Welcome to Anagrammer Crossword Genius! Keep reading below to see if trifocal is an answer to any crossword puzzle or word game (Scrabble, Words With Friends etc). Scroll down to see all the info we have compiled on trifocal.
trifocal
Searching in Crosswords ...
The answer TRIFOCAL has 6 possible clue(s) in existing crosswords.
Searching in Word Games ...
The word TRIFOCAL is VALID in some board games. Check TRIFOCAL in word games in Scrabble, Words With Friends, see scores, anagrams etc.
Searching in Dictionaries ...
Definitions of trifocal in various dictionaries:
Having three focal lengths.
Having one section that corrects for distant vision, a second section that corrects for medium vision, and a third that corrects for near vision, as an eyeglass lens.
A lens having three focal lengths.
Word Research / Anagrams and more ...
Keep reading for additional results and analysis below.
| Possible Crossword Clues |
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| Lens type |
| Progressive predecessor, in lenses |
| Like some multiuse eyeglass lenses |
| more than double-duty lens |
| Lenses |
| Trifocal description |
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Trifocals are eyeglasses with lenses that have three regions which correct for distance, intermediate (arm's length), and near vision. John Isaac Hawkins developed the trifocal lens in 1827.Trifocals are mostly used by people with advanced presbyopia who have been prescribed 2 diopters or more of reading addition. The intermediate addition is normally half the reading addition. So, for someone with a distance prescription of 4 diopters and a reading addition of +3, the reading portion of their trifocals would have a net power of 1, and the intermediate segment would be 2.5 diopters. * Trifocal lenses are made in similar styles to bifocals, but with an additional segment for intermediate vision above the reading section. A common style is the 7×28 flat-top or D-shaped segment, 28 mm wide, with a 7 mm high intermediate segment. Larger intermediate segments are available, and are particularly useful for people who spend a lot of time using computers. * Trifocals are becoming rarer as mo |
| Related Answers |
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| angle |
| OCULARS |
| progressive |
| wide |