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Refractive predictions equally accurate with intraoperative aberrometry or formula
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COEUR D’ALENE, Idaho — No statistically significant difference in predicted refractive accuracy between intraoperative aberrometry and the Barrett True-K no history formula was seen when compared in cataract patients who had prior myopic laser refractive surgery.
In a poster presentation at the Women in Ophthalmology Summer Symposium, Karen L. Christopher, MD, and colleagues delivered results of a retrospective chart review of 69 eyes with a history of myopic laser refractive surgery that underwent cataract surgery using intraoperative aberrometry by two surgeons from March 2018 to April 2019.
“Post-refractive eyes can often be the most challenging and demanding patients, and the Barrett True-K no history formula and the ORA intraoperative aberrometer (Alcon) are two of the most common and successful techniques used to improve refractive outcomes,” Christopher, an assistant professor of ophthalmology at the University of Colorado, told Healio.com/OSN.
Both techniques were within 0.5 D of predicted value 65.2% of the time, with no significant discrepancy in the absolute prediction error between the two. Intraoperative aberrometry was accurate within 1 D 88.4% of the time, and Barrett True-K no history was similarly accurate 92.8% of the time.
“This is the first study to directly compare these two techniques, and we found that both have similar results in post-myopic laser refractive surgery eyes. When the two disagreed on predictions, half of the time Barrett TKNH was the more accurate one, and half of the time ORA was the more accurate,” Christopher said.
In the 41 instances that the two techniques disagreed on the lens to be implanted, 21 times intraoperative aberrometry gave the better prediction and 20 times the formula gave the better prediction.
“Neither technique proves superior to the other, so surgeons must carefully consider whether there is a reason in a particular case why one technique might be better than the other,” Christopher said. – by Eamon Dreisbach
Disclosure: Christopher reports no relevant financial disclosures.
Reference: Christopher KL, et al. Accuracy of intraoperative aberrometry versus Barrett True-K no history in cataract surgery patients with prior myopic laser refractive surgery. Presented at: Women in Ophthalmology Summer Symposium; Aug. 22-25, 2019; Coeur d’Alene, Idaho.