hard lens

hard lens

noun
a contact lens of rigid plastic or silicon, exerting light pressure on the cornea of the eye, used for correcting various vision problems including astigmatism.
Compare soft lens.
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Based on the Random House Dictionary, © Random House, Inc. 2012.
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Hard lens is always a great word to know.
So is interrobang. Does it mean:
a gadget; dingus; thingumbob.
a printed punctuation mark (‽), available only in some typefaces, designed to combine the question mark (?) and the exclamation point (!), indicating a mixture of query and interjection, as after a rhetorical question.
Collins
World English Dictionary
hard lens
 
n
gas-permeable lens Compare soft lens a rigid plastic lens which floats on the layer of tears in front of the cornea, worn to correct defects of vision

Collins English Dictionary - Complete & Unabridged 10th Edition
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