1. Articles in category: Ophthalmology

    11089-11112 of 11369 « 1 2 ... 460 461 462 463 464 465 466 ... 472 473 474 »
    1. Intravitreal Colchicine Causes Decreased RNFL Birefringence without Altering RNFL Thickness

      purpose. To test the hypothesis that longitudinal differences between retinal nerve fiber layer (RNFL) birefringence, measured by scanning laser polarimetry (SLP), and RNFL thickness, measured by optical coherence tomography (OCT), are informative about the state of axonal degeneration. methods. Colchicine was injected into the vitreous cavity of one eye in each of six vervet monkeys (Chlorocebus sabaeus; estimated vitreal concentration: 1 mM, n = 3; 2 mM, n = 1; 10 mM, n = 2); an equivalent volume (approximately 0.1 mL) of sterile saline was injected into fellow control eyes. RNFL birefringence was measured by SLP before injection and every 10 minutes ...
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    2. Accuracy of cornea and lens biometry using anterior segment optical coherence tomography.

      Related Articles Accuracy of cornea and lens biometry using anterior segment optical coherence tomography. J Biomed Opt. 2007 Nov-Dec;12(6):064023 Authors: Dunne MC, Davies LN, Wolffsohn JS We assess the accuracy of the Visante anterior segment optical coherence tomographer (AS-OCT) and present improved formulas for measurement of surface curvature and axial separation. Measurements are made in physical model eyes. Accuracy is compared for measurements of corneal thickness (d(1)) and anterior chamber depth (d(2)) using-built-in AS-OCT software versus the improved scheme. The improved scheme enables measurements of lens thickness (d(3)) and surface curvature, in the form ...
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    3. Effect of prophylactic nonsteroidal antiinflammatory drugs on cystoid macular edema assessed using optical coherence tomography quantification of total macular volume after cataract surgery.

      Related Articles Effect of prophylactic nonsteroidal antiinflammatory drugs on cystoid macular edema assessed using optical coherence tomography quantification of total macular volume after cataract surgery. J Cataract Refract Surg. 2008 Jan;34(1):64-69 Authors: Almeida DR, Johnson D, Hollands H, Smallman D, Baxter S, Eng KT, Kratky V, Ten Hove MW, Sharma S, El-Defrawy S PURPOSE: To evaluate the efficacy of prophylactic administration of the topical nonsteroidal antiinflammatory drug (NSAID) ketorolac tromethamine 0.5% on acute (within 4 weeks of surgery) cystoid macular edema (CME) and total macular volume (TMV) in patients having phacoemulsification cataract surgery. SETTING: Department of ...
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    4. Anterior segment biometry with 2 imaging technologies: Very-high-frequency ultrasound scanning versus optical coherence tomography.

      PURPOSE: To determine the interchangeability of 2 anterior segment imaging systems: a very-high-frequency (VHF) ultrasound scanning system (Artemis 2, Ultralink LLC) and an optical coherence tomography (OCT) system (Visante, Zeiss). SETTING: Vissum Instituto Oftalmologico de Alicante, Alicante, Spain. METHODS: This study comprised 20 eyes without pathology or previous surgery. The anterior chamber depth (ACD), central corneal thickness (CCT), angle-to-angle distance (ATA), and the iridocorneal angle size (IAS) at the 0-degree and 180-degree positions were measured with 2 imaging techniques: VHF ultrasound scanning and OCT. Analysis of agreement and interchangeability was performed by the Bland and Altman method. In addition, each ...
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    5. Corneal diameter measurements by corneal topography and angle-to-angle measurements by optical coherence tomography: Evaluation of equivalence.

      PURPOSE: To determine the equivalence of corneal white-to-white (WTW) diameter and anterior segment angle-to-angle (ATA) measurements. SETTING: Vissum Instituto Oftalmologico de Alicante, Alicante, Spain. METHODS: Thirty eyes of 19 patients ranging in age from 20 to 51 years old with no previous ocular surgeries were included in this study. In all cases, the horizontal WTW diameter was measured with a tool provided by the CSO corneal topography system (Costruzione Strumenti Oftalmici) and the horizontal ATA was measured using an optical coherence tomography (OCT) system (Visante, Carl Zeiss Meditec AG). All measurements were repeated 3 times to evaluate intrasession repeatability. The ...
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    6. Flap thickness reproducibility in laser in situ keratomileusis with a femtosecond laser: Optical coherence tomography measurement.

      PURPOSE: To compare ultrasound (US) pachymetry, Orbscan, and optical coherence tomography (OCT) measurements of the central corneal thickness (CCT) before laser in situ keratomileusis (LASIK) and evaluate the reproducibility of flaps created with the IntraLase femtosecond laser (IntraLase, Inc.) using OCT. SETTING: Department of Ophthalmology, IIsan Paik Hospital, Goyang, Korea. METHODS: Central corneal thickness was measured using OCT, US pachymetry, and Orbscan in 59 eyes of 30 patients before femtosecond laser LASIK. The postoperative corneal flap thickness, measured using OCT, was compared with the preoperative intended thickness. RESULTS: Optical coherence tomography, US pachymetry, and Orbscan measurements provided similar CCT values ...
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      Mentions: Jeong H. Kim
    7. Lasik Flap thickness reproducibility. IntraLase Femtosecond laser ...

      LASIK Flap thickness reproducibility. IntraLase Femtosecond laser. "Optical coherence tomography was comparable to US pachymetry and Orbscan in cornea thickness measurement." Posted on December 29th, 2007 by info@sujanani.com LASIK Eye Surgeons in Goyang, Korea and Daejeon, Korea; utilized ultrasound (US) pachymetry, Orbscan, and optical coherence tomography (OCT) to measure central corneal thickness (CCT) in 30 patients before LASIK procedures using flaps formed with the IntraLase femtosecond l
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      Mentions: Jeong H. Kim
    8. Tuberculosis and OCT

      Tuberculosis. Curr Opin Ophthalmol. 2007 Nov;18(6):493-501 Authors: Tabbara KF PURPOSE OF REVIEW: The purpose of this report is to present an update on the manifestations and management of ocular tuberculosis. RECENT FINDINGS: Tuberculosis affects one-third of the world's population. The incidence of tuberculosis has increased with the increase in the HIV infected population. Following a resurgence of the disease in the US, the incidence has recently declined. Patients may develop scleritis that can be focal, nodular or diffuse with or without keratitis. Anterior granulomatous uveitis may occur. The posterior segment reveals vitritis, choroiditis, and can mimic ...
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    9. Assessment of anterior segment parameters under photopic and scotopic conditions in Indian eyes using anterior segment optical coherence tomography.

      Related Articles Assessment of anterior segment parameters under photopic and scotopic conditions in Indian eyes using anterior segment optical coherence tomography. Indian J Ophthalmol. 2008 January-February;56(1):17-22 Authors: Dacosta S, Fernandes G, Rajendran B, Janakiraman P Purpose: To compare the anterior segment parameters in photopic and scotopic conditions using anterior segment optical coherence tomography (AS OCT) in Indian eyes. Materials and Methods: One hundred eyes of 100 normal subjects of both sexes, aged 19 to 76 years, underwent anterior segment evaluation by AS OCT (VisanteTM OCT). Central corneal thickness (CCT), central anterior chamber depth (ACD), pupil diameter (PD ...
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    10. High-resolution imaging of retinal cells in the living eye.

      During diseases such as age-related macular degeneration, glaucoma, or retinal degeneration, visualizing and counting retinal cells would be of interest to diagnose early stages and to determine the short-term progression rate of these conditions. This is of major interest to optimize neuroprotective/regenerative therapies in these slowly progressive diseases. Such cellular imaging is already feasible in the eye of laboratory animals. In the near future, it is likely that visualization of individual neuronal cells in humans will become a routine clinical procedure, thanks to continuous technological improvements in optical imaging technologies. In mice, commercially available confocal scanning laser ophthalmoscope (cSLO ...

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    11. Use of anatomical measures of idiopathic macular hole obtained through optical coherence tomography as a predictive factor in visual results: a pilot study.

      PURPOSE: To evaluate the anatomy of idiopathic macular hole (IMH) using Optical Coherence Tomography (OCT) and to construct a prognostic index that can be correlated with the visual outcomes and the anatomical closing. METHODS: Prospective study, in which 22 eyes with IMH had been evaluated through OCT in the daily postoperative period of IMH surgery. The Prognostic of Macular Hole Index (PMHI) was created which was correlated with the anatomical result and the postoperative visual acuity (VA) six months after surgery. RESULTS: Sixteen eyes (72.7%) got anatomical closing at the end of six months of follow-up. On analysis of ...
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    12. Intravitreal pegaptanib sodium (Macugen) for refractory cystoid macular edema in pericentral retinitis pigmentosa.

      Related Articles Intravitreal pegaptanib sodium (Macugen) for refractory cystoid macular edema in pericentral retinitis pigmentosa. Int Ophthalmol. 2007 Dec 22; Authors: Querques G, Prascina F, Iaculli C, Noci ND The purpose of this paper was to describe a patient with pericentral retinitis pigmentosa (RP) and cystoid macular edema (CME) refractory to oral acetazolamide alone who was successfully treated with adjunctive pegaptanib sodium. A 33-year-old man presented with decreased vision and a best-corrected visual acuity (BCVA) in his left eye of 20/200 due to CME secondary to RP. Although he had been treated daily for 1 month with 500 mg ...
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    13. The status of diabetic retinopathy and diabetic macular edema in patients with type 2 diabetes: a survey from Beixinjing District of Shanghai city in China.

      The status of diabetic retinopathy and diabetic macular edema in patients with type 2 diabetes: a survey from Beixinjing District of Shanghai city in China. Ophthalmologica. 2008;222(1):32-6 Authors: Wang N, Xu X, Zou H, Zhu J, Wang W, Ho PC Diabetic macular edema (DME) is the major cause of vision loss in patients with diabetic retinopathy (DR). The purpose of this study was to assess the prevalence of DR and DME in a community in China and to analyze the characteristics of their optical coherence tomography (OCT) images. This study was an incidence survey based on data ...

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    14. Effects of Endogenous Cyclotronic Ionic Resonance (icr) on Macular Diabetic Edema: Preliminary Results.

      Effects of Endogenous Cyclotronic Ionic Resonance (ICR) on Macular Diabetic Edema: Preliminary Results. Electromagn Biol Med. 2007;26(4):293-8 Authors: D'Andrea P, Maurizio L The intent in this research was to verify the effects of the application of low frequency magnetic fields to cases of macular diabetic edema. We treated six patients afflicted by non-proliferating diabetic retinopathy with macular oedema. Quantitative clinical appraisals of the retinal thickness were obtained for the Optical Coherence Tomography (OCT I). None of the cases affected by non-cystoid macular oedema (non-CMO), or with a relevant ischemic component, evidenced by retinal fluorangiography, had further ...
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    15. Rat model for anterior segment intraocular surgery induced blood-retinal barrier breakdown.

      Rat model for anterior segment intraocular surgery induced blood-retinal barrier breakdown. Ophthalmologica. 2008;222(1):42-7 Authors: Xie MS, Xu GX, Huang Y PURPOSE: To develop a practical rat model of blood-retinal barrier (BRB) breakdown induced by anterior segment intraocular surgery. METHODS: A 27-gauge needle attached to infusion tubing running to a bottle of balanced salt solution was inserted through the limbus into the rat anterior chamber. The pressure of the balanced salt solution was oscillated from 0 to 12 mm Hg above the atmospheric pressure for 30 times. The needle was removed and the anterior chamber was formed. Then ...
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    16. Early OCT changes of neuroretinal foveal thickness after first versus repeated PDT in AMD.

      Early OCT changes of neuroretinal foveal thickness after first versus repeated PDT in AMD. Int Ophthalmol. 2007 Dec 20; Authors: Landa G, Bukelman A, Katz H, Pollack A Purpose To compare early optical coherence tomography (OCT) changes in neuroretinal foveal thickness (NFT) after first versus repeated photodynamic treatment (PDT) in eyes with choroidal neovascularization (CNV) due to age-related macular degeneration (AMD). Methods This is a prospective comparative case series study. Consecutive AMD patients, treated with PDT due to subfoveal CNV, were enrolled. The eyes were divided into two groups: group A included eyes that had received the first initial treatment ...
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    17. Study on macular morphology after removal of the idiopathic epiretinal membrane using the optical coherence tomography (OCT): a pilot study

      PURPOSE: To describe the relation between visual results and macular morphology through optical coherence tomography (OCT) in patients submitted to removal of the idiopathic epiretinal membranes. METHODS: Ten eyes of ten patients with diagnosis of idiopathic epiretinal membranes underwent standard 20-G pars plana vitrectomy. Posterior hyaloid attachments were identified and dealt with. Idiopathic epiretinal membranes were removed in all cases. Corrected visual acuity, retinography, fluorescein angiography, fundus biomicroscopy and the optical coherence tomography in the pre- and postoperative periods were performed in all patients. In OCT, three characteristics were considered in each image: presence of foveal depression, presence of cystoid ...
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    18. Assessment of anterior segment parameters under photopic and scotopic conditions in Indian eyes using anterior segment optical coherence tomography

      The Eye Research Foundation, Vijaya Hospital, Chennai, India Correspondence Address: Dacosta Shaun The Eye Research Foundation, Vijaya Hospital, 180 NSK Salai, Chennai - 600 026 India Purpose: To compare the anterior segment parameters in photopic and scotopic conditions using anterior segment optical coherence tomography (AS OCT) in Indian eyes. Materials and Methods: One hundred eyes of 100 normal subjects of both sexes, aged 19 to 76 years, underwent anterior segment evaluation by AS OCT (Vis
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    19. Maculopathy in uveitis of juvenile idiopathic arthritis: an optical coherence tomography study

      Aim: The aim of this study was to examine the frequency and characteristics of macular lesions observed in juvenile idiopathic arthritis (JIA) uveitis, using optical coherence tomography (OCT). Methods: In this cross-sectional study, 38 consecutive patients were recruited from a tertiary referral center in uveitis. All eyes with JIA uveitis underwent complete ophthalmic examination including OCT 3. Exclusion criterion was the inability to obtain OCT scans. Flare and visual acuity were also analysed by using linear regression. Results: We analysed foveal thickness (FT) and central foveal thickness (CFT), using software mapping, to describe macular lesions in 61 eyes. Maculopathy was ...
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    20. Efficacy of intravitreal bevacizumab for polypoidal choroidal vasculopathy

      Aims: The aim of the study was to assess the short-term efficacy of intravitreal injections of bevacizumab for polypoidal choroidal vasculopathy (PCV). Methods: Intravitreal bevacizumab (1 mg) was injected into 11 eyes of 11 patients with PCV in this retrospective, interventional case series. The main outcome measure was the change in the polypoidal vessels on indocyanine green angiography (IA) 3 months after injection. The foveal height determined by optical coherence tomography and the best-corrected visual acuity (BCVA) also were evaluated before and after treatment. Results: At baseline, subretinal fluid was observed in five eyes and a pigment epithelial detachment in ...
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