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Intraoperative anterior segment OCT enables accurate prediction of postop IOL position
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 Oliver Findl |
VIENNA, Austria — Intraoperative use of Visante anterior segment optical coherence tomography (Carl Zeiss Meditec) integrated into the microscope helps measure and predict IOL position, leading to more precise results, according to one speaker here.
Several studies have shown that errors in prediction of IOL position account for 60% of postoperative refractive error. Standard formulas have proven inadequate, but new technological means show promise.
"We are very proud to say we are currently using the first operative microscope with an incorporated anterior segment OCT that provides continuous intraoperative measurements in the course of surgery," Oliver Findl, MD, said at the European Society of Cataract and Refractive Surgeons meeting.
In a study of 50 eyes of 50 cataract patients, standard surgery with the use of a capsular tension ring was performed. The Tecnis one-piece IOL (Abbott Medical Optics) was implanted in all patients. Bottle height was calibrated to maintain IOP at a constant value of 20 mm Hg.
Good prediction of postoperative IOL position and anterior chamber depth was obtained with OCT measurements. Using a capsular tension ring was essential, Dr. Findl said, because without it the capsule is wavy and has an irregular shape.
Intraoperative anterior segment OCT also shows promise for applications such as endothelial keratoplasty procedures, he said.
- Disclosure: Dr. Findl has no relevant financial disclosures.