Battling Vision

Is buying eyeglasses online a good idea? You can buy everything else on the Internet, even contact lenses, so why not buy eyeglasses online too? Is doing so more convenient, less expensive or more risky? Let’s take a look.

Shopping online is generally more convenient if you know what you’re looking for and you shop at reputable sites. It’s convenient for those who are busy and those who live in remote or rural areas. All you need is a computer, an Internet connection, a shipping address and a credit card and you can buy practically anything online, even eyeglasses.

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What is Color Blindness?

Color blindness is a condition in which a person cannot distinguish color properly. There are several variations of color blindness and each one relates back to a problem with the functionality of the cells inside the retina that deal with processing light sensitivity. The rod cells are activated by low light while the cone cells are activated by daylight.

The pigments inside each of the 3 cone cells react and respond differently as each absorbs light. Each pigment processes a different wavelength: short, medium and long. In a normal eye, this interaction and overlap between the cones, pigments and the amount of light each absorbs as the eye processes various images is what makes it possible to create the wide spectrum of color that most individuals are able to view.

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