The document discusses various methods for calculating intraocular lens (IOL) power for cataract surgery, including the importance of accurately measuring corneal power, axial length, and lens position. It describes older applanation ultrasound techniques and newer non-contact technologies like the IOLMaster, noting the IOLMaster provides the most accurate axial length measurements. The document also reviews generations of IOL power calculation formulas and factors to consider like capsule status when selecting the appropriate formula.
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