Calculations - Pdf: Biometry & Iol Power

Very high myopes (long eyes) or hyperopes (short eyes) require specialized formulas like the Wang-Koch adjustment.

Despite advanced technology, certain "difficult" eyes remain a challenge for biometry: Biometry & IOL Power Calculations - PDF

Once measurements are taken, they are plugged into mathematical formulas to predict the necessary lens power. These formulas have evolved through "generations" based on how they estimate the —the final resting place of the IOL in the eye. Very high myopes (long eyes) or hyperopes (short

Patients who have had LASIK or PRK have altered corneal shapes that traditional formulas often miscalculate. Biometry & IOL Power Calculations - PDF

Used a simple regression equation; often inaccurate for very long or short eyes.