When you close your eyes, you may be able to “see” colors, shapes, and light. Some of the images may also move or create a swirling effect. Such visual effects are sometimes called closed eye hallucinationsClosed-eye hallucinations and closed-eye visualizations (CEV) are hallucinations that occur when one's eyes are closed or when one is in a darkened room. They can be a form of phosphene.https://en.wikipedia.org › wiki › Closed-eye_hallucination
Most people see splashes of colors and flashes of light on a not-quite-jet-black background when their eyes are closed. It's a phenomenon called phosphene, and it boils down to this: Our visual system — eyes and brains — don't shut off when denied light.
Some light does go through your closed eyelids. So you might see a dark reddish colour because the lids have lots of blood vessels in them and this is the light taking on the colour of the blood it passes through. But often we see different colours and patterns when we close our eyes in the dark.
It is not uncommon. About 2% of people don't see images when they try to CREATE an image in their "mind's eye". However, these people DO SEE images, when they are asleep. Now, if you have problems with visualizing images you might feel that you have that condition.
Just because you close your eyes doesn't mean your eyes and brain shut down immediately. This extraordinary occurrence is called phosphene, and it's believed to appear because of light inside our eyes. This light is naturally produced, and our retina responds to it, and we see color.
Seeing the different sources of light, called light perception, is another form of blindness, alongside tunnel vision and many more. Though, one point to consider is the fact that individuals who were born blind cannot tell whether they see total black or not because, simply, they can't really tell.
A person with total blindness won't be able to see anything. But a person with low vision may be able to see not only light, but colors and shapes too. However, they may have trouble reading street signs, recognizing faces, or matching colors to each other. If you have low vision, your vision may be unclear or hazy.
Rods are responsible for vision in dim or dark light. They are located on the outer edges of the retina and help with peripheral (side) vision. Rods don't provide color vision, so night vision is only in black and white. Rods are much more sensitive to light — 500 to 1,000 times more sensitive — than cones are.
On the other hand, since yellow is the most visible color of all the colors, it is the first color that the human eye notices. Use it to get attention, such as a yellow sign with black text, or as an accent.
Color vision is controlled by cone cells in the retina. They can only be used in bright light. The cone cells are not stimulated by moonlight. As a result, humans can see in the moonlight but not distinguish between colors.
While blue eyes are more sensitive to light during the day, people with blue eyes tend to see better at night – unless there are bright lights. In that case, the lack of melanin makes them as sensitive to light at night as they are during the day.
A dreaming blind person experiences more sensations of sound, touch, taste, and smell than sighted people do. Blind people are also more likely to have certain types of dreams than sighted people. For example, blind people seem to experience more dreams about movement or travel.
Questioning the belief that dates back to philosopher John Locke that people born blind could never truly understand color, the team of cognitive neuroscientists demonstrated that congenitally blind and sighted individuals actually understand it quite similarly.
When you lose your sight, your brain gets less information from your eyes than it's used to. Your brain sometimes makes up for this by creating hallucinations.
Went Totally Blind: People who have lost their sight have different experiences. Some describe seeing complete darkness, like being in a cave. Some people see sparks or experience vivid visual hallucinations that may take the form of recognizable shapes, random shapes, and colors, or flashes of light.
Complete blindness (occasionally dubbed NLP, or “no light perception”) is incredibly rare. This happens when the connection between the eyes and brain is completely cut off. Either there is brain damage, the optic nerve has been severed, or the eyes have been removed.
Science Behind Blind People's White Eyes
A cataract is an accumulation of protein on the eye's lens. When this happens, light cannot pass through, which causes partial vision loss. Cataracts are not rare. In fact, it is the leading cause of blindness in the world and doesn't just affect the older generation.
While only 18 percent of people with significant visual impairments are actually totally blind, most can at least perceive light. In other words, although we cannot see colors, shapes or people, we can still tell the difference between light and dark.
Seventeen studies provided evidence that blind and sighted spontaneously produce the same pattern of facial expressions, even if some variations can be found, reflecting facial and body movements specific to blindness or differences in intensity and control of emotions in some specific contexts.
A braille watch is a portable timepiece used by the blind or visually impaired to tell time. It is used by touching the dial and noticing the embossments. Both analog and digital versions are available.
Deaf / hard of hearing people and their dreams
In a study titled Waking and Sleeping, researchers investigated people's dreams with hearing loss. After their research, they concluded that people with hearing impairments hear sounds in their dreams.
Overall, researchers and study participants agreed that black and white dreams were the norm, and rare cases of coloured dreams were dubbed 'Technicolor' dreams (Calef, 1954, Hall, 1951), highlighting their perceived artificiality. This tendency to report black and white dreams suddenly disappeared in the 1960's.
The answer is yes — blind people do dream — though their dreams are different from sighted individuals. In the absence of sight, the dreams of blind people tend to be full of touch, sound, smell, and taste, sensations which generally occur less often in the dreams of sighted people.
There are plenty of blue-eyed Asians. This probably happens when the traditional blue-eyed allele comes into a family from a (possibly very distant) European ancestor. Blue eyes then resurface in a child generations later if they inherit the allele from both parents.
The myth stops here
And while we have the least amount when we enter the world for the first time, remember that babies may be born with eyes of blue, brown, hazel, green, or some other color. It's simply a myth that all of us — or most of us, for that matter — are blue-eyed at birth.