My ergomonic keyboard has been so helpful in reducing muscle strain.
I usually just use the regular cheap ones at work. 
I used to as well, but the v shape of this keyboard is great.
Does it help with arthritis?
typical straight keyboard.
An "adjustable split keyboard" has the keyboard split into several independent pieces, so the angle between them can be easily changed.
Types Contoured keyboard.
A further development of the split concept are contoured keyboards like the 1977 Maltron or the newer Kinesis Advantage line, which place the keys into two depressions set approximately at shoulder width, with function keys set between the key groups for use with the thumbs. In this configuration, very little movement of arms and wrists is required.
Types Handheld keyboards
the aid of strong spectacles, but reading, in particular, was a great strain. In 1939 his ability to read became increasingly degraded, and he sought the help of Margaret Corbett, who was a teacher of the Bates method. He found this immensely helpful, and wrote “At the present time, my vision, though very far from normal, is about twice as good as it used to be when I wore spectacles, and before I had learned the art of seeing”.
The book is not an