Modern ophthalmic lenses and optical glass

Historical Significance: This book includes chapters on bifocal and trifocal lenses, telescopic spectacles, iseikonic lenses and an important chapter on contact lenses. The author was an early pioneer in contact lenses. See his text book on contact lenses Catalogue Number 95. Obrig was President of OBRIG Laboratories NY and an early pioneer of contact lens practice. Obrig was not an optometrist but a technical innovator who made contact lenses and taught ophthalmologists, optometrists and opticians how to fit them. He was doing this in the late 1930s. The first Obrig all-plastic contact lens was produced in 1938.