METHOD FOR FEMTOLASER PHACOEMULCIFICATION IN CASE OF NARROW RIGID DECENTRED PUPIL Russian patent published in 2017 - IPC A61F9/08 

FIELD: medicine.

SUBSTANCE: invention relates to medicine, in particular to ophthalmology, and is intended for ablation of crystalline lens with implantation of intraocular lens (IOL) in case of narrow rigid pupil and its decentring. Before dilating the pupil viscoelastic with molecular weight 600000-1650000 Da is introduced into anterior chamber. After dilation of the pupil polymer iris-retractor I-R-01-"MG" vendor code1592 is introduced into anterior chamber through corneal incision, pupillary ring is caught and centred, fixing retractor by pulling its rubber fixer to cornea. Distal end of iris-retractor is cut with 1-1.5 cm left outside. Viscoelastic is applied on cornea surface, soft contact lens is installed on interface of femtolaser installation, femtolaser interface is joined with eye, supply of vacuum into its interface is performed. Circular capsulorhexis is performed by femtolaser radiation with frequency 50 kHz, wavelength 1030 nm, energy of laser pulse 4,5-6 mcJ, height of femtolaser radiation cut 600-1150 mcm, spot diameter 5 mcm, distance between spots of laser impact 5 mcm. Fragmentation of crystalline lens core is performed by laser pulse energy 7-10 mcJ, height of femtolaser radiation 2800-3900 mcm, spot diameter 5 mcm, distance between spots of laser impact 7 mcm, and after implantation of intraocular lens iris-retractor and pupillary ring are removed. In case of 1-2 density degree fragmentation of crystalline lens core is performed by 3 radial cuts at equal angular distance from each other 306 mm long and 3-7 circular cuts, concentrically to limbus, at equal distance from each other with 1-6 mm diameter. In case of 3-4 degree of density fragmentation of crystalline lens core is by form of mutually perpendicular cuts, limited on periphery by circular cut with 2-4.5 mm diameter with originating from circular cut outwards 8 radial cuts, each being 0.7-1.5 mm long.

EFFECT: method makes it possible to form circular capsulorhexis of specified diameter, centred with respect to eye optic axis, in case of narrow rigid pupil with its decentring, which provided high functional result and increases quality of rehabilitation of patients, and reduces surgery trauma.

3 cl, 2 ex