Spectacles for myope and longsighted person e.g. instructor, has half-moon carried in top part of nose and leaving field of vision for myope to be free for reading document e.g. conference paper

摘要

The spectacles has a half-moon (3) carried in a top part of a nose and leaving a field of vision for a myope to be free for reading a document e.g. conference paper, where the half-moon is carried in a bottom part of the nose for a presbyope.