Patient care services are open to the public and appointments can be made by calling 231-591-2020
1124 S. State Street, MCO 101A
Big Rapids MI 49307
Frequency doubling technology is a method of assessing visual field loss from ganglion cell loss in the retina. Ganglion cells are believed to be the earliest damaged by glaucoma. The frequency doubling effect occurs when black and white gratings are flickered at a very high rate. This test is a very reliable method to screen for glaucomatous damage.