Definition

1. Noun:
   • Far-sighted glasses; Hyperopia/ Hypermetropia glasses: Glasses with convex lenses used to correct the refractive error of farsightedness (hyperopia/hypermetropia), allowing the wearer to see nearby objects clearly.

Usage Examples

• Noun:
  • Ông ấy phải đeo kính viễn để đọc sách. (He has to wear far-sighted glasses to read books.)
  • Tật viễn thị thường được điều chỉnh bằng kính viễn. (Farsightedness is usually corrected with hyperopia glasses.)

Advanced Usage

• The term is often used in contrast with "kính cận" (near-sighted/myopia glasses). A common phrase is "kính viễn kính cận" to refer to prescription glasses in general for refractive errors.
• In a medical or optical context, it can be part of the phrase "tròng kính viễn" (far-sighted lens).

Variants and Related Words

• Kính lão (Noun): Reading glasses. While "kính viễn" corrects hyperopia at any age, "kính lão" specifically refers to glasses for presbyopia (age-related farsightedness), which is a common usage overlap in everyday language.
• Viễn thị (Noun): Farsightedness; Hyperopia/Hypermetropia. This is the name of the condition that "kính viễn" corrects.
• Kính hai tròng / đa tròng (Noun): Bifocal / Progressive lenses. These lenses may contain a "viễn" (distance) section along with a "cận" (reading) section.

Synonyms

• Kính dương (Noun, less common): Literally "plus glasses," referring to the convex (+) lenses used.

Related Phrases / Collocations

• Đeo kính viễn: To wear far-sighted glasses.
• Cắt kính viễn: To have far-sighted glasses made/prescribed.
• Độ (của) kính viễn: The power/prescription (in diopters) of the far-sighted glasses.

1. Far-sighted glasses