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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
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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?
Blue
Is it true the alcohol reduces the sensitivity of the cones in the eyes making it more difficult to distinguish red from green?
yes!
Why do you get rainbows?
Small droplets of water behave like tiny prisms in the sky. Sometimes the colors will reach our eyes after refracting and undergoing internal reflection. As can be seen in figure 4.3.2, droplets higher in the sky refract red to our eyes while green and blue go overhead. In drops lower in the sky, blue light is refracted and reflected to our eyes, but green and red light bend lower down, missing our eyes. The over-all effect is that we see a primary rainbow- a band in the sky with red at the top and blue at the bottom. Sometimes a less intense secondary rainbow can be seen above a primary one. Light reaches our eyes from a secondary rainbow after two internal reflections inside each rainbow. This has the effect of reversing the colors so the bottom band is red
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.
Why do jase's eyes turn red?
because he has blue eyes but when he gets mad his blue eyes turn to red. That what people with blue eyes have not other color eyes
How do people make red eyes ultimate dragon Yu-Gi-Oh card?
There is no such thing as a Red-Eyes Ultimate Dragon.
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.
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')
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
What type of colors eyes do people have?
Blue, brown, green, gray, amber, hazel. Albinos have red eyes.
What are the possible colors of people eyes?
Blue, brown, green, gray, hazel, amber. Albinos have red eyes.
