[Intraocular pressure after cataract extraction by Nd:YAG laser with a wave length of 1.44 mcm].
The purpose of the study was to analyze in detail the condition of intraocular pressure (IOP) in cataract extraction performed by means of a new device, which was designed by us and which is based on the use of Nd:YAG laser with a wave length of 1.44 mem. 320 eyes were examined on a randomized basis in 212 patients after laser cataract extraction. According to the obtained results at the initial stage of using the technique in question (the first study group) there was registered a significant growth of IOP (Po) as compared with the preoperative level; besides, the easy discharge coefficient went down during the early postoperative period. However, Po did not exceed the upper norm limit in 92% of cases. The tonographic parameters recovered during 2 months after surgery. As the developed variant of the surgical technique was made use of (the second study group), the obtained results turned out to be better. Fixation of the working heads in the center of the operative field and as far as possible from the ocular sensitive zones was the most important condition of safe surgery. When the optimal surgical technique was combined with preserving a stable layer of viscoelastic during the whole time period of destruction of the nucleus, then it was possible, in the early postoperative period, to avoid an increase of mean Po values and a decrease of the easy discharge coefficient. The maximum values of IOP (Po) were found to be normal in 91.8% of cases. The conducted study proves that the technique, worked out by us, does not cause any pronounced changes in the hydrodynamics of an operated eye, which suggests a more sparing nature of laser action as compared to that of ultrasound.
Andreev
Iu V
IuV
D000368:Aged; D000369:Aged, 80 and over; D002387:Cataract Extraction / Q000379:methods*; D005500:Follow-Up Studies; D006801:Humans; D007429:Intraocular Pressure; D053685:Laser Therapy; D008875:Middle Aged; D011184:Postoperative Period; D013997:Time Factors