Revealing the Cu(2+) ions localization at low symmetry Bi sites in photorefractive Bi12GeO20 crystals doped with Cu and V by high frequency EPR.

The sites of incorporation of Cu(2+) impurity ions in Bi12GeO20 single crystals co-doped with copper and vanadium have been investigated by electron paramagnetic resonance (EPR). While the X-band EPR spectra consist of a simple broad (ΔB ∼50 mT) line with anisotropic lineshape, the W-band EPR spectra exhibit well resolved, strongly anisotropic lines, due to transitions within the 3d(9)-(2)D ground manifold of the Cu(2+) ions. The most intense group of lines, attributed to the dominant Cu(2+)(I) center, displays a characteristic four components hyperfine structure for magnetic field orientations close to a 〈110〉 direction.

[Handiness and acceptability of the new Abak bottle in chronically treated patients. A cross-sectional, retrospective and multicentre study].

Background: Difficulty of use of eyedrops is a factor associated with poor patient compliance that reduces treatment efficacy. The aim of this study was to evaluate the handiness and global acceptability of the new Abak timolol bottle (multidose preservative-free eyedrops) in comparison with that of other administration systems (classical multidose eyedrops or single-doses) in patients treated for glaucoma or ocular hypertension.

Methods: Cross-sectional, retrospective and multicentre study involving 41 ophthalmologists in France.

Ultrasound biomicroscopy study of the Verisyse aphakic intraocular lens combined with penetrating keratoplasty in pseudophakic bullous keratopathy.

Purpose: To evaluate anterior segment modifications after penetrating keratoplasty (PKP), previous anterior chamber intraocular lens (IOL) removal, and Verisyse IOL (AMO) implantation over the iris or under the iris for the treatment of pseudophakic bullous keratopathy (PBK) using ultrasound biomicroscopy.

Setting: Department of Ophthalmology, Poitiers University Hospital, Poitiers, France.

Methods: A prospective randomized comparative case series included 27 patients (27 eyes) with PBK who had PKP and implantation of a Verisyse VRSA54 aphakic IOL.

Penetrating keratoplasty combined with posterior Artisan iris-fixated intraocular lens implantation.

Purpose: To present a new surgical technique combining penetrating keratoplasty and open-sky posterior iris fixation of the Artisan iris-claw intraocular lens (IOL) for treatment of pseudophakic bullous keratopathy in a case series of five patients.

Methods: A graft diameter of 8.25 mm was chosen.

Intrastromal corneal ring segments and corneal anterior stromal necrosis.

Poly(methyl methacrylate) refractive intracorneal ring segments (ICRS) can be removed for a refractive miscorrection or for early complications after implantation. We report the first case of a woman who experienced anterior stromal necrosis 5 years after an ICRS surgical procedure.