METHOD FOR MEASURING OPTICAL POWER OF INTRACAPSULAR INTRAOCULAR LENS IMPLANTED INTO AVITREAL EYE Russian patent published in 2014 - IPC A61F2/14 

FIELD: medicine.

SUBSTANCE: method involves measuring the eye length, a curvature radius of an anterior corneal surface, a corneal refraction and an intraocular lens constant A. An echodensity of the vitreous body is additionally measured, while the optical power of the intraocular lens is determined by formula: $$D_{IOL}=\frac{1336\left(1336-L\frac{333}{R}\right)}{(L-p)\left(1336-p\frac{333}{R}\right)},$$ wherein D_IOL is the optical power of the intraocular lens, dioptre; L is the eye length, mm; 333/R is the standardised corneal refraction, dioptre; R is the curvature radius of the anterior corneal surface, mm; p is a distance of an anterior surface of the intraocular lens and the corneal apex (mm), determined by formula: $$p=R_{з}-\sqrt{R_{з}^2-\frac{{(d-\mathrm{1,82})}^2}{4}}+\mathrm{0,62467}\text{ A-71}\text{,433-0}{\text{,97 e}}^{\text{-0}\text{,82 I}},$$ R₃ is the curvature radius of the posterior corneal surface, mm; A is the intraocular lens constant; I is the echodensity of the vitreous body, MG; d is the corneal diameter, mm.

EFFECT: using the given invention enables providing more accurate measurement of the optical power of the intracapsular intraocular lens implanted into the avitreal eye.

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