Texas Children’s and Baylor College of Medicine pediatric ophthalmologist Dr. Evelyn Paysse and Baylor College of Medicine refractive surgery specialist Dr. Mitchell Weikert have spent nearly two decades giving children with certain eye conditions hope of better vision.
The work they are doing focuses on children with amblyopia, a condition that if left untreated can lead to permanent vision loss.
“Amblyopia is a condition where the vision, in either one eye or both eyes, does not develop normally,” Weikert said. “If one eye has a lot more need for glasses, the brain may ignore that eye, and focus on the eye that’s creating a clearer image. If that happens, and it’s not discovered, or isn’t treated optimally, a child may never develop the vision they could have had in that eye and might end up with what we call a lazy eye, or amblyopia.”
The solution Paysse and Weikert are offering to patients who have not had success with traditional therapies such as wearing glasses or contacts, and patching the better-seeing eye, is a procedure called photorefractive keratectomy or PRK.
“Photo refractive keratectomy is a surface ablation of the cornea using an excimer laser,” Paysse said. “The laser shaves away, or somewhat sculpts, the cornea, taking away a certain amount of it to reduce the refractive error.”
The desired outcome of PRK is that the child’s refractive disorder will be improved or corrected and that their brain will then be able to better develop the vision in the weaker eye. Thus far, the majority of the more than 180 patients Paysse and Weikert have operated on have had excellent results.
“We find that the patients respond better if they are treated at a younger age,” Paysse said. “The reason is that amblyopia is a time-sensitive problem that you really must treat before the patient is visually mature in the brain.”
One patient who had success with PRK is 8-year-old Lila McLaughlin. Lila was born three months early with a myriad of vision problems that eventually led her and her mother, Laura, to Paysse, who performed PRK surgery on Lila just before her second birthday. The surgery, and a subsequent procedure, changed Lila’s life.
“She went into surgery and came back with what I say was a new set of eyes,” said Lila’s mother, Laura McLaughlin said.
Prior to PRK surgery, Lila’s vision was deteriorating quickly causing the toddler to become legally blind in one of her eyes. After undergoing PRK, Lila could see almost perfectly.
“This surgery has given her a healthy outcome,” Laura McLaughlin said. “Lila has blossomed into a phenomenal, fun-loving, feisty firecracker of a third grader.”
Lila herself is extremely thankful for the care she received from Paysse and others at Texas Children’s who have participated in her care.
“She’s a really great doctor,” Lila said. “She successfully helped me see way better than I used to.”
Currently, PRK surgery is not approved by the Federal Drug Administration in children. All the patients Paysse and Weikert have treated are part of a study led by the Institutional Review Board of Baylor College of Medicine, a consortium of committees that checks doctors’ protocols making sure they are designed safely.