Understand how eyeglasses can help you see clearly and efficiently, it is first necessary to understand how we see. By understanding the process involved we can then move on to how glasses help with vision.
The eyeball does not actually produce the image that we "see", it is the brain that does that. Our eyes simply collect the light that makes up the image and focusses it on the retina.
If the light is focused in the wrong place and misses the retina, our vision is blurry. If the light is focused right on the retina then we see clearly and the image is sharp.
Some people are shortsighted, this means that things in the distance, like signs in shop windows, are blurry. Other people have the opposite problem and have problems with seeing things really close up. Items like mobile phones are blurred. This is because the light is not focused on the retina.
When people have either of these conditions, they are prescribed special glasses that change the focus so that the light is focused directly onto the retina.
Both eyes have to be checked because one eye might need different adjustments to the other eye. Check out the National Eye Institute, for more information on how the eyes work.
As people age a part of the eye called the lens can often become stiff and fails to work as it should do.
Glasses can correct vision by helping the lens to focus more exactly on the Retina. They cannot strengthen or fix problems with your eyes. They will not weaken your eyes either. As you age, your eyes will keep declining even though you wear your glasses, and getting new prescriptions regularly is important.
We have all seen the stands in regular stores and gas stations, with reading glasses These glasses are simply magnification lenses. Using them will not damage your eyes but wearing them may cause eye strain, headaches, sore eyes, and dry or watery eyes.
These lenses do not allow for the differences between both eyes or provide correction for other vision problems. They are purely for magnification purposes.
Apart from the fashion element, sunglasses have health benefits for your eyes, according to Elliot Levine MD. Dr. Levine says that the most significant advantage of sunglasses is that they offer protection from the harmful ultraviolet light that can damage various parts of the eye including the retina.
Dr. Levine also goes on to say that wearing sunglasses all year round. However, much sunlight there is, UV light is always present, especially near water or snow. Too much UV exposure can cause a burn on the cornea.
Sunglasses will also assist in the protection of your eyelids from aging. The eyelid skin is the thinnest skin on the body and particularly susceptible to damage from sunlight.