Essential parameters for IOL power calculation are
Correct Answer: Keratometry and axial length of the eyeball
Description: Calculation of IOL power (Biometry) : The most common method of determining IOL power uses a regression formula called 'SRK (Sanders, Retzlaff and Kraff) formula'. The formula is P = A - 2.5L - 0.9K where: P is the power of IOL, A is a constant which is specific for each lens type. L is the axial length of the eyeball in mm, which is determined by A-scan ultrasonography. K is average corneal curvature, which is determined by keratometry. The ultrasound machine equipped with A-scan and IOL power calculation software is called 'Biometer&;. Ref:- A K KHURANA; pg num:-196
Category:
Ophthalmology
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