If a salesperson makes this statement, you might want to question his or her knowledge. OSHA is not an approval agency. Under no circumstances will OSHA approve a product. What you must always remember is that just because a product is sold in the United States, it doesn't mean that it can be used in every situation. Some products are manufactured for residential use only.
Employees can even find eye protection at the local hardware store or home center.
They can purchase the cheapest pair of goggles and head to work. If the label doesn't indicate that the goggles are rated for commercial use or ANSI Z-87.1, then they shouldn't be used. Let's say you purchased safety glasses with side shields for use when using hazardous chemicals. Even though the glasses might have the proper labeling, they will not be rated for use with liquids. You will need some type of acceptable goggles for that use.