Dr. Mark Cowan began practice in Leesville at Thomas Vision Clinic in 1984 with his father-in-law, Dr. H.P. Thomas and his wife, Dr. Cherri Thomas Cowan, upon graduating from the University of Houston College of Optometry. He specializes in the diagnosis and treatment of eye diseases (glaucoma, cataracts, diabetic retinopathy, macula degeneration) and hard-to-fit contact lenses. He is a native of Kentucky, but loves his adopted state of LA. He is the father of two children, and enjoys duck hunting and saltwater fishing.
Meet Our Doctors
Dr. Clifton Mark Cowan, O.D.
What is Glaucoma?
Glaucoma occurs when the eye pressure increases and damages the optic nerve leading to impairment of visual acu...