trifocal in English
adjective
1
(of a pair of glasses) having lenses with three parts with different focal lengths.
One analysis reports that neck pain experienced by middle-aged patients often coincides with their first prescription for bifocal or trifocal glasses.
noun
1
a pair of glasses with trifocal lenses.
Scopes also help mature shooters continue in the sport longer, he said, because finding iron sights through bifocals and trifocals can be challenging.
Use "trifocal" in a sentence
Below are sample sentences containing the word "trifocal" from the English Dictionary. We can refer to these sentence patterns for sentences in case of finding sample sentences with the word "trifocal", or refer to the context using the word "trifocal" in the English Dictionary.
1. Bifocal, trifocal and quadrifocal tensors are used to reduce the calculation time.