The cornea is the outer layer of the eye that helps focus light onto the retina. When the cornea is not perfectly shaped -- a common occurrence -- the images projected onto the retina will be blurry or out of focus. These irregularities on the cornea are known as refractive errors and distort the vision of the eye. Often, these refractive errors cannot be corrected by glasses or contact lenses, and a surgical operation is required. For many people, LASIK surgery is the perfect solution.
Whether it’s headaches, soreness in your eyes, or blurred vision, optometrists use an umbrella term for any discomfort that may be caused by staring at a digital screen: Computer Vision Syndrome (CVS). Sometimes called Digital Eye Strain, CVS can result from spending too much time on your computer, tablet, or cellular phone. But many of our activities require us to focus on a computer monitor for extended periods, whether we’re at work, school, or playing games.
The cornea is the transparent front outer layer of the eye that covers the pupil and the iris. The cornea accounts for approximately two thirds of the eye’s total optical power, but unlike the adjustable curvature of the eye’s lens, the amplification provided by the cornea is fixed, or constant. The cornea has multiple layers, and typically holds a uniform shape. But various conditions can affect the shape of your corneas and, consequently, your vision.
Your plane has finally touched down in Honolulu International Airport and your vacation will officially start the moment you set foot on solid ground. As you exit the aircraft, you reach into your pocket to grab your sunglasses, but you’re stricken with the sudden realization that you left them in the cab this morning. “Every time,” you think to yourself as you gather your luggage. But before you consider spending five whole American dollars on a pair of cheap plastic specs, it’s important to recognize that low-quality sunglasses may, in fact, be more detrimental to the health of your eyes than not wearing any sunglasses at all!
You may have heard carrots are the best food for maintaining healthy eyesight and improving your ability to see in the dark. Although there is a ring of truth to this claim, its origins come from a rumor started during the WWII era. British Intelligence used radar to detect incoming German planes at night, and supposedly, in order to protect the secrecy of their technology they “leaked” information that they fed their anti-aircraft gunmen a surplus of carrots to improve their night vision.
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