Evaluation Ratings

The Product Evaluations in this issue contain ratings charts. The following are explanations of the ratings used in those charts.

1. Little functionality; the device gives users little opportunity to function well.
2. Less than adequate functionality, with much room for improvement.
3. Good functionality but a definite need for improvement.
4. Very good functionality with minor improvements expected in the future.
5. Functionality equal to what a sighted person gets from an equivalent device.