Intraocular Lens Power Calculator

Formula

To calculate the Intraocular Lens Power (P):

\[ P = \frac{K - \left(\frac{AL}{1.336}\right)}{1 - \left(\frac{ACD}{AL}\right)} \]

Where:

\(P\) is the intraocular lens power
\(K\) is the corneal power in diopters (D)
\(AL\) is the axial length in millimeters (mm)
\(ACD\) is the anterior chamber depth in millimeters (mm)

What is an Intraocular Lens?

An intraocular lens (IOL) is a medical device implanted inside the eye to replace the eye’s natural lens when it is removed during cataract surgery. IOLs are also used for a type of vision correction surgery called refractive lens exchange. These lenses are designed to help restore vision by focusing light onto the retina, much like the eye’s natural lens. IOLs come in various types, including monofocal, multifocal, and toric lenses, each designed to address different vision needs and conditions. The power of the IOL is carefully calculated based on several factors, including the corneal power, axial length, and anterior chamber depth, to ensure optimal visual outcomes for the patient.

Example Calculation

Let's assume the following values:

Corneal Power (\(K\)) = 43.00 D
Axial Length (\(AL\)) = 24.00 mm
Anterior Chamber Depth (\(ACD\)) = 3.00 mm

Using the formula:

\[ P = \frac{43.00 - \left(\frac{24.00}{1.336}\right)}{1 - \left(\frac{3.00}{24.00}\right)} = \frac{43.00 - 17.96}{1 - 0.125} = \frac{25.04}{0.875} = 28.62 \text{ D} \]

The intraocular lens power is 28.62 D.