"We depend on our eyes more than any other sense, however many of us take this precious gift for granted. Without them, we could not experience a beautiful sunset, see the faces of our loved ones, or view the natural marvels of the world. We rely on our eyesight for so much, but most people have only a vague idea of how our eyes work. There are actually many different parts of the eye working together to form a unique self-sustaining system. Though smaller than a ping-pong ball, the eye allows us to see, while cleaning, moisturizing and disinfecting itself at the same time."
How Do Glasses Help Us See?
"Today, glasses help millions of people with poor vision be able to see clearly. But how? Andrew Bastawrous and Clare Gilbert help unravel the answer by explaining refraction — the ability of a transparent medium, like glass, water, or the eye, to change the direction of light passing through it."
"What Are Those Floaty Things In your Eye?"
"Eye floaters can be clumpy or stringy; light or dark. They are caused by clumps or specks of undissolved vitreous gel material floating in the dissolved gel-like fluid (vitreous) in the back of the eye, which cast shadows on the retina when light enters the eye."