METHOD FOR CARRYING OUT YAG-LASER CAPSULORHEXIS IN VARIOUS CLINICAL CONGENITAL CATARACT FORMS IN CHILDREN

摘要

FIELD: medicine.;SUBSTANCE: method involves taking specific anterior capsule properties and subjacent lens layers state in various congenital cataract forms. Full cataracts having nebulous anterior capsule are treated with pulses of 1.2-2.0 mJ and continuous circular capsulorhexis with YAG-laser beam focused directly on the nebulous capsule. Atypical cataract with inhomogeneous anterior capsule destruction and underlying calcificates being the case, pulses of 0.8-2.0 mJ are used. The anterior capsule is opened in maximum nebulosity intensity places of the anterior capsule and subjacent calcificates with laser beam focused thereon. The continuous full circular capsulorhexis is finished by focusing on laser perforates periphery. Full and zonular cataract with transparent anterior capsule and cloudy subjacent layers being the case, pulse energy of 2.2-2.5 mJ is applied. These cases involve opening the anterior capsule with shock wave of YAG-laser radiation focused on nebulas in subcapsular layers. The full circular capsulorhexis is finished in these cases with focusing on laser perforates periphery. Pulse energy of 2.3-3.5 mJ is used in children having zonular and atypical cataract when the anterior capsule and subjacent lens layers are completely transparent. Gas bubbles are formed in anterior subcapsular lens layers using defocused laser treatment and complete capsulorhexis is carried out with focus set over the anterior gas bubble surface and laser perforate edges. Complete milk cataract being available, laser capsulorhexis is carried out beginning from lower segment from 6 o'clock 12 o'clock position clock- and counterclockwise.;EFFECT: enhanced effectiveness in making complete circular incision without overlaps.