[PAUL D. HALPERN, O.D. Optometrist - Keratoconus and Glaucoma Specialist and General Eyecare Paul D. Halpern, O.D., a keratoconus specialist located in Norristown, PA. Serving keratoconus patients in Pennsylvania, New Jersey, and Delaware. Also providing routine eye care as well as eyeglasses, contact lenses, and corneal reshaping therapy for my]