The latest update to LENSTAR LS900® software adds two IOL calculation formulas to your optical biometer. The Masket and Modified Masket formulas are now available and recommended for post-laser refractive patients with known history of the refractive change induced by the laser surgical procedure.
The Shammas No-History formula already incorporated into LENSTAR’s software allows easy and reliable IOL prediction for post-myopic LASIK and PRK patients lacking any clinical history.
Peer-reviewed research has indicated that LENSTAR LS900 delivers extremely reliable keratometry for toric IOLs, during a procedure that captures five scans, on two eyes, with seven key measurements, including lens thickness, in approximately three minutes.
About the New Formulas
The Masket Method was developed by Samuel Masket, M.D. to provide reliable IOL power calculation for post-myopic and hyperopic LASIK and PRK patients when clinical history is available. This postoperative regression method was originally presented in the Journal of Cataract and Refractive Surgery. Its accuracy was recently confirmed in several peer-reviewed journal articles.
The Modified Masket relies on a slight amelioration of the regression formula. Using the linear relationship between the spherical equivalent of the total amount of the stable laser vision correction (LSE), it adjusts the IOL power calculation based on the Holladay I formula. Like the Masket Method, Modified Masket is appropriate for myopic and hyperopic LASIK and PRK patients.
The Shammas No-History formula addresses the challenge of calculating IOL power for patients after myopic LASIK and PRK, when there is no clinical history available. Several studies have validated the efficacy of the Shammas No-History, including research published in 2011 by McCarthy et al., and a 2010 study by Wang et al.
Download the New Software
To update to the latest software, visit mylenstar.com and click on the EyeSuite link below LENSTAR resources.
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