Did You Know? – 3 Shocking Facts about Vision
“Our eyes do not see, but we see with our eyes” (Walls, 1963)
Our eyes do not see images. They see light.
It is the brain that processes it to form an image.
Think of the eye like a camera. It captures the light and sends the information to the brain via the optic nerve to process it and form an image.
Here’s briefly how it works:
The light first hits the cornea, and passes through to the lens. The lens focuses the light on the retina. On the retina, the light is converted into an electrical signal. The optic nerve then carries these signals to the brain for processing. There, in the visual cortex, the brain forms an image.
Recent breakthroughs allow for blind people to be able to see at elementary levels, all because of the fact that the power of vision lies in the brain, not in the eyes.
2. Reading Glasses are inevitable
At some point, every person will suffer from natural deterioration in near vision.
As we age, the lens inside the eye becomes less flexible. This is one reason why we have a harder time focusing on close-up objects.
This hardening of the lens often occurs around the age of 40.
At this time people begin having more difficulty reading a newspaper, a restaurant menu, text on a phone, etc. and turn to reading glasses for a fix.
Some things you might notice in your vision as you age:
- Need for stronger light when reading.
- More sensitive to glare.
- Blurred close-up vision.
- Weaker contrast detection (text against background).
This deficiency in near vision, dubbed presbyopia, is commonly addressed with traditional solutions like magnification devices, such as reading or multifocal glasses.
GlassesOff can delay this need for reading glasses by an average of 8.6 years.
3. Vision can improve with brain training
As we learned above, vision occurs in the brain.
Therefore, you have the ability to improve your vision by improving the functioning of your brain.
Human vision is limited by two main factors:
(i) the quality of an image captured by the eyes;
(ii) the capability of the brain to process an image as it is captured by the eyes.
Therefore, people can improve their vision by bettering the quality of images captured by their eye (e.g., becoming dependent on glasses or going through invasive corrective eye surgery), or by enhancing their brain’s image processing abilities.
Eye exercises that train the brain to boost its image processing capabilities can improve near vision sharpness and reading abilities.
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