The larger the magnifier, usually the less powerful. Generally, the more powerful a magnifier, the smaller the area viewed. With less power, the r eader can still see the whole word. There is a career specialty in vision-related rehabilitation of Low Vision Clinician. These professionals work with optometrists and ophthalmologists to provide support to persons learning to use low vision aids.
Laws vary from state to state and usually require extensive training and some restrictions.
Train ing is in the areas of low vision and driver's education. This practice is sometimes referred to as Bioptic Driving. Bioptics are long distance aids that attach to the glasses and allow an driver to see further down the road. Not all low vision drivers require bioptics, but special techniques are essential to safe driving. Training can be expensive and not all persons are good candidates.