Spectacles, or eyeglasses, are optical appliances with lenses in a frame worn on the face to correct vision, enhance vision for specific tasks, or provide protection. They consist of lenses, which bend light to focus it properly on the retina, and a frame, which holds the lenses and has arms that rest over the ears and a bridge over the nose. The specific function of the lenses depends on the type, such as those for near-sightedness, far-sightedness, or astigmatism, and the frames can be chosen to suit individual tastes, needs, and budgets. 

1. Spectacles, or eyeglasses, are optical appliances with lenses in a frame worn on the face to correct vision
2. enhance vision for specific tasks or
3. provide protection

The specific function of the lenses depends on the type, such as those for near-sightedness, far-sightedness, or astigmatism, and the frames can be chosen to suit individual tastes, needs, and budgets.