According to federal law, practitioners cannot charge for ___________ lenses required for fitting but can charge for _____________ lenses.

In the context of federal law governing the sale of lenses, practitioners are prohibited from charging for standard lenses needed for fitting. This policy is designed to ensure that patients have access to necessary vision correction without facing additional financial barriers, particularly during the fitting process which is essential for proper vision care.

However, practitioners are allowed to charge for specialty lenses. These lenses are often customized or designed for specific purposes beyond routine vision correction, such as prescribing lenses for patients with unique visual requirements or conditions. Since specialty lenses typically involve additional customization, materials, and services, charging for them aligns with the regulatory framework which allows practitioners to appropriately compensate for their expertise and the resources involved in providing such specialized care.

The distinction made between standard and specialty lenses emphasizes the importance of accessing basic eye care while recognizing the value of additional services provided for more complex needs.