Apparatus for selecting an intraocular lens and a method of selecting the intraocular lens
An intraocular lens selection apparatus and an intraocular lens selection method for selecting an intraocular lens to be implanted into an examinee's eye. The apparatus has an input unit which inputs corneal wavefront aberration of the eye, a memory which stores wavefront aberrations of a plurality of intraocular lens models, an unit which sets, as a target value, desired post-operative residual wavefront aberration of the eye after the lens is implanted, an unit which calculates, as an estimated value, post-operative residual wavefront aberration of the eye to be obtained when each lens model is implanted, based on the inputted corneal wavefront aberration and the stored wavefront aberration of each lens model, and specifies one of the lens models which renders the estimated value close to the set target value, a monitor, and a display control unit which controls the monitor to display information of the specified lens model.
1. An intraocular lens selection apparatus for selecting an intraocular lens (IOL) to be implanted into an examinee's eye, the apparatus comprising:
storing means which stores information on a plurality of IOL models and IOL calculation formulae, the information including a model name, an A constant, and spherical aberration;
first input means which inputs information on any one of a wavefront aberration and an eye refractive power of the examinee's eye, and corneal information including a three-dimensional shape of a cornea of the examinee's eye;
second input means which inputs information necessary to determine an IOL diopter including an ocular axial length of the examinee's eye;
setting means which sets, as target values, a residual wavefront aberration and an eye refractive power of the examinee's eye after the IOL is implanted;
calculation means which (1) obtains a corneal wavefront aberration of the examinee's eye with a corneal aberration assumed to be zero based on the three-dimensional shape of the cornea, and (2) obtains one of the plurality of IOL models and a refractive power which are closest to the set target values based on the obtained corneal wavefront aberration, the information stored in the storing means, and the information input by the first and second input means;
display means; and
control means which controls the display means to display a result obtained by the calculation means.
2. The intraocular lens selection apparatus according to claim 1 , wherein the control means controls the display means to display a simulation of how a predetermined object is visually perceived by the examinee's eye when the one of the plurality of IOL models is implanted.