BACKGROUND Pupillary block rarely occurs after cataract extraction with posterior chamber intraocular lens implantation. METHODS A series of six patients (seven eyes) treated for pupillary block after posterior chamber intraocular lens implantation between 1990 and 2001 is described; in one eye, the attack occurred after phacoemulsification. RESULTS The interval between pupillary block deve...

A cooperative clinical study of photodynamic therapy (PDT) for superficial esophageal carcinoma was conducted at 6 medical institution. PHE (2mg/kg) with high tumor affinity was used as the oncotropic compound. The light source was a pulse wave YAG-OPO laser with high penetration into the tissue. Irradiation was performed at an energy density of 60-180 J/cm(2) 48-72 h after PHE administration. ...

We report on optical detection of a single photostable Ce(3+) ion in an yttrium aluminium garnet (YAG) crystal and on its magneto-optical properties at room temperature. The spin quantum state of the emitting level of a single cerium ion in YAG can be initialized by a circularly polarized laser pulse. Coherent precession of the electron spin is read out by observing temporal behavior of circula...

In use of saturable Cr(4+):YAG crystals, we have demonstrated the stable Q-switched and mode-locked (QML) operation of the Nd:LuVO(4) laser. The operation range of QML in use of the Cr(4+):YAG is larger than that use of SESAM and NLM. The obtained shape of Q-switched envelope, repetition rate and pulse energy are demonstrated to depend on the initial transmittance of the Cr(4+):YAG and reflecti...

PURPOSE Several articles have been published on the successful elimination of iridolenticular synechiae after cataract extraction with a neodymium YAG laser (Nd:YAG laser) and surgical synechiolysis during cataract surgery, but the indications recommending which method is proper to use for specific kinds of adhesions have not yet been established. METHODS We retrospectively reviewed the medic...

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...

A 55-year-old man with myotonic dystrophy underwent phacoemulsification with IOL implantation in the right eye.3 months after surgery, the patient showed a decreased visual acuity and an intraocular pressure (IOP) of 30 mmHg. Slit lamp examination showed a dense fibrosis of the anterior capsule with capsulorexis' shrinkage. Gonioscopy showed a closed angle. After a YAG laser iridotomy no decrea...

A 37-year-old woman with a 20-year history of ulcerative colitis (UC) was admitted with complaints of cough and increasing sputum production. Chest computed tomography showed severe stenosis of the left main bronchus and bronchiectasis of the left lower lobe. Biopsy specimens from the area of bronchial stenosis showed chronic inflammation with lymphocyte infiltration, and we diagnosed respirato...

BACKGROUND Urethral polyps are rare benign pathologies seen in the male posterior urethra, more frequently originating from verumontanum. In this article, we aimed to discuss diagnosis and treatment of a urethral polyp causing hematuria and urinary infection in a 3-month-old male infant. This is the first case in the literature in which a urethral polyp is treated with Holmium yttrium-aluminum-...

We investigated the angular dependence of atomic and ionic debris from CO2 and YAG laser-produced tin plasmas. Several diagnostic techniques were employed for this study including a Faraday cup, witness plates and subsequent x-ray photoelectron spectroscopic analysis, optical emission spectroscopy etc. It was found that the debris emission from the Nd:YAG laser-produced plasmas fell sharply fro...