Word: Bifocals
Definition:
Bifocals are a type of eyeglasses that have two different areas for vision. One part of the lens helps you see things that are close to you (like reading), and the other part helps you see things that are far away (like looking at a distance).
Usage Instructions:
Bifocals are typically worn by people who have trouble seeing both near and far. When you wear bifocals, you usually look through the top part of the lens for distance and through the bottom part for reading.
Examples:
- "My grandmother wears bifocals so she can read her book and see the TV at the same time." - "After getting bifocals, I found it easier to read my phone and see the street while walking."
Advanced Usage:
Bifocals can be made in different styles and materials, and some people may prefer progressive lenses, which provide a gradual change in lens strength instead of a distinct line.
Word Variants:
- Bifocal (adjective): Referring to something that has two focal points. For example, "He uses bifocal lenses in his glasses." - Bifocality (noun): The quality of having two focal lengths.
Different Meaning:
While "bifocals" primarily refers to glasses, the prefix "bi-" means "two," and "focal" relates to focus. Therefore, it can be used in other contexts to describe anything with two points of focus.
Synonyms:
- Dual-focus glasses - Two-in-one lenses
Idioms and Phrasal Verbs:
There aren’t any specific idioms or phrasal verbs that relate directly to "bifocals." However, you might hear someone say, "I see things from a different perspective," which can relate to the idea of having multiple viewpoints, similar to how bifocals allow you to see both near and far.
In summary, bifocals are helpful for people who need to see both close and far clearly.