What is spectacles definition?

Spectacles, also known as glasses or eyeglasses, are devices that are worn on the face to correct vision or protect the eyes from harm. They consist of a pair of lenses mounted in a frame that rests on the nose and ears. Spectacles are primarily used to improve visual acuity by altering the path of light through the lenses. They are available in various types, including prescription glasses, reading glasses, bifocals, trifocals, progressive lenses, and sunglasses. Spectacles date back to ancient civilizations, with the earliest recorded use dating back to the 5th century BC. Today, spectacles are a common accessory for correcting vision problems and are worn by millions of people worldwide.