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  • Haag-Streit has added two more IOL calculation formulas to its Lenstar LS900 optical biometer: the Masket and the Modified Masket. The new formulas are recommended for patients with a history of refractive laser surgery.

    According to Haag-Streit, the Masket method uses the patient's clinical history and offers reliable IOL power calculations for post-myopic and hyperopic laser refractive surgery.

    The Lenstar LS900 already has the Shammas no-history formula, designed for IOL prediction in cases in which there are no clinical histories. It can perform complete biometrical assessment in a single procedure, including lens thickness, anterior chamber depth and retinal thickness.