I Think its because the fflash can reflect of the persons eye and back into the lense..? Not 100% sure though, hope this helps
That's correct!
Their eyes appear to be red sometimes.
Dogs' eyes appear red in light because of a layer of cells called the tapetum lucidum located behind their retinas. This layer reflects light, causing the red-eye effect in photographs and when light shines directly into their eyes.
because dogs see differently than humans
Because dogs see differently then humans. Might show up in pictures you take.
Red eye reduction is a feature in cameras that helps reduce the appearance of red eyes in photographs taken with a flash. It works by emitting a pre-flash of light before the main flash, causing the subject's pupils to contract and reducing the reflection of light from the retina, which is what causes red eye. This helps improve the quality of photographs by making the subjects' eyes appear more natural and less distorted.
To make your eyes appear red in photos, you can try staring at a bright light before taking the picture. This can cause the blood vessels in your eyes to dilate, making them appear red.
Red eyes appear in photographs due to the reflection of light from the camera's flash off the blood vessels in the retina. When the flash fires, it can illuminate the eyes before the pupils have a chance to constrict in response, resulting in the red appearance. This effect is more pronounced in low-light conditions where the pupils are dilated, allowing more light to enter. Using red-eye reduction features or adjusting lighting can help minimize this effect in photos.
alge is sometimes red or green the red is more comen in subzero temp.
There is no way to make Red appear a second time. Climb mount silver. Sometimes he's there sometimes he's not.
Red Eyes Shadows Lighting/Flash Creepy Smile
Dogs' eyes can appear red in light due to a layer of cells called the tapetum lucidum, which reflects light back through the retina. This reflection can make the eyes appear red or glowing in certain lighting conditions.
Well, technically the only way It can appear red is if there are sources of (generally light) that are red in color. You said sometimes so If you've been seeing red water at around sunrise/set its because of the sun. At the moment I cant currently think of any reason why water would sometimes appear red...