A type of eyeglasses that have two different optical powers for seeing at different distances.

A group or category of items, people, or characteristics that share a common trait.

समान गुण वाले वस्तुओं, लोगों या विशेषताओं का समूह

English Usage: "The bifocal group of students included both those who excelled in science and those who struggled."

Hindi Usage: "छात्रों का bifocal समूह उन लोगों को शामिल करता था जो विज्ञान में उत्कृष्ट थे और जो संघर्ष कर रहे थे।"