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Our Doctors


Cameron E. Smith, O.D.

Born and raised in Pasadena, Texas, a Houston suburb, Dr. Cameron Smith attended the University of Houston where he received a Bachelor of Science degree in Electrical Engineering. After graduation, he joined Moeller Electric Corporation, an international manufacturer of electric motor controls. During the next 20 years, Cameron rose from design engineer to regional Marketing Manager, designing complex control systems for use in power generating stations, wind generators, chemical plants, breweries, and food processing plants. Cameron’s passion was solving complex problems.

During this same period, Dr. Smith continued to maintain an interest in biology and physiology and was drawn to vision because the physics of optics and electrical waves are quite similar. So, in 1996 at age 42, Cameron left a successful career in engineering and began studies at the University of Houston College of Optometry where – not surprisingly – he was the oldest member of the Doctoral Class of 2000. Following graduation, Dr. Smith completed a 1 year Fellowship in Corneal and Contact Lens research, and co-authored a poster on Dry Eyes after Lasik.

From 2001 to 2006, Cameron served as an adjunct faculty member at the UH College of Optometry and was a practicing clinical Optometrist at several private practices in the Houston area. He found that he loved the hands-on clinical environment best, so in 2007, Dr. Smith moved from Houston to Mansfield and opened his own new Texas State Optical practice. He is still solving complex problems, only now in optics instead of electrical circuitry.

In his off time, Cameron enjoys boating and jet skiing and relaxes by reading, usually with a cup of warm coffee. An avid history buff, Dr. Smith is recognized for his knowledge of the military aircraft of World Wars I and II.


Shawn M. Prapta, O.D.

From an early age Dr. Shawn Prapta knew his dream was to become a doctor. Born and raised in Houston, TX, he received his high school diploma in only 3 years. Shawn enrolled at UT-Arlington where in 2007 he graduated with a Bachelor of Science degree in Biology. While at UTA, Shawn participated in the pre-Optometry program and worked at several Optometric practices, including TSO Mansfield, before beginning his Doctoral program. While in Optometry school he was a class leader and liaison for his fellow colleagues. Shawn’s last year of clinical training was focused on ocular disease and pathology. In May, 2012, he was awarded a Doctor of Optometry degree from the University Of Houston College Of Optometry. Immediately upon graduation, Dr. Prapta joined Dr. Cameron Smith at TSO Mansfield as a full time associate Doctor.

Dr. Prapta is a licensed Therapeutic Optometrist and Optometric Glaucoma Specialist. His main interests involve managing diabetes in the eyes, foreign body removals, and treating ocular infections. He has also received extensive ocular training in cataract and Lasik co-management. Dr. Prapta has been a guest speaker for the Tarrant County Diabetes collaboration where he presented on diabetes and its effects on the eyes. He is a member of the American Optometric Association, Texas Optometric Association, and the Tarrant County Optometric Society.

He and his wife Judy reside in Mansfield, and share their home with their 2 squirrel chasing canines and a couple of furry felines. Growing up, Shawn played competitive ice hockey and traveled all around the United States for tournaments. You can still find him playing hockey on Thursday evenings at the Parks Mall in Arlington. When not keeping cool on the ice, he enjoys attending Rangers and Cowboys games with his family.


Vicki T. Nguyen, O.D.

An Arlington native, Doctor Vicki Nguyen returns to North Texas to service the community that has shaped her. Dr. Nguyen earned her Bachelor of Science degree in Biology from the University of Houston in 2012. During her undergraduate studies, she was a member of the UH Pre-Optometry Professional Society and was accepted into the University of Houston College of Optometry.

During her training in both Dallas and Houston, Dr. Nguyen had the opportunity to see patients with a wide variety of ocular pathology and special needs. At Cedar Springs Eye Clinic in Dallas, she provided medical-based eye care with emphasis on specialty contact lenses, glaucoma, diabetes, and cataracts. Her second internship was in private practice, where Dr. Nguyen provided primary eye care for residents of northeast Dallas, which included managing and treating various eye infections, dry eyes, and LASIK. During her final semester at UHCO, Dr. Nguyen was selected to rotate through the Special Needs Adult and Pediatrics clinic and the Ambulatory Service Center, where she gained more insight into managing post-op cataract patients. While there, she performed comprehensive eye examinations on children and adults with cerebral palsy, Down syndrome, autism spectrum disorder, and other special needs conditions. Dr. Nguyen enjoys working with children as well as adults and has volunteered at the Special Olympics Opening Eyes event since 2012. As a student, Dr. Nguyen earned Letters of Excellence for her performance in clinic. During her last semester, she earned honors selection on her grand rounds presentation, awarded by the executive director of the University Eye Institute.

After completing her Doctorate of Optometry degree from the University of Houston College of Optometry, in 2016, Dr. Nguyen now joins Texas State Optical Mansfield. Dr. Nguyen has a passion for patient care and her goal is to provide an extraordinary and memorable experience with every patient. Like all Mansfield TSO doctors, she takes the time to thoroughly educate each patient about their eye health status.

Dr. Nguyen is a licensed Therapeutic Optometrist and Optometric Glaucoma Specialist. She is an active member of the American Optometry Association, Texas Optometry Association, and Tarrant County Optometric Society. Outside of seeing patients, she enjoys spending time with her family, traveling, playing volleyball, and of course, cheering on our home teams, the Dallas Cowboys and Dallas Mavericks!


Trishna K. Masters, O.D.

Born and raised in Arlington, TX, Dr. Masters has always dreamt of becoming an optometrist. Wearing glasses at an early age drew her to the optometrist office yearly. After high school, she was selected to be part of a seven year BS/OD program in Boston, MA. During her undergraduate studies, she was involved in the pre-optometry association. She received her Bachelor of Science degree in 2013 from the Massachusetts College of Pharmacy and Health Science University (MCPHSU).

While at optometry school, Dr. Masters was a student liaison in class council and was involved in the National Optometric Student Association (NOSA), and Student Volunteer Optometric Services to Humanity (SVOSH). As a student, she traveled to the Dominican Republic to provide free eye care and spectacles to hundreds of patients with the SVOSH program. Here, she genuinely learned to appreciate giving back to the community and understood the value of a pair of glasses to a person in need. During her clinical year of optometric training, she had the opportunity to diagnose, co-manage, and treat ocular diseases, trauma, and systemic related ocular conditions, such as diabetes. She also provided pediatric and geriatric comprehensive eye exams at the VA hospital, community health centers, and private practices throughout Boston, MA and Santa Fe, NM.

In 2016, Dr. Masters received a Doctor of Optometry Degree at the New England College of Optometry in Boston, MA. She completed a post-doctorate clinical residency at the SUNY State College of Optometry with an emphasis in Primary Eye Care. Throughout her residency, she trained with glaucoma specialists, retinal specialists, cataract and laser vision correction surgeons. Upon residency graduation in 2017, she worked at a private practice in Arlington, TX. Two years later in 2019, she has now joined Texas State Optical Mansfield as a full time optometrist. She is very excited for this opportunity and shares a passion, along with the other doctors, in providing excellent thorough eye care.

Dr. Masters is a licensed Therapeutic Optometrist and Optometric Glaucoma Specialist. She is an active member of the American Optometric Association, Texas Optometric Association, and the Tarrant County Optometric Society. Outside the office, she enjoys spending time with family, traveling the world, working out, trying out new foods, and rooting for all her Dallas teams, especially the Dallas Cowboys.


Sophia B. La, O.D.

A North Texas native, Dr. Sophia La was born and raised in Arlington, Texas and is the oldest child in her family. She graduated in the top 10 percentile of her high school class and was a recipient of the International Baccalaureate diploma. Dr. La then moved on to complete her undergraduate studies at UT-Arlington, where she graduated with a Bachelor of Science degree in Biology in 2013. Her studies then took her to the InterAmerican University of Puerto Rico – School of Optometry, where she had the opportunity to service underserved communities and gained valuable experience in treating various ocular diseases including diabetes, glaucoma, infections, and cataracts. Dr. La was also an active member of theAmerican Optometric Student Association and American Academy of Optometry (AAO) during her graduate studies, and in 2016 was a recipient of the J. Pat Cummings Scholarship, awarded by the AAO. Dr. La then graduated as valedictorian of her class and was awarded a Doctor of Optometry degree in June of 2018. Dr. La now joins the team of doctors at TSO Mansfield.

Dr. La is a licensed Therapeutic Optometrist and Optometric Glaucoma Specialist. Her passion lies in managing ocular conditions such as diabetic retinopathy and glaucoma, and in providing personalized comprehensive eye care for every patient. Dr. La enjoys enjoys working with both children and adults, and is proficient in providing comprehensive eye exams in both Spanish and Vietnamese.Outside of the office, Dr. La enjoys spending time with her family and friends, playing tennis and badminton, video games and movies, and arts and crafts.

Texas State Optical Midlothian is launching April 8th 2019. New TSO Location, Same Great Service!
TSO Midlothian launching March 2019

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