Left-handed keyboards position the numeric keypad and directional arrow keys to the left of the alphabetic keypad, benefiting one-handed typists and reducing discomfort for two-handed typists. Specially designed keyboards are available for people with disabilities, including those with motor or visual impairments. These keyboards can also help reduce the risk of repetitive strain injury.
A left-handed keyboard generally allows left-handed users to follow their natural strengths by positioning the numeric keypad and directional arrow keys to the left of the alphabetic keypad. Some left-handed keyboards have the alpha keys angled similar to an ergonomic keyboard. Another version of a left-handed keyboard has a mirrored number pad, which is arranged the other way around to a standard number pad.
Even those who aren’t left-handed can benefit from a left-handed keyboard. The left-handed keyboard can also be used by one-handed typists. Some two-handed typists find that the left-handed keyboard prevents or relieves hand, wrist, or arm discomfort.
Those who are right-handed sometimes find that using a left-handed keyboard moves the mouse position more to the center of the work area. By bringing the keyboard closer to the mouse, you can reduce the pain or discomfort caused by reaching for the mouse. The left-handed keyboard also distributes the workload more evenly between both hands. With a standard keyboard, left-handed users find that they have to use their right hand for the arrow keys or numeric keypad, or otherwise make for an awkward grip.
Many special keyboards are available for people with disabilities such as physical or visual impairments. Some are compact one-handed devices that use a method called chording, which involves pressing a few keys simultaneously.
Other specially designed keyboards eliminate the need to press more than one key at a time. These keyboards, often used by people with severe motor disabilities, have larger individual keys and overall measurements. They also require only a minimal amount of pressure to activate the keys. For those who are hard of hearing, a light flashes to indicate acceptance of input. For those who are visually impaired, an audible click serves the same purpose.
Many specially designed keyboards, such as a left-handed keyboard or an ergonomic keyboard, help reduce the risk of repetitive strain injury (RSI). RSI is sometimes caused by repetitive computer activity. Adjustable keyboards are available that are divided into two alphanumeric sections that can be adjusted both horizontally and vertically. Each user can adjust the keyboard to his natural hand posture with this type of keyboard, thus reducing the risk of RSI. Ergonomic mouse, palm rests, and numpad and mouse platforms can also be helpful.
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