Intraocular lens and manufacturing method thereof

Abstract

Provided is an intraocular lens having a novel structure with high utility which is easy to adapt to patients, and can improve quality of vision (QOV). In an intraocular lens, an optical characteristic is set rotationally symmetric around an optical axis, and a spherical aberration of a size corresponding to a coma aberration remaining in a patient's eye after extraction of a human lens of the eye is set.

1 . An intraocular lens comprising:
 an optical portion being set with a spherical aberration as a corrective optical characteristic for a residual irregular astigmatism in a human eye of a patient, the spherical aberration being of an amount for which a spherical aberration and a coma aberration remaining in the human eye of the patient from which a human lens was extracted is not offset, wherein
 a high-order aberration of the optical portion is rotationally symmetrical around an optical axis, and 
 the coma aberration is a value selected from the group consisting of:
 (i) an RMS value; 
 (ii) a value found based on cornea topography measurement values obtained using a keratometer, a reflex keratometer, or a wave surface sensor; and 
 (iii) a value expressed as a synthetic vector volume of a horizontal coma aberration and a vertical coma aberration which are C 3   1  and C 3   −1  terms with Zernike polynomials obtained by performing wave aberration analysis, and 
 
 the spherical aberration set for the optical portion has the RMS value that satisfies all of the following formulas, where A and B are constants:
   Intraocular lens spherical aberration= A +( B ×Patient age);
 
   −0.4 ≦A  (μm)≦−0.1; and
 
   0.003 ≦B  (μm)≦0.004.
 
 
   
     
     
         2 . An intraocular lens comprising:
 an optical portion being set with a spherical aberration as a corrective optical characteristic for a residual irregular astigmatism in a human eye of a patient, the spherical aberration being of an amount for which a spherical aberration and a coma aberration remaining in the human eye of the patient from which a human lens was extracted is not offset, wherein
 a high-order aberration of the optical portion is rotationally symmetrical around an optical axis, and 
 the coma aberration is a value selected from the group consisting of:
 (i) an RMS value; 
 (ii) a value found based on cornea topography measurement values obtained using a keratometer, a reflex keratometer, or a wave surface sensor; and 
 (iii) a value expressed as a synthetic vector volume of a horizontal coma aberration and a vertical coma aberration which are C 3   1  and C 3   −1  terms with Zernike polynomials obtained by performing wave aberration analysis, and 
 
 the spherical aberration set for the optical portion is set by using a difference between an average value of measurement data of human eye spherical aberrations of a population of a same-age bracket with the patient and the spherical aberration of a cornea of the patient.