Ever bought a new pair of glasses and had the lenses cost more than the frames? It’s maddening! Optical 88 cuts basic lenses for $50, at least half of what most optometrists charge. Its own frame selection is fairly bland, so buy new frames elsewhere, drop them at the counter, and come back in a few hours for the finished product (116 Mott St., nr. Hester St.; 212-343-1947).