Sun gazing—or, looking directly at the sun—can improve your health and well-being.
Staring at the sun for even a short time without wearing the right eye protection can damage your retina permanently and even cause blindness.
Commonly kept as pets, the expansion of their pupils can make them look very adorable
Cats
Dry eye
Your eyes don’t make enough tears to stay wet, or when your tears don’t work correctly.
American author, disability rights advocate, political activist and lecturer. She lost her sight and her hearing after a bout of illness when she was 19 months old.
Hellen Keller
Retinitis pigmentosa
Slow lost of sight with age as the rods and cones of the retina dies.
You can lose your contact lenses behind your eye forever.
Your eyes are in a socket, they cannot be lost.
They can move their eye independently
Chameleons
It can make your vision blurry or distorted. It happens when your cornea or lens has a different shape than normal
Astigmatism
Inventor of a tactile writing system with raised dots
Stargardt disease
Vision loss that can slowly decline to the level of legal blindness as the macula dies off.
Only boys can be color blind.
Women can develop or inherit color blindness, but men are at much higher risk. An estimated 1 in 10 males have some form of color deficiency. Most color blind individuals are born with partial or complete lack of cones in the retina, which help distinguish the colors red, green and blue.
They have the biggest eyes of all animals found on land.
Ostrich
It develops when there’s a breakdown in how the brain and the eye work together, and the brain can’t recognize the sight from 1 eye. Over time, the brain relies more and more on the other, stronger eye, while vision in the weaker eye gets worse.
Amblyopia (also called lazy eye)
Inventor of bifocals
Benjamin Franklin
Retinoblastoma
Retinal cells undergo changes that spark uncontrolled cell growth, causing a tumor to form in one or both eyes. The cancer can spread to other parts of the eye and body. Usually happens to children
Babies are born with their eyes fully-grown.
Generally, babies are born with eyes that are approximately two-thirds of their full adult size. Eyes continue to grow after birth, usually during two phases: the first few years of life and puberty
They have 16 types of color receptors, including ultraviolet and polarized light
Mantis Shrimp
It can cause vision loss and blindness in people who have diabetes. It affects blood vessels in the retina
Diabetic retinopathy
Inventor of first successful contact lenses
Dr. Adolf Fick
Cystinosis
Multiple organs — including the eyes, brain, kidneys, liver and pancreas — are affected when crystal deposits containing the amino acid cystine accumulate.
The only eye care providers worldwide who are licensed to practice both medicine and surgery
Ophthalmologists
Each of its eyes is split into two parts– the top half looks above the water, while the bottom half sees below the surface
Four-eyed Fish/Anableps
It happens when your retina is pulled away from its normal position at the back of your eye.
Retinal detachement
A 16th-century German physician considered by some to be the father of modern ophthalmology for his comprehensive writings on eye diseases
George Bartisch
Batten disease
(juvenile neuronal ceroid lipofuscinosis)
A genetic defect that causes fatty substances to build up in cells of the brain, nervous system and retina. Vision loss occurs early, usually between ages five and 10