Plastic Lens
Mostrando 1-6 de 6 artigos, teses e dissertações.
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1. Avaliação do laser Er:YAG como condicionador de esmalte e dentina para procedimento de união a materiais resinosos
The purpose of this study was to verify: 1) the energy levei that could produce the morphologic aspect similar to dental tissues conditioned with phosphoric acid on dental tissues irradiated by Er:Y AG (Yttrium aluminium gamet Y ~L5012) laser; 2) the tension bond strength of an adhesive system applied over enamel and dentin, after pretreatment with phosphori
Publicado em: 2003
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2. Confecção e caracterização óptica e estrutural de lentes plásticas obtidas pelo processo de injeção / Production and characterization optic and estructural of plastic lens made by injection process
The purpose of this work was the development and production of acrylic biconvex lens by injection process to be used in optical and science teaching at elementary and high schools. The importance of such work is based in the deficiency of experimental didactic material made in Brazil. In order to achieve the intended objective it was necessary to study the t
Publicado em: 2002
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3. Espectroscopia de lente termica : propriedades termicas de cristais liquidos
Liquid Crystals are fluids that present intermediate properties between solid and liquid, and consist of a molecular arrange with structural order. These systems are classified as Thermotropic Liquid Cristals, Lyotropie Liquid Crystals and Plastic Crystals. Since their discovery, these systems have shown to be an important area of condensed matter research.
Publicado em: 1997
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4. Visual evoked potential latency and contrast sensitivity in patients with posterior chamber intraocular lens implants.
An electrophysiological investigation of visual evoked potential (VEP) latency and contrast sensitivity was performed in a group of 13 patients who had undergone extracapsular cataract surgery with posterior chamber lens implantation. In spite of good postoperative visual acuity, abnormalities were detected in nine of the group (69%). This study suggests tha
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5. Aphakic macular oedema following prosthetic lens implantation.
Fluorescein angiography of the iris was performed on patients with plastic lens implants with cystoid oedema of the macula, and the nature of the vascular changes was compared with controls provided by patients who did not have macular disease. Densitometry was used to quantitate leakage of fluorescein dye into the anterior chamber in residual angiograms 5 m
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6. Synthesis of interleukin-1 and prostaglandin E2 by lens epithelial cells of human cataracts.
To test our hypothesis that pseudophakic inflammation, including the fibrin reaction, may be caused by cytokines, prostaglandins (PG), or both, synthesised by residual lens epithelial cells (LECs), we measured interleukin-1 alpha (IL-1 alpha) and PGE2 in the incubation medium of cultures of human LECs obtained by capsulotomy during cataract surgery. After 1