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The Wortz-Gupta® formula has only been studied for correction of corneal astigmatism < 1.25D using a femtosecond laser at a 9.0mm optical zone and 80% depth, opened manually at time of cataract surgery. This calculator is not intended to be a substitute for surgical judgment. Surgeons should always use their own judgment when deciding upon treatment based on all factors available. User discretion is advised. For comments or suggestions, please contact