Dr. Williams was the Chief of Vitreoretinal Surgery Service at William Beaumont Hospital from 1992 until 2000, when he became Chairman of the Department of Ophthalmology. Dr. Williams is also a Clinical Professor of Biomedical Sciences at The Eye Research Institute of Oakland University in Rochester, Michigan.

Dr. Williams special interest is advanced vitreoretinal surgery for complex retinal detachment and diabetic retinopathy. He has authored or co-authored over one hundred publications in peer-reviewed medical journals, book chapters, and publications from national clinical trials. Dr. Williams is an internationally recognized speaker. He is currently the Principal Investigator of several research trials sponsored by the National Eye Institute and the pharmaceutical industry.

Dr. Williams has been President of both the Vitreous Society (now The American Society of Retinal Specialists) and Michigan Ophthalmological Society. He has been named to America's Who's Who in Medicine, The Best Doctors in America, and The Best Doctors in the Midwest. He serves as Chairman of the American Academy of Ophthalmology's Ophthalmic Technology Assessment Committee for retinal diseases and is a member of the Health Policy Committee. He is an associate examiner for the American Board of Ophthalmology and a member of the American Medical Association, Retina Society and Macula Society.

2005  Drenser KA, Williams GA, Fu AD, Egan C, Hykin PG, Dugel PU, Rao PK. Diagnostic and therapeutic challenges. Progressive bilateral visual loss over the last seven years. Retina 25(6):778-83005.

2005   Williams GA. The promise and perils of combination therapy. A discussion of off-label treatments for age-related macular degeneration. Retinal Physician (2) No. 5, September/October.

2005  M. Hermel, M. Mahgoub, T. Youssef, M. I. Azrak, H. Raza, C. Alldredge, M. Trese, G. A. Williams, M. Hartzer, Safety profile of the intravitreal streptokinase-plasmin complex as an adjunct to vitrectomy in the rabbit, Graefe's Archive for Clinical and Experimental Ophthalmology, Pgs. 1 – 7.

2005  Williams GA. Proper usage of off-label drugs. Review of Ophthalmology. May , Pgs. 100-103.

2006  Williams GA. Macular holes: the latest in current management. Retina Supplement, 26(6): S9-S10.

2006  Williams GA. Reimbursement changes needed for physician-administered drugs. Special Report. Retinal Physician, July/August,  pgs 58-59.

2006  Hermel M, Mahgoub M, Youssef T, Azrak MI, Rza H, Alldredge C, Trese M, Williams GA, Hartzer M. Safety profile of the intravitreal streptokinase-plasmin complex as an adjunct to vitrectomy in the rabbit. Graefe’s Arch Clin Exp Ophthalmol. 244:996-1002.

2006  Williams GA, Relationship between macular hole size and the potential benefit of internal limiting membrane peeling. [Comment. Editorial] Br J Ophthalmol. 90:1216-1217.

2006  Costa R, Williams GA. Twofold illumination photodynamic therapy scheme for subfoveal choroidal neovascularization in pathologic myopia: Results from a randomized pilot study. Retina 26(7):757-764, September.

2007  Kuppermann, BD, Blumenkranz, MS, Haller, JA, Williams, GA, Weinberg, DV, Chou C, Whitcup SM for the Dexamethasone DDS Phase II Study Group. Randomized controlled study of an intravitreous dexamethasone drug delivery system in patients with persistent macular edema. Arch Ophthalmol. 125:309-317.

2007  Lai MM, Williams GA. Anatomical and visual outcomes of idiopathic macular hole surgery with internal limiting membrane removal using low-concentration indocyanine green. Retina 27:477-482.