Final answer:
The associate should inform the customer about the scratch-resistant qualities of quality sunglasses, suggest polycarbonate lenses for better resistance.
Step-by-step explanation:
If a customer is concerned about scratching the lenses of a $100 pair of sunglasses, the associate should reassure the customer about the durability and quality of the lenses. Most quality sunglasses come with lenses that have a scratch-resistant coating.
However, if the customer is very concerned, the associate can suggest looking for glasses with polycarbonate lenses, which are more impact-resistant and have greater scratch resistance than standard plastic lenses. It's also beneficial to inform the customer about proper care techniques.
This will help to maintain the longevity and performance of the sunglasses. For customers who are particularly active or concerned about damage, the associate might recommend sunglasses that come with a warranty that covers lens scratches.