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Our Doctors

Meet the experienced and friendly doctors and staff who make Vision Source the leading provider of vision care products and services in Las Vegas, Nevada.

James A. Beckwith, O.D.

Dr. Beckwith received his bachelors degree in biology from the University of San Diego in 1984 and his Doctor of Optometry (OD) degree from the Southern California College of Optometry in 1988. He received hands-on training in externship programs at the Los Angeles Veterans Administration Hospital, the Santa Monica Center for the Partially Sighted, Norton Air Force Base, and Nellis Air Force Base. He opened his private practice in Las Vegas in 1990. Dr. Beckwith is a Diplomate of the American Board of Optometry and is also board certified in the treatment and management of ocular disease and is glaucoma certified. He is a member of The American Optometric Association, and the past President of the Nevada Optometric Association. Dr. Beckwith and his family have completed two medical mission trips providing free eye care in third world countries.


Mark R. Lee, O.D.

Dr. Lee grew up on a cattle ranch in south eastern Washington. He received his B.S. in agricultural economics from Washington State University in 1996, and his Doctor of Optometry (O.D.) degree from Pacific University in 2000. He received hands on clinical training at Golden Vision Center, Nellis Air Force base, and Pacific University extern clinics. Dr. Lee has practiced in Las Vegas since 2000, and he opened his private practice in 2004. He is a Diplomate of the American Board of Optometry and he is board certified in the treatment and management of ocular disease. Dr. Lee is actively involved in the American Optometric Association (AOA), he is currently the vice president of the Nevada Optometric Association and serves as the president elect of the Great Western Counsel of Optometry. Dr. Lee was presented with the 2013 Optometrist of the year award from the Nevada Optometric Association.

As an avid rock climber, Dr. Lee spends his days off scaling the cliffs at nearby Red Rocks and Mt. Charleston. He also enjoys his days outside with his wife Sash and their two children.


Alissa D. Nagel, O.D., F.A.A.O.

Dr. Nagel is a native of Las Vegas and attended the University of Nevada, Las Vegas where she received her bachelor’s degree in biology. She then moved to California to attend Southern California College of Optometry. She earned her Doctor of Optometry degree in 2007 and then returned to Las Vegas, where she completed her ocular disease residency at the VA Southern Nevada in Las Vegas. She enjoys practicing primary care optometry, treatment and management of ocular diseases, working with patients who need medically necessary contact lenses and providing ocular prosthetic services.

Dr. Nagel is an assistant professor with the Southern California College of Optometry teaching low vision optometry to a new generation of optometrists. She is also a Fellow of the American Academy of Optometry, a member of Women of Vision, American Academy of Optometry, the Nevada Optometric Association, and Foundation Fighting Blindness. Dr. Nagel is a Diplomate of the American Board of Optometry and is also board certified in the treatment and management of ocular disease as well as glaucoma certified. She serves as the current president of the Southern Nevada Optometric Society and was awarded Nevada’s Young Optometrist of the Year for 2016.


Chris – Office Manager