purpose: to evaluate changes in anterior chamber (ac) parameters before and one month after nd:yag capsulotomy. methods: a total of 30 eyes from 27 patients with posterior capsule opacification graded 2-4 with surgical history of uneventful phacoemulsification and acrylic foldable iol implantation were included in this study. before capsulotomy and one month later, anterior chamber depth, volum...

a hypertrophic scar is defined as an excess healing response that is a dilemma for physicians. several therapies are available: intralesional corticosteroids, topical treatments, cryotherapy, surgery, radiation, silicone gel dressing and laser therapy.pulsed-dye, nd-yag and co2 lasers have been used for treatment of keloids and hypertrophic scars but recurrence is common. recently low-level las...

today laser has a lot of usage in medicine and dentistry. in the field of dentistry, laser is used in soft tissue surgery, sterilization of canals (in root canal therapy) and in restorative dentistry laser is used for cavity preparation, caries removal, sealing the grooves (in preventive dentistry), etching enamel and dentin, composite polymerization and removal of tooth sensitivity. the use of...

A 38 year-old girl with a recurrent suppurative pilonidal cyst was successfully treated causally with an Nd-YAG laser, and with no recurrence at the 3-month follow-up. A similar success is observed for another 15 consecutively treated patients, including suppurative cases. The effect could be attributable to the ability of the YAG-laser to operate at a wave-length of 1064 nm and to penetrate th...

Neuroendoscopy is presently considered a minimally invasive surgical approach. Comparatively, a microsurgical approach to ventricles allows using quickly several instruments and material for hemostasis, cutting and excision. Despite wonderful magnification recently improved, the bleeding control and tumor ablation are harmful by standard tools through the narrow channel of the neuroendoscope. S...

a 1 ZHANG, L., CHANDLER, P. I., TOWNSENO, P. D., and THOMAS, P. A.: ‘Helium ion implanted optical waveguide in KTiOPO,’, Electron. Lett., 1992, 28, pp. 650-652 Liu, YS., OENTZ, o., and BELT, R.: ‘High-average-power intercavity 2nd-harmonic generation using KTiOPO, in an acousto-optically Q-switched Nd-YAG laser oscillator at 5 KHz’, Opt. Lett., 1984, 9, pp. 76-78 VANHERZEELE, H., BIEXLEIN, 1. D...

The COMPASS tokamak, originally from UKAEA, Culham laboratory, U.K., will be reinstalled at Institute of Plasma Physics, Prague. The scientific programme is focused mainly on the investigation of the edge plasma region with high temperature and density gradients called pedestal. Many innovations will be done and new diagnostics have to be constructed. One of the key diagnostics is an incoherent...

Transscleral ruby cyclocoagulation has been successfully used to lower intraocular pressure. The recent commercial availability of Nd-YAG lasers with a thermal mode provides a possible alternative by which to perform this procedure. We treated one eye of seven pigmented rabbits using the thermal mode of the Nd-YAG laser. The intraocular pressures were followed up for three months. The treated e...

A first international comparison of I2-stabilized Nd : YAG lasers has been made between the National Research Laboratory of Metrology (NRLM), Tsukuba, Japan, the Joint Institute for Laboratory Astrophysics JILA (formerly the Joint Institute for Laboratory Astrophysics), Boulder, CO, the National Institute of Standards and Technology (NIST), Boulder, and the University of Colorado, Boulder. The ...

Encoded information based on synchronization of coupled chaotic Nd:YAG lasers in master-slave configuration is numerically studied. Encoding, transmission, and decoding of information in optical chaotic communication with a single channel is presented. We analyze the robustness of the encrypted audio transmission in a channel noise. In order to illustrate this synchronization robustness, we pre...