10 fascinating facts about eyes you probably did not know
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The eyes are among the most complex and remarkable organs in the human body. Although we use them constantly, they still hold facts that surprise most people. At Clínica Castellote, specialists in ophthalmology in Castellón, we share some fascinating facts about vision that will help you see your eyesight in a new light.
- The brain is what really “sees”
Although the eyes capture light, the brain interprets the images. Much of the brain's activity is related to visual processing.
- We blink less in front of screens
When using a mobile phone or computer, we blink up to 60% less, encouraging dry eye and eye strain, one of the most common reasons for consultations at Clínica Castellote.
- Each eye sees a different image
Each eye captures an image from a different angle, and the brain combines them to create three-dimensional vision, allowing us to judge distance and depth.
- The eyes can distinguish millions of colours
The human eye can distinguish around 10 million colours thanks to the retinal cones, cells specialised in colour vision.
- The cornea has no blood vessels
The cornea is the only tissue in the body that receives no direct blood supply. It gets its oxygen from the air and tears, making it unique.
- The eye is faster than any camera
The human visual system can process images in milliseconds, much faster than any digital camera can capture them.
- Vision changes with age
From the age of 40, presbyopia, difficulty focusing close up, commonly develops. At Clínica Castellote it is one of the most common reasons for adult consultations.
- We cry because of emotions, not just irritation
Humans are the only beings that cry because of emotions. Emotional tears have a different chemical composition from reflex tears.
- The eyes reveal general health problems
Many systemic diseases, such as diabetes or high blood pressure, can be detected during a comprehensive eye examination, which is why regular check-ups are important.
- We do not all see the same colour in the same way
Colour perception varies slightly from person to person, even among people with normal vision, because of differences in retinal cones.
Conclusion
The eyes are fascinating organs that allow us to connect with the world in a unique way. Understanding how they work and caring for them properly is key to maintaining good visual quality throughout life.
If you would like your eye health checked or have any questions about your vision, at Clínica Castellote, a leading centre for ophthalmology in Castellón, we will be happy to help.