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Tissue markers offer simple method for evaluating IOL rotation
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SAN DIEGO — The use of novel tissue markers as reference points is an inexpensive, accurate and easy method for evaluating the rotational characteristics of an IOL after surgery, according to a physician here.
Donald Nixon, MD, presented findings at the American Society of Cataract and Refractive Surgery meeting from a prospective evaluation of 26 patients scheduled for implantation of the Tecnis one-piece IOL (Abbott Medical Optics).
At the time of surgery, two marks were placed at the edge of the anterior capsule opening. High-resolution images were taken at the time of surgery and again at 1 day, 1 week, and at 1, 3, 6, 12 and 18 months postop.
"These [notches] are visible, very easily photographable and are followed out to a period of time," Dr. Nixon said. "So, you would have two reference marks then, relative to where the intraocular lens position is."
At 6 months, 92% of patients had a rotation of less than 5°, and 100% of patients had a rotation of less than 10° at 18 months, according to Dr. Nixon.
The biomechanical and biomaterial properties of the lens appeared to contribute to the IOL's stability after implantation. The Tecnis one-piece IOL seemed to display the rotational stability needed for toric and multifocal enhancements, Dr. Nixon said.
- Disclosure: Dr. Nixon is a consultant to AMO but has no financial interest in the methodology discussed in this article.