METHOD OF DETERMINATION OF OPTICAL FORCE OF INTRAOCULAR LENS AT EXTRACTION OF CATARACT AFTER EXCIMER LASER KERATOREFRACTIVE SURGERY Russian patent published in 2009 - IPC A61F9/00 A61F2/14 

FIELD: medicine; ophthalmology.

SUBSTANCE: method includes measurement of refraction of cornea, lengths of eye, prognosticated position of the intraocular lense (IOL) concerning the cornea top, led to cornea top the set ametropia pseudophakial eye and calculation of optical force of IOL under the formula. Determination of optical force make under formula Diol=(1336/(A-ACD-0.05))-(1.336/((1.336/Ks+R))-((ACD+0.05)/1000))) Diol - optical force of IOL, diopter.; ACD - prognosticated value of IOL position concerning cornea top; A - length of an eye, mm; R - the set ametropia of the pseudophakial eye led to cornea top; Ks=K (n-1)/(1.3375-1), where To - the refraction of a cornea measured value, diopter.; Ks - the modified value of optical force of a cornea; n=1.3331 - modified reduced indicator of diffraction of a cornea "IOL-MASTER", "Zeiss" company, Germany; ACD=pACD+0.3 (A - 23.5)+(tan K)² - (0.1 (23.5 - A)² (tan (0.1 (23.5-A)²))-0.99166 - prognosticated value of position IOL concerning cornea top; pACD personalised constant of IOL model; tan () - trigonometrical function of a tangent; R=RX / (1-0.012 Rx), where Rx - the set ametropia of the pseudophakial eye.

EFFECT: rising of accuracy of definition of optical force of intraocular lense.

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