Identify progressive addition lenses (PAL).

Identification should include

• identifying basic PAL characteristics
• explaining the advantages and disadvantages of PAL
• differentiating between basic PAL and near variable focus lenses.

Process/Skill Questions:

• What makes a PAL different from other types of multi-focals?
• When would a patient benefit from near variable focus lenses?
• How can you determine the manufacturer of a PAL?