Desk. Monday , February 12th , 2018 - 16:45:25 PM
Desk top computer use is usually more demanding beginning in the late forties or early fifties. Viewing through the distance portion of your eyeglasses to see just beyond the reading range to the computer screen puts a strain on your eyes by overworking the eye’s accommodative/focusing ability. The amount of lens power necessary to relieve the eyes from the stress is about half the amount of power necessary for you to read with.
Your bifocal add power allows your eyes to focus on reading with less accommodative (eye muscle and lens focusing ability) effort and greater comfort for long periods of time more efficiently. A dedicated pair of computer glasses or a computer clip-on will do the same thing for desk top viewing. Otherwise, looking at a PC monitor through the distant portion of your bifocal or progressive lenses is like walking versus riding the bicycle to work example; you my be able to do it but you eyes will get tired sooner. It has always been my belief that when your eyes get tired, so does your body. You now have a choice to beat sleepiness while working at the computer, and re-energize your eyes with better vision and with less physical stress on your posture.
Sitting for long hours in an awkward or unnatural position can lead to neck and back pain which in turn can lead to repetitive strain injury as well as Carpal tunnel syndrome. A good ergonomic desk allows the user to adjust the height and angle of the keyboard shelf and monitor shelf for a more natural posture. It should also allow for proper clearance for the user’s legs as well as allow for natural placement of computer accessories to avoid putting the user in an uncomfortable position when attempting to work at their desk and use a computer.
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