Intraoperative aberrometry
One of best features of intraoperative aberrometry is the ability to accurately confirm the toricity and correct meridian of alignment for toric IOLs
Leigh Spielberg
Published: Friday, March 3, 2017
I see this technology allowing us to go to new places that we otherwise wouldn’t consider with toric calculatorsVALIDATION CRITERIA Discussing the WaveTec/Alcon ORA and the HOLOS InSight from Clarity Medical Systems, Dr Hill said that intraoperative aberrometry is very sensitive to different vergences in different meridians. These relatively small differences are less influenced by the effective lens position. This aspect allows the measurement of the astigmatic portion of the total refractive error to be more accurate than the spherical portion. As an alternative, validation criteria combined with an advanced toric calculator which incorporates a method that takes into account the posterior cornea deliver refractive outcomes that are almost as accurate, he said. However, at the present time, intraoperative aberrometry appears to be the more accurate method. Dr Hill shared the results of a randomised, prospective study of 222 patients, which shows that residual astigmatism of ≤0.50D was achieved in 89.2% in the aberrometry series, and 76.6% in the toric calculator series, mirroring the results of other studies. “I see this technology allowing us to go to new places that we otherwise wouldn’t consider with toric calculators” he concluded. Warren Hill: k7wx@earthlink.net
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