What is another word for hard lens?
Pronunciation: [hˈɑːd lˈɛnz] (IPA) 
The word "hard lens" refers to a type of contact lens that is made of rigid materials, such as gas permeable or PMMA material. However, there are a few synonyms for this term that can be used in specific contexts. For example, some people refer to these lenses as "rigid lenses" or "rigid gas permeable lenses" (RGPs). Other synonyms include "gas permeable lenses," "corneal lenses," and "oxygen-permeable lenses." These synonyms are often used interchangeably with "hard lenses" but may be preferred in certain situations where specific materials or characteristics of the lenses are being discussed. Overall, these terms all refer to a similar type of contact lens that is durable and long-lasting.
