Patent ID: 7044604

Claim:
A method of calculating a predicted lens power needed to provide a post-operative spherical equivalent to correct myopia in a phakic eye of a patient using an intraocular lens, the method comprising the steps of: a. measuring pre-operative and post-operative characteristics of the eye, including spherical equivalent, vertex distance, anterior chamber depth, keratometry, desired post-operative spherical equivalent, and first eye residual intraocular lens power; and b. using each of the measured pre-operative characteristics and desired post-operative characteristics in a lens power prediction model to calculate the predicted lens power; and c. wherein the lens power prediction model is a mathematical formula using the measured pre-operative and desired post-operative characteristics of the eye and corresponding coefficients substantially as follows ⁢ 3.9546 ⁢ + 0.4001 * PreMSE ⁢ + 0.4272 * PreCSE ⁢ + ( PreMSE - ( - 12.6676 ) ) * ( ( PreCSE - ( - 12.5002 ) ) * - 0.2723 ) ⁢ + ( PreCSE - ( - 12.5002 ) ) * ( ( PreCSE - ( - 12.5002 ) ) * 0.1308 ) ⁢ + ( PreMSE - ( - 12.6676 ) ) * ( ( PreMSE - ( - 12.6676 ) ) * 0.155 ) ⁢ + - 0.7378 * ACD ⁢ + - 0.042 * AXL ⁢ + ( PreMSE - ( - 12.6676 ) ) * ( ( AXL - 27.6371 ) * 0.0843 ) ⁢ + ( ACD - 3.6609 ) * ( ( AXL - 27.6371 ) * 0.2639 ) ⁢ + ( PreCSE - ( - 12.5002 ) ) * ( ( ACD - 3.6609 ) * 0.1064 ) ⁢ + ( PreCSE - ( - 12.5002 ) ) * ( ( AXL - 27.6371 ) * - 0.0698 ) ⁢ + - 0.065 * PreKStp ⁢ + - 0.1043 * - POMSE ⁢ + - 0.2801 * POCSE ⁢ + ( POMSE - ( - 0.5511 ) ) * ( ( POCSE - ( - 0.4173 ) ) * 0.0675 ) ⁢ + 0.0027 * ⁢ Age ⁢ + ( Age - 39.4711 ) * ( ( PreKStp - 45.4349 ) * 0.007 ) ⁢ + ( PreCSE - ( - 12.5002 ) ) * ( ( ACD - 3.6609 ) * ( ( AXL - 27.6371 ) * - 0.028 ) ) ⁢ + 0.4752 * ⁢ First ⁢ ⁢ Eye ⁢ ⁢ Residual ⁢ + 0.40 * PredChgAveK wherein PreCMAv is a weighted average of the pre-operative cycloplegic and manifest spherical equivalents (PreCSE and PreMSE), AXL is the axial length, POMSE is the desired post-operative manifest spherical equivalent, POCSE is the desired post-operative cycloplegic spherical equivalent, PreKStp is the preoperative steep keratometry measurement, PredChgAveK is the predicted change in average keratometry, ACD is the anterior chamber depth, PreKAv is the pre-operative average keratometry, and First Eye Residual is the residual intraocular lens power found after the first eye surgery.