half-glasses

[haf-glas-iz, hahf-glah-siz]
noun (used with a plural verb)
  1. a pair of eyeglasses, often shaped like the lower half of regular eyeglasses, containing lenses to aid in reading and not suitable for distance vision.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for half-glasses

Historical Examples of half-glasses