Seniors often find it hard to learn to manipulate the devices. Students find it difficult to look at the blackboard, then watch the teacher, and then look at their desk. Computer operators can't easily look at the monitor, then switch to the keyboard, a printout or another worker. It allows the visually impaired to perform visual activities much more efficiently and with greater comfort than ever before. Computer controlled infrared electro-optics measure the focusing distance many times per second while another computer controls a miniature motor that moves the focusing lens to the proper position.
Special software helps to insure that the focus is prompt, accurate, and stable.
Pilot clinical studies have been completed at four independent low vision centers with funding from the National Eye Institute and the Ontario Ministry of Health. No one wants to look unusual. Special effort has been made to make it as lightweight and as comfortable to wear as possible. Managing the needs of the visually impaired is very challenging. No low vision device can be helpful to everyone.