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Doctors & Staff

Meet the experienced and friendly doctors and staff who make Refined Sight a proud provider of vision care products and services in Missouri City.


Dr. Linda Pham

Dr. Linda Pham graduated with honors from The University of Houston with a Bachelor of Science in Biology and a minor in Chemistry. Upon completion of her undergraduate degree, Dr. Pham attended The University of Houston College of Optometry where she received her Doctorate of Optometry degree. During her clinical education, Dr. Pham received Clinical Letters of Excellence and completed extensive training at Mann Eye Institute and Laser Center in Houston and Humble, Cedar Springs Eye Clinic in Dallas, San Jose Clinic in Houston and the Neuro-Optometric Rehabilitation Clinic.

Dr. Pham’s interest in ocular disease and her passion for providing the finest eye care for her patients, led her to spend the next 10 years practicing at a multi-specialty ophthalmology practice alongside a distinguished ophthalmologist.

Dr. Pham is Therapeutic Optometrist and an Optometric Glaucoma Specialist. She is licensed to diagnose, manage and treat ocular diseases such as glaucoma, macular degeneration, cataracts and diabetic retinopathy. Additionally, Dr. Pham manages ocular injuries, including traumatic foreign body removals. She is experienced in contact lens fitting including patients with dry eyes and keratoconus. Additionally, Dr. Pham manages pre- and post-operative cataract surgery and laser vision correction patients.

Outside of practicing, she enjoys her time with her family and traveling.


Dr. Xavier Gregorio

Dr. Gregorio is native to California, born and raised in a small suburb on the Pacific coast. He earned his undergraduate degree in Biological Sciences at the University of California, Davis, where he quickly learned his true passion was to become a Doctor of Optometry.

Afterwards, he moved to Houston to attend the prestigious University of Houston College of Optometry. Throughout his doctoral training, Dr. Gregorio participated in a variety of specialty clinics, which provided a wealth of knowledge and experience in patient care and managing ocular disease, including glaucoma and diabetic retinopathy. He is also experienced in fitting specialty contact lenses including multifocal and scleral lenses, and co-managing cataract, retinal and refractive surgeries.

Dr. Gregorio is a licensed Therapeutic Optometrist, allowing him to diagnose and treat various eye disorders and diseases.

In his free time, Dr. Gregorio enjoys traveling and exploring all that Houston has to offer with his wife and 2 sons.