This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

• Lexulous
• Wordscraper
• Wordosaur

n. Spectacles with corrective lenses that have three different powers per eye.

"Got exam, two pairs of graduated trifocals and frames for a little over $2000 pesos recently. johanson"

bifocals    trifocal