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Dr. Janet Block

Dr. Block obtained her Bachelor of Science degree and Doctorate of Optometry degree from the University Of Houston College Of Optometry. Through their accelerated program, she earned both degrees in seven years, graduating in 1994. She was a member of the Dean’s List, Omicron Delta Kappa National Leadership Society, and Beta Sigma Kappa National Optometry Honor Society.

Dr. Block began her career working with ophthalmologists at Hermann Eye Center specializing in the fields of retina and oculoplastics. She has been associated with Vision Source for the past 7 years. While at Vision Source, she has continued with her education, earning an Optometric Glaucoma Specialist certification in 2000.

Dr.Block really enjoys spending time with her patients. She likes to make sure that all of their questions and concerns are addressed and that they have a great experience in our office. Outside of the office, Dr.Block enjoys many hobbies with her husband Steve including scuba-diving and dog agility competitions.

 

Dr. Wm. Gregg Simpson

Dr. Gregg Simpson has worked in the Humble/Kingwood area since 1987 and has been a member of Vision Source since it’s inception in June 1991. Before becoming an optometrist, Dr. Simpson served for nine years in the military as a United States Optical Laboratory instructor. During this time, he earned his Bachelor’s degree in Technical Management and Associate degree in Ophthalmic Theory and Technology from Regis University.

Dr. Simpson graduated in May 1994 with a Doctorate of Optometry degree from the University Of Houston College Of Optometry. While in Optometry College, he served as a teacher’s assistant in Ophthalmic Optics. He also received two Dean’s letters for clinical excellence. He was a member of the Fellowship of Christian Optometrists and as participated in many vision mission trips to third world countries. He is a therapeutic optometrist and a glaucoma specialist. He is certified by the American Board of Opticians and Certified Opticians of Texas. He is also a member of the Texas Optometric Association and American Optometric Association,

Dr. Simpson has been happily married to Nancy for 25 years. Both are members of Atascocita Lutheran Church and are very active in church affairs. Nancy has started her second year at the Lutheran Seminary of the Southwest in Austin for a Master of Divinity degree. Gregg’s hobbies include gardening, cooking, and golf. (Good at the first two).

 

Dr. Glenn Ellisor

Dr. Ellisor began practicing in the Humble/Kingwood Area in 1985. He is therapeutically certified and is an Optometry Glaucoma Specialist. Dr. Ellisor is the founder of Vision Source and has served on advisory panels for Ciba, Pilkington-Barnes Hind, Bausch & Lomb, Wesley Jessen and Alcon. He is a member of the American Optometric Association, the Texas Optometric Association and Harris County Optometric Association. Dr. Ellisor graduated from Stephen F. Austin University in 1982 with a degree in Biology and graduated from the University Of Houston College Of Optometry in 1984.