bright red eyes. This is caused by the flash of a camera actually seeing the light reflecting off a person's retina.
How do people make red eyes ultimate dragon Yu-Gi-Oh card?
There is no such thing as a Red-Eyes Ultimate Dragon.
Why are my dog's eyes red in pictures?
Red eyes in photographs of dogs are often caused by the reflection of light off the blood vessels in the back of their eyes. This is a common occurrence in animals and humans due to the way light interacts with the eyes. It is typically not a cause for concern unless accompanied by other symptoms such as discharge or squinting.
Why do dogs appear to have glowing blue eyes in flash photographs and not red eyes like humans?
Because dogs see differently then humans. Might show up in pictures you take.
All the versions of red eyes b dragon?
Red Eyes B. Dragon Red Eyes Metal Dragon Red Eyes Darkness Dragon Red Eyes B. Chick Red Eyes Zombie Dragon Red Eyes Darkness Metal Dragon Red Eyes Wyvern there may be more.
Why do some people get red eye in pictures and others don't?
it depends on the camera
What color eyes can people have?
Brown, blue, green, gray, amber, hazel. Albinos have red eyes.
Do red tree frogs have 3 eyes?
no, they only have 2 eyes like all animals and people
How many different Red-Eyes monsters are there in YuGiOh?
There are eight different "Red-Eyes" Monsters. Here is a list of them:"Red-Eyes B. Dragon""Red-Eyes Black Metal Dragon""Red-Eyes Darkness Dragon""Red-Eyes Darkness Metal Dragon""Red-Eyes B. Chick""Red-Eyes Wvyern""Red-Eyes Zombie Dragon""B. Skull Dragon" (Summoned Skull & 'Red-Eyes')
What percentage of redheads have blue eyes?
One out of every six people in the United States has blue eyes.
