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.
Authors
Dates
2008-01-10—Published
2006-03-10—Filed