The world that only formerly-blind people can see
2013 04 19

By Esther Inglis-Arkell | io9



They once were blind but now they see. Which begs the question — what exactly do people see when they gain sight for the first time? Often, it’s terrifying.

What happens when people first really look at the world? Generally, we don’t know. They’re far too young to tell us what’s going on in their mind. By the time children are old enough to articulate what they see, they don’t remember what the world looked like in their first few weeks of life. There are special occasions, though, when full-grown adults can see for the first time. For the most part, they see a complete confusion. Often, that does a lot of emotional damage.

One of the earliest-known cases of regained sight is Virgil, the Roman poet. At age fifty, he had cataract surgery and regained his sight. Soon after, he wished he hadn’t. This is common to many blind people who regain their sight. Unlike infants, who are catered to, whose brains are primed for learning, and who have no option but to learn, blind people are asked to replace a familiar sensory system that reliably guides them through the world with an unfamiliar one that does nothing but confuse them. Sometimes the strain of assimilation is too much. Like many other patients, Virgil would shut his eyes and pretend he was still blind when the situation became overwhelming. He became depressed and died of pneumonia soon after his surgery. Although he had seen the world with his eyes, he retained his “mental blindness,” or what experts call “visual agnosia.”

For someone to see an object, the eye needs to pick it up, but the brain also needs to recognize it. This process takes both practice and a certain physical ability in the brain. Agnosia patients have generally suffered brain injuries and lost the ability to understand what they see – they see a rectangular object with a brown circle on top and a loop on one side, but don’t understand that they’re looking at a cup of coffee. There are only shapes. Those who have been blind most of their lives “wake up” with a certain amount of visual agnosia.



Spatial distance is often the primary problem they run into. One man saw people walking away from him as inexplicably shrinking. Another would practice spatial recognition by going out in a field and throwing his boot as far as he could. He’d hold out his hand to grab it, and if it wasn’t in reach, step forward before trying again.

Another area that many newly-sighted people find inexplicable is paintings and other visual representations. They can comprehend real objects, but not painted ones. When they do understand what the paintings are meant to represent, the shadows that are meant to define space and give shape just look like dark marks on the painting. Which, technically they are. It’s only a willful visual laziness on the part of the sighted that lets us see these paint blotches as shadows rather than shapes and colors.

Because we develop familiarity with faces and facial expressions at specific times in our lives – those who are deprived of human contact or changing facial expressions at that age often have trouble reading expressions for their entire lives – formerly blind people are often face-blind, or unable to decipher emotion from facial expression. Some have trouble differentiating between male and female faces.

[...]

Read the full article at: io9.com



Related Articles
App developer hopes to use Google Glass to help the blind see
Belgium Euthanizes Deaf Twins Going Blind
World’s first bionic eye gifts blind woman eyesight
Blind Mice Given Sight After Device Cracks Retinal Code
Google’s self-driving car takes blind man to Taco Bell
Blind People ’See’ Shapes, Navigate Using Echoes
Blinded Merseyside soldier ’sees’ with tongue device
TouchColor Helps Blind People to Draw
Synesthesia - Numberphile
Synesthesia May Explain Healers Claims of Seeing People’s ’Aura’
David Eagleman - Synesthesia, Unconscious Brain, and Tales from the Afterlives
"Altered States" 1980 - sensory deprivation, hallucinogens, experiments
Sensory-Friendly Film Screenings for Kids with Autism
Eye Contact May Disturb Autistic Kids’ Thinking


Latest News from our Front Page

The Aeon of Horus is Ending and the Elites are Nervous as their Icons are Dying
2014 04 18
I predict there is going to be a huge resurgence of interest in European indigenous spiritual traditions from Norse to Celtic/Gaelic to Slavic and so on. Millions of Europeans are going to realise that we are the victims of Christianity and New Age garbage. Their bastardised Kabbalah, the psychic force used by Crowley and the elites to cement his Aeon ...
Easter - Christian or Pagan?
2014 04 18
From: truthbeknown.com Contrary to popular belief, Easter does not represent the "historical" crucifixion and resurrection of Jesus Christ. In reality, the gospel tale reflects the annual "crossification" of the sun through the vernal equinox (Spring), at which time the sun is "resurrected," as the day begins to become longer than the night. Rather than being a "Christian" holiday, Easter celebrations date back ...
Man-Made Blood Might Be Used in Transfusions by 2016
2014 04 18
Researchers in the U.K. have created the first man-made red blood cells of high enough quality to be introduced into the human body The premise of the HBO show and book series True Blood revolves around a technological breakthrough: scientists figure out how to synthesize artificial human blood, which, as an ample new source of non-human food, allows vampires to "come ...
The Trials of the Cherokee Were Reflected In Their Skulls
2014 04 18
Researchers from North Carolina State University and the University of Tennessee have found that environmental stressors – from the Trail of Tears to the Civil War – led to significant changes in the shape of skulls in the eastern and western bands of the Cherokee people. The findings highlight the role of environmental factors in shaping our physical characteristics. ...
Our Fears May Be Shaped by Ancestral Trauma
2014 04 18
Last December, an unsettling Nature Neuroscience study found that mice who were taught to associate the smell of cherry blossoms with pain produced offspring who feared the smell of cherry blossoms, even if they had never been exposed to it before. We knew that the process was epigenetic—that it was not hard-wired in the permanent genetic structure of the mouse—but ...
More News »