[Calculation of phakic intraocular lenses]

Area of Science:

• Ophthalmology
• Optics
• Biomedical Engineering

Context:

• High corneal astigmatism limits visual acuity with conventional correction.
• Significant ametropia causes discomfort with spectacles or contact lenses.
• Phakic intraocular lenses (IOLs) offer advanced correction for higher refractive errors.

Purpose:

• To present a matrix formalism for calculating toric phakic intraocular lenses.
• To demonstrate the application of this method with clinical examples.
• To introduce a software tool for facilitating phakic IOL calculations.

Summary:

• A matrix formalism, analogous to that used for toric pseudophakic implants, is applicable for toric phakic IOL calculations.
• Clinical examples illustrate the practical application of the matrix method.
• The Java-based program JPhakicIOL is provided for educational and experimental use in phakic IOL calculations.

Impact:

• Provides a standardized method for calculating toric phakic IOLs.
• Enhances understanding and precision in correcting high astigmatism and ametropia.
• Offers a valuable software tool for ophthalmologists, improving patient care and surgical planning.