The Omega 7 Magnifier is a modern ergonomically designed professional magnifying lamp. It has a large 7in diameter 3 diopter (1.75X) lightweight acrylic lens and high power LEDs with 2 brightness levels for clear viewing. the internal spring arm allows accurate positioning. An optional 5in diameter 5 diopter (2.25X) lens and a 12 diopter (4.0X) swing arm lens is available seperately.