What is the difference between reading and computer glasses?

There are two main differences between reading and computer glasses. The latter are designed to work at longer distances. They also usually contain material to reduce the glare from the screen. One of the alternatives to buy separate glasses and computer glasses is the purchase of specially designed bifocals. The prescribed glasses will have tailor -made lenses to suit specific shortcomings of the user's eyes. Generic glasses often simply contain magnifying lenses similar to those found in the magnifying glass. Although it may be suitable for many people, they will not be a suitable solution for everyone and could even cause more damage than good. This is easy to observe in practice. Most people read books with arms slightly, which is about 18 inches from the eyes. For visual and ergonomic reasons, the most common advice is that the computer screen should be on the length of the reader, which can be up to twice as far as the distance of book reading. This requires a dramatically different level of magnification andFocus point.

Another difference in computer glasses needs to face the effects of glare and reflection from the computer screen. This is a special problem with older CRT screens, but it is still a problem with modern flat screen monitors. This can be solved either by a lightweight tinge on the lenses or by a special opposite coating.

Computer glasses can also have to be specially designed to deal with the fact that the eye focuses in a different way with the screen. This is because compared to the printed page, the character contrast with the background on the MUCH screen is less well defined. The lower definition causes the eye to need continuous focus, even if it looks at the same character.

There are several solutions to these differences, in addition to simply buying separate reading and computer glasses. One is to have special bifocals, with one part of the lens designed to readPrinted pages and the second part adapted to use the computer screen. This is not an ideal situation for all users, because unlike reading page reading, the eye is more likely to be used when using the screen, which may require head movement when using bifocals. A more sophisticated solution is progressive added lenses, which rather than simply divide into two fixed pages of the lens, gradually increase the performance of movement from the top of the lens to the bottom. This makes it easier to set different types of visual material.