Doctors & Staff

Meet the experienced and friendly doctors and staff who make Eagle Ranch Vision Source the leading provider of vision care products and services in Fort Worth.

William L. Aston II, O.D., P.C.

Therapeutic Optometrist / Optometric Glaucoma Specialist/Owner

Dr. William Aston graduated from Boswell High School in 1993. He received his BS in Biology while attending the University of North Texas in 1997. Then he went on to receive his Doctorate of Optometry in 2002 from the University of Houston College of Optometry. He completed externships at the Bellaire Contact Lens/Holladay Lasik Institute and the Eye Center of Texas.

He enjoys all outdoor activities especially water-skiing/wake surfing, dirt bikes, frisbee-golf, burning brush, yard work, deer-hunting, listening to good ‘ol country music, and loving Jesus and his family.

Melissa Aston, O.D.

Therapeutic Optometrist / Optometric Glaucoma Specialist/Owner

Dr. Melissa Aston graduated from MacArthur Highschool, Lawton, Ok in 1994. She received her B.A. in biology from the University of North Texas in 1998. Then in 2003 obtained her Doctorate of Optometry from the University of Houston College of Optometry. Her externships included Pickard and Fain Eye Care and Cornea Associates in Dallas, Texas.

She enjoys all outdoor activities including golf, tennis, snow-skiing, wake surfing and spending time with God and family.

Lori L. Russo, O.D.

Therapeutic Optometrist / Optometric Glaucoma Specialist

Dr. Lori Russo graduated from MacArthur Highschool, Lawton, Ok in 1994. She received her B.A. in biology from the University of North Texas in 1998. Then in 2003 obtained her Doctorate of Optometry from the University of Houston College of Optometry.

She enjoys all outdoor activities including golf, tennis, jogging, water and snow-skiing and spending time with family and Church.

Corey Giammarco, O.D.

Therapeutic Optometrist / Optometric Glaucoma Specialist

Dr. Corey Giammarco was born and raised in Arlington, TX and graduated from Lamar High School. He attended the University of Texas at Austin where he received a B.S. degree in Human Biology. He attended the University of Houston College of Optometry where he graduated Summa Cum Laude. While in optometry school, Dr. Giammarco was awarded the First Year Student of the Year. He received Clinical Letters of Excellence and was a member of the honor roll all four years of school.

He enjoys golfing, attending sporting events, and spending time with his wife and their pup.

Leigh Alexander, O.D.

Therapeutic Optometrist / Optometric Glaucoma Specialist

Dr. Leigh Alexander was born and raised in Lubbock, TX. Dr. Alexander attended The University of Texas at Austin where she graduated with a bachelor of science degree in Human Development and Family Sciences. During her last semester of undergraduate education, she completed an internship at the Texas School for the Blind and Visually Impaired.

Dr. Alexander attended University of Houston College of Optometry. She received a Clinical Letter of Excellence and was elected to the Gold Key International Optometric Honor Society. Dr. Alexander worked in Lubbock, TX, where she gained experience with heavy emphasis in ocular disease. She then moved to Fort Worth in 2019 and has been serving the Dallas-Fort Worth community ever since. Dr. Alexander is Board Certified in the state of Texas.

Dr. Alexander spends most of her free time with her husband and their Australian Shepherd, Beaux. She enjoys anything outdoors and cooking.

Georgia Spangenberg, O.D.

Therapeutic Optometrist

Dr. Georgia Spangenberg spent her childhood in both Oklahoma and California before graduating with a BA in Anatomy & Physiology from U.C. Berkeley. She went on to earn her Doctorate of Optometry from UCB’s School of Optometry. She was selected to complete a residency program at The Eye Institute in Philadelphia, PA where she gained additional experience in Primary Care Optometry.

She and her husband are blessed to have their 2 children also living in DFW, and she enjoys air shows, amusement parks, bobbing on waves, and strictly-for-pleasure bike rides.

Zane A. Vandiver, O.D.

Therapeutic Optometrist / Optometric Glaucoma Specialist

Dr. Zane Vandiver graduated from Memorial High School Tulsa, OK and attended the University of Oklahoma. He received his Doctorate of Optometry at the University of Houston in 1977. After practicing in Tulsa, for 13 years, he and his wife Ann wanted to get back to their native Texas and moved to Fort Worth in 1990.

He enjoys computers, electronics, and caring for his cats.