Patient care services are open to the public. Appointments can be made by calling (231) 591-2020.
1124 S. State Street, MCO 101A
Big Rapids MI 49307
(231) 591-3991 (fax)
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.