METHOD FOR DETERMINING FOCAL POWER OF UNIFORMLY CONVEX INTRAOCULAR LENS IN CARRYING OUT INTRACAPSULAR FIXATION FOR CORRECTING APHAKIA WITH VITREAL CAVITY TAMPONADE MADE WITH SILICON OIL Russian patent published in 2008 - IPC A61F9/00 A61F2/14 

Abstract RU 2314068 C1

FIELD: medicine.

SUBSTANCE: method involves determining anterior corneal surface curvature radius, eye length, distances from cornea top to external retina layers, anterior chamber depth, intraocular lens constant. Intraocular lens focal power is calculated. Uniformly convex intraocular lens focal power increment is additionally determined due to intracapsular fixation being done for correcting aphakia with vitreal cavity tamponade using silicon oil, and coefficient taking into account modified silicon oil refraction coefficient in vitreous cavity and intraocular lens material refraction coefficient as Diol =(D+a)/b, where Diol is the focal power of uniformly convex intraocular lens in performing intracapsular fixation for correcting aphakia with vitreal cavity tamponade using silicon oil in Dpt. D is the intraocular lens focal power in natural vitreous body in Dpt, where a=(Ns-1`.336)/(Lopt-ACDest)1000, where a is the uniformly convex intraocular lens focal power increment in performing intracapsular fixation for correcting aphakia with vitreal cavity tamponade using silicon oil in Dpt, Ns is the silicon oil refraction coefficient equal to 1.4034, b is the coefficient for taking into account modified silicon oil refraction coefficient in vitreous cavity and intraocular lens material refraction coefficient calculated from formula b=1/2 1(Nm-1.336)/2(n-1.336y), where Nm is the modified refraction coefficient in the vitreal cavity with uniformly convex intraocular lens that is determined from formula where n is the intraocular lens material refraction coefficient.

EFFECT: high accuracy of the method.

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RU 2 314 068 C1

Authors

Takhchidi Khristo Periklovich

Panteleev Evgenij Nikolaevich

Bessarabov Anatolij Nikitich

Isaeva Irina Shamil'Evna

Dates

2008-01-10Published

2006-03-10Filed