There is some confusion over what computer glasses actually are. Basically, computer glasses are simply prescription eyeglasses that are made with a focal distance for the computer. In the language of optician-speak, this is known as the "mid-range," the range between regular reading distance and long vision distance.
Computer glasses are designed to optimize the mid-distance to the computer screen. Computer glasses differ from regular eyeglasses or reading glasses, because computer screens are usually positioned 20" - 26" from the user's eyes. You simply cannot use glasses that have prescriptions for either distance or close up vision needs. You need computer glasses that are made with large intermediate distance zone lenses. Peruse the Eyeglasses.com selection of computer eyeglass frames to find the frames you want.
Computer glasses are now becoming available with more complicated, occupational bifocal lenses (two viewing areas with a visible line between them), trifocal lenses, and progressive lenses (a bifocal without the visible line). These new computer glasses lenses tend to have a larger intermediate distance zone area suitable for viewing content on the computer screen. Before going to an eye doctor for a prescription for computer glasses, sit at your computer and have someone carefully measure the distance between your eyes and the computer screen. Your eye doctor can then determine the glasses' prescription with a focal distance appropriate for computer work. The simplest computer glasses (one viewing area in the lenses), have single vision lenses made specifically with a lens power prescribed to prevent computer eyestrain. These computer glasses would not be suitable for driving or other significant distance vision tasks nor for close up reading needs. Once you have your prescription and your PD distance, which you should ask for during your eye exam, you are ready to select computer glasses frames at Eyeglasses.com.
The research and development of computer eyeglasses lenses has evolved to where lens coatings and tints are becoming more common. Many opticians believe the lenses of computer glasses should include an anti-reflective coating for maximum viewing comfort. Anti-glare or anti-reflective coating has been around for awhile and is recommend for both night driving and reading, as well as for computer glasses. Another coating that is recommended for computer glasses is protection from UVa, UVb, & HEV. The UV-protective treatments for eyeglass lenses block specific rays from damaging the wearer's eyes. Be aware that all eyeglass lenses from Eyeglasses.com use only Essilor made lenses that which already have 100 percent UV protection built-in, so an extra lens treatment is not required. You may also find some computer glasses that are tinted an unmistakable yellow tint. This memorably colored tint increases the contrast on the screen and filters out the uncomfortable, harsh light spectrums allowing eye muscles to be more relaxed while working at the computer.
For those of you who do experience tired eyes at the end of the day, computer eyeglasses may be the solution. Eyeglasses.com is here to help you purchase computer eyeglasses at a lower cost than you will find at your local retail eye store. Before spending money for special computer glasses, optimize your eye health by setting up an ergonomic computer workstation. It doesn't matter if you need to wear computer eyeglasses or not, but by taking a break every half hour to give your eyes a chance to rest. In addition, practicing what is called the "20-20-20" rule where you spend 20 seconds looking at objects 20 feet away for every 20 minutes of computer work should be able to optimize your eye health.