IOL Power Calculation
Calculate intraocular lens power using the SRK/T formula for cataract surgery planning.
Clinical Application
IOL power calculation is essential for determining the appropriate intraocular lens implant power to achieve the desired postoperative refractive outcome.
SRK/T Formula
The SRK/T formula is a theoretical regression formula that improves upon the original SRK formula by incorporating a theoretical model for IOL power calculation.
Patient Factors
Accurate measurements of corneal curvature and axial length are critical for precise IOL power calculation and optimal surgical outcomes.
Calculation Parameters
Keratometry (K)
Measurement of corneal curvature, typically expressed in diopters (D). The average of K1 and K2 is used in calculations.
Axial Length
The distance from the corneal surface to the retinal pigment epithelium, measured in millimeters (mm).
A-Constant
An IOL-specific constant that relates to the estimated position of the lens within the eye after implantation.
Target Refraction
The desired postoperative refractive outcome, typically emmetropia (plano) for distance vision.