1. having three focal points or areas of focus
Usage: optics

1. eyeglasses with lenses that have three different focal lengths for seeing at different distances

Examples

• The optometrist recommended trifocal lenses for her complex vision needs.
• His new trifocals allow him to see clearly at near, intermediate, and far distances.
• Trifocal glasses have three distinct zones for different viewing distances.
• She struggled to adjust to her first pair of trifocals.
• The trifocal design includes sections for reading, computer work, and distance vision.
• Many people find trifocals more convenient than switching between multiple pairs of glasses.