Quantum Hall effect in a single-mode wire Kvon, Z. D.; Ol’shanestkii, E. B.; Katkov, M. I. ...
Semiconductors (Woodbury, N.Y.),
11/1999, Letnik:
33, Številka:
11
Journal Article
Background: To assess the safety and efficacy of the Amadeus microkeratome and to report on lessons learnt in optimizing results from its use.
Methods: A retrospective review of the flap‐related ...complications of 2000 laser in situ keratomileusis (LASIK) procedures performed by one surgeon using the Amadeus microkeratome (AMO, Irvine, CA, USA) was conducted. One hundred consecutive cases had preoperative and intraoperative pachymetry to evaluate the relationship between flap thickness, corneal thickness and reuse of the blade.
Results: There were 35 cases of minor epithelial defects (1.8%) and four eyes with major epithelial defects (0.2%). There were no cases of suction loss, buttonholes, or incomplete or damaged flaps. There were four free caps (0.2%). Twenty‐five cases had minor wrinkles and two cases had significant folds requiring relifts. Thinner corneas resulted in thinner flaps (P < 0.0001). Reuse of the blade resulted in thinner flaps (P = 0.0001).
Conclusion: The Amadeus is a safe and reliable microkeratome. Although short, there is a learning curve with use of the instrument. Corneal thickness and reuse of the blade affect flap thickness.
ABSTRACT
Two cases are reported of delayed diffuse lamellar keratitis after uneventful laser in situ keratomileusis. The first patient presented with an epithelial defect 6 weeks after laser in situ ...keratomileusis. Three days later the defect was healed but diffuse lamellar keratitis was noted. This was treated with topical dexamethasone and ketorolac with complete resolution of the diffuse lamellar keratitis over 3 weeks. The second patient presented with an epithelial defect and gross diffuse lamellar keratitis 10 weeks after laser in situ keratomileusis. Treatment was with topical dexamethasone and ciprofloxacin with gradual resolution of the diffuse lamellar keratitis. Common to both patients was a background of rosacea, implanted debris with no initial reaction, and epithelial defects leading to diffuse lamellar keratitis. It is suggested that these two cases represent epithelial defect associated corneal infiltration, which resembles classical diffuse lamellar keratitis with the spread of inflammatory cells through a path of least resistance.
Unilateral amiodarone keratopathy Chilov, Michael N; Moshegov, Con N; Booth, Frances
Clinical & experimental ophthalmology,
December 2005, 2005-Dec, 2005-12-00, Letnik:
33, Številka:
6
Journal Article
Recenzirano
Vortex keratopathy is characterized by bilateral symmetrical superficial corneal deposits in a vortex pattern. It is the most common ocular finding among patients being treated with amiodarone. An ...unusual case of unilateral amiodarone vortex keratopathy in an elderly woman with corneal dysplasia in the second eye is presented. The pathophysiology of amiodarone keratopathy is explored, and a cause for the unilateral keratopathy in this patient proposed.
We have studied the commensurability oscillations for a nonplanar, two-dimensional electron gas which is confined to a surface spatially modulated both in the transverse and longitudinal directions. ...We show, numerically, that coupling the drift in both directions causes the motion to be chaotic. The channeling tori, responsible for conduction along the stripes, are destroyed and the averaged squared drift velocities decrease.
