METHOD FOR ESTIMATING DIFFERENTIAL EXPONENTS FOR PERFORMANCE OF PRIMARY EXCIMER LASER CORRECTION OF WEAK AND AVERAGE MYOPIA WITH WEAK PHYSIOLOGICAL MYOPIC ASTIGMATISM Russian patent published in 2008 - IPC A61B3/103 A61B3/107 

FIELD: medicine; ophthalmology.

SUBSTANCE: method involves performing visometry, defining spherical and cylindrical components of a clinical refraction to calculate spheroequivalent of clinical refraction (SCR); performing ceratotopography; defining initial aberrations of higher orders (AHO) and calculating root-mean-square value of deviation of patient real wave front from ideal one at the expense of aberrations from 3 to 6 order (RMS (Z₃ ^±1-Z₆ ^±6). If SCR does not exceed 6.0 dioptre, at performing a ceratotopographic research presence of local irregularity of forward surface of a cornea is not taped, RMS value (Z₃ ^±1-Z₆ ^±6) makes up 0.11 to 0.45 mcm, and size of a spherical aberration of the fourth order (Z₄ ⁰) it is more minus 0.05 mcm, then the eximer laser correction of myopia with myopic astigmatism is prescribed. The said correction includes elimination of spherical and cylindrical components of a clinical refraction, as well of initial total aberrations of eye wave front and carrying out aspherical ablation of a cornea. If SKR does not exceed 6.0 dioptre, at performing a ceratotopographic research presence of local irregularities of cornea forward surface are not taped, RMS value (Z₃ ^±1-Z₆ ^±6) makes up 0.11 to 0.45 mcm, and size of a spherical aberration of the fourth order (Z₄ ⁰) is less than minus 0.05 mcm, then the eximer laser correction of of myopia with myopic astigmatism is prescribed, witch eliminates only spherical and cylindrical components of a clinical refraction.

EFFECT: possibility to choose an optimum influence.

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