Meira Neudorfer

Tel Aviv University, Tell Afif, Tel Aviv, Israel

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Publications (59)136.73 Total impact

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    ABSTRACT: Purpose: To investigate macular changes following strabismus surgery by using optical coherence tomography (OCT). Methods: The authors prospectively evaluated 60 eyes of 30 patients undergoing unilateral extraocular muscle surgery. OCT measurements employing the fast macular thickness mapping protocol were performed 1 day prior to surgery and 1 day postoperatively. Postoperative macular changes in the study eye that was operated on (n = 30) were compared with the fellow control eye (n = 30, controls). Results: There was an increase in mean ± standard deviation central foveal thickness (CFT) in the operated eyes, from 201.63 ± 18.36 µm at baseline to 206.03 ± 22.73 µm postoperatively (P = .024). Preoperative and postoperative perifoveal outer temporal quadrant thicknesses were 220.10 ± 16.23 and 225.80 ± 14.78 µm, respectively (P = .009). There were no differences between preoperative and postoperative retinal thickness measurements for all measured areas in the control eyes. Eyes that underwent surgery involving the rectus muscles showed a trend toward a greater CFT increase compared with eyes that had oblique muscle surgery (P = .070). Conclusions: The authors found subclinical increases in the foveal and perifoveal macular thicknesses following extraocular muscle surgery. These findings could be attributed to change in the mechanical forces caused by the new position of the extraocular muscles and transmitted via the sclera or, alternatively, to postoperative inflammation and alterations in the blood-retinal barrier. The clinical implications of these findings remain to be clarified. [J Pediatr Ophthalmol Strabismus. 2016;53(1):11-15.].
    No preview · Article · Feb 2016 · Journal of Pediatric Ophthalmology & Strabismus
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    ABSTRACT: Purpose: To report a unique ocular manifestation of immunoglobulin G4-related disease (IgG4-RD) as choroidal effusion. Methods: Case report. Results: An 81-year-old man presented with clinical manifestations of choroidal effusion, confirmed by fluorescein angiography, ophthalmic ultrasound (posterior segment), high-frequency ultrasound biomicroscopy, Heidelberg Spectralis spectral domain optical coherence tomography, and enhanced depth imaging spectral domain optical coherence tomography. Systemic multi-organ findings included chronic pancreatitis, irregularity of the intrahepatic bile ducts, lymphadenopathy, aortitis, fibrotic changes of the lungs, hypophysitis, and sialadenitis. Extensive workup revealed elevated IgG4 serum levels, and lymph nodes biopsy showed reactive pattern with polyclonal IgG4 positive plasma cells. These findings were compatible with IgG4-related disease. Treatment with oral corticosteroids resulted in complete resolution of the choroidal effusion. Conclusion: Choroidal effusion may be an ocular manifestation of IgG4-related disease. Oral corticosteroids is an effective treatment. Ophthalmologists should be aware of this possible finding.
    No preview · Article · Oct 2015
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    ABSTRACT: To assess the efficacy and safety of intraocular injections of bevacizumab in patients with macular edema (ME) following branch retinal vein occlusion (BRVO) and central retinal vein occlusion (CRVO). Retrospective, non-comparative case series. Patients ≥18 years of age with ME secondary to BRVO or CRVO who received a minimum of one intravitreal injection of bevacizumab with a follow-up >3 months were included. Primary endpoints were mean change in best corrected visual acuity (BCVA) from baseline to 12 and 24 months, and mean change in central macular thickness (CMT) after 3 injections. Secondary endpoints were mean change in BCVA and CMT from baseline to end of follow-up, number of injections, and ocular adverse events. Eighty-seven eyes with BRVO and 65 eyes with CRVO were included. Mean follow-up time was 24.4 and 26.1 months in the BRVO and CRVO groups, respectively. The mean change in BCVA was 0.25 LogMAR in the BRVO group and -0.118 LogMAR in the CRVO group. Visual acuity outcomes in the CRVO group were poorer, especially in patients with low baseline BCVA.
    No preview · Article · Aug 2015 · Albrecht von Graæes Archiv für Ophthalmologie
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    ABSTRACT: To investigate the changes over time in optical density (OD) characteristics of subretinal fluid (SRF) in rhegmatogenous retinal detachment (RRD) and their clinical relevance. The study included patients with first-onset RRD and no history of intraocular illness who underwent optical coherence tomography (OCT) and whose OCT scans showed sufficient SRF for sampling (08/2013-09/2014). The highest quality B-scan (as graded by the OCT image acquisition software) containing SRF was analyzed. Optical density measurements were obtained using ImageJ. Optical density ratios (ODRs) were calculated as SRF OD divided by vitreous OD. Time from onset of RRD was determined by first signs of visual loss as described in the patient's anamnesis. Patients were divided into three groups by RRD duration: acute (≤1 week), subacute (between 1 week and 1 month), and chronic (>1 month). Thirty-five eyes (34 patients) met the inclusion criteria. The ODR measurement was significantly associated with RRD duration. The ODR had a significant (P < 0.0001) association with the 3-month postoperative visual acuity (VA). Vitreous OD did not differ significantly between the three groups. The increase over time in the ODR of the SRF in RRD might reflect a change in SRF composition and state of the retina. This, together with a significant association between preoperative ODR values and postoperative VA suggest its potential as a biological prognostic marker.
    No preview · Article · Aug 2015 · Investigative ophthalmology & visual science
  • Y. Porat · I. Gabay · D. Varssano · I. Barequet · M. Neudorfer · M. Rosner · A. Katzir
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    ABSTRACT: Temperature controlled laser bonding of the cornea is analyzed in this paper using optical coherence tomography imaging, histological section evaluations and tensile strength measurements. The heat generated to obtain the bonding causes changes to the tissue structure, which appear as a bowl shaped lesion around the heated spot. Optical coherence tomography is established as an appropriate modality for the assessment of these lesions, using the other methods for validation. A quantitative analysis of the lesions attributes is produced, using a dedicated image processing algorithm. By means of this method we observed that the depth of the lesion is the most effective measure in estimating the extent of the tissue reaction to heat. A comparison of the measured lesion depth, produced by different heating profiles, is presented. This comparison shows a linear dependence on both the temperature and the exposure time, within the boundaries of the experiment. The bond strength was evaluated for several set temperatures (with 20 seconds heating time in each case) displaying an optimal value at 70°C. Yet if an incision was successfully bonded, it held a higher burst pressure for a higher temperature value. These findings demonstrate the plausibility of an integrated laser tissue bonding apparatus with an optical coherence tomography probe, which will provide, for the first time, a real time feedback of the tissue structural change, and indicate the bonding progress and end point.
    No preview · Article · Jan 2015
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    ABSTRACT: We sought to assess long-term changes in the flow parameters of retrobulbar vessels in diabetic patients. The retrobulbar circulation of 138 eyes was evaluated between 1994 and 1995 and 36 eyes were reevaluated between 2004 and 2008 (study group). They were divided into four groups: eyes of diabetic patients without diabetic retinopathy (DR), eyes with nonproliferative DR, eyes with proliferative DR, and eyes of nondiabetic patients (controls). Color Doppler imaging was used to assess the flow velocities in the major retrobulbar vessels. The resistive index (RI) was calculated and compared among the groups and between the two time periods. RI values of the central retinal artery and posterior ciliary artery had increased in the two non-DR groups and in the nonproliferative DR group, with a surprising decrease measured in eyes with proliferative DR (P= nonsignificant [NS]). Combining the nonproliferative DR and proliferative DR groups resulted in a milder increase of the RI of the posterior ciliary artery (P= NS) and the central retinal artery (P=0.02) in the DR group compared to the other groups. Our results demonstrate that an increase of the resistance in the retrobulbar vessels, as a part of DR, can lessen over time and may even be reversed.
    Preview · Article · Nov 2014 · Clinical ophthalmology (Auckland, N.Z.)
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    Nur Azem · Oriel Spierer · Meital Shaked · Meira Neudorfer
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    ABSTRACT: Background. Effects of hemodialysis (HD) treatment on retinal thickness and macular edema are unclear. Objective. To evaluate changes in retinal thickness using optical coherence tomography (OCT) in end stage renal disease (ESRD) patients with diabetic retinopathy (DR), with and without diabetic macular edema (DME), undergoing HD. Methods. Nonrandomized prospective study. Forty eyes of DR patients with ESRD treated with HD were divided into two groups: patients with macular edema and patients without macular edema. Both eyes were analyzed. Patients underwent an ophthalmic examination including OCT measurements of retinal thickness, blood albumin and hemoglobin A1C levels, blood pressure, and body weight, 30 minutes before and after HD. Results. We found no significant effects of HD on retinal thickness among patients both with and without DME. The former showed a trend towards reduction in retinal thickness in foveal area following HD, while the latter showed an increase. There was no correlation between retinal thickness and mean blood pressure, weight, kinetic model value-Kt/V, glycemic hemoglobin, or albumin levels before and after HD. Conclusions. HD has no significant effect on retinal thickness among patients with or without DME. Further studies on larger cohorts and repeated OCT examinations are needed to confirm the preliminary findings in this study.
    Preview · Article · Sep 2014 · Journal of Ophthalmology
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    ABSTRACT: The purpose of this four year retrospective study was to compare the anatomical and functional outcomes of complicated retinal detachment (RD) surgery by pars plana vitrectomy (PPV) with and without retinotomy. The main outcome measures were primary anatomical success (defined as retinal re-attachment at the final follow-up after a single operation, with or without silicone in situ), final anatomical success, final best-corrected visual acuity (BCVA) and postoperative complications. Baseline characteristics did not differ between the groups, although there was a borderline significant trend for the retinotomy group to be associated with worse pre-surgical ocular pathology. With a mean follow-up of 18 (±7.8) months, primary anatomical success was achieved in 76.7% (33 of 43) of the retinotomy group eyes vs. 67.8% (40 of 59) of the eyes in the group without retinotomy. Final anatomical success rates for the retinotomy group and no retinotomy group were 100 and 93.2% respectively. The final BCVA was 1.57 LogMAR with retinotomy and 1.38 without retinotomy, an improvement in both groups. The incidence of postoperative complications was similar in the two groups, while the frequency of macular holes was higher in the retinotomy group. A similar degree of improvement in BCVA following both surgeries indicates their similar efficacy and justifies their performance even in complicated eyes in order to improve the patients' quality of life. With neither approach superior to the other, the choice of method should be left to the surgeon.
    No preview · Article · Aug 2014 · Albrecht von Graæes Archiv für Ophthalmologie
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    ABSTRACT: To evaluate retinal and optical coherence tomography findings and establish their prevalence in preeclamptic women. Twenty-seven preeclamptic women who underwent clinical examinations with both slit-lamp biomicroscopy and optical coherence tomography were prospectively studied. Three of the 4 women (14.8%) identified by clinical examinations as having retinal findings related to preeclampsia had visual disturbances. Optical coherence tomography revealed retinal pathology in 2 women (7.4%) consisting of retinal edema, subretinal fluid, photoreceptors irregularities, and lesions at the retinal pigment epithelium level (Elschnig spots). The mean retinal nerve fiber layer thickness was significantly higher in women with pathologic funduscopic findings (P = 0.009) than in women with normal eye examinations. All women with ocular findings had severe preeclampsia and higher systolic blood pressure than women without ocular findings (P = 0.03). The prevalence of retinal involvement is high in severe preeclampsia and low in asymptomatic preeclampsia. Preeclamptic women diagnosed as having ocular involvement should be evaluated and monitored by optical coherence tomography, provided that their systemic condition allows it. Findings of retinal nerve fiber layer thickening in these women may indicate occult central nervous system involvement.
    No preview · Article · Jan 2014 · Retina (Philadelphia, Pa.)
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    Gilad Rabina · Shani Golan · Meira Neudorfer · Igal Leibovitch
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    ABSTRACT: Objective. To compare pre- and postoperative characteristics and surgical success rates of patients with and without previous episodes of dacryocystitis, who underwent external dacryocystorhinostomy (DCR) for nasolacrimal duct obstruction (NLDO). Methods. The medical files of all patients who underwent external DCR between 2006 and 2011 in our institution were reviewed. The retrieved data of patients with and without previous episodes of dacryocystitis were compared. Surgical success was determined by postoperative followup of at least 6 months. Results. A total of 185 patients with NLDO underwent external DCR of whom 152 (100 females and 52 males, mean age 67 ± 15 years) met the inclusion criteria. Sixty had previous episodes of dacryocystitis and 92 did not. Left-side obstruction was more common than right-side obstruction among patients with previous episodes of dacryocystitis (48.3% versus 31.7%, resp., P = 0.031). Glaucoma patients were significantly more likely to develop dacryocystitis than patients without glaucoma (P = 0.002). The success rate of external DCR was 94.4% for patients with previous episodes of dacryocystitis and 86.7% for patients without (P = 0.337). Conclusions. The surgical outcomes of external DCR in patients with or without a previous episode of dacryocystitis were similar. Patients with glaucoma and NLDO had a significantly higher risk of developing dacryocystitis.
    Full-text · Article · Dec 2013 · Journal of Ophthalmology
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    ABSTRACT: To evaluate the impact of corneal curvatures less than 35 diopters (D) after photorefractive keratectomy (PRK) on visual acuity outcomes. Visual acuity outcomes of 5,410 eyes that underwent PRK from January 2006 to November 2010 were retrospectively analyzed for the impact of postoperative corneal curvatures on visual outcomes. All procedures were performed on a single platform (Allegretto 200Hz excimer laser; Alcon Laboratories, Inc., Irvine, CA). Main outcome measures were postoperative corrected distance visual acuity (CDVA) and loss of CDVA. Corneas with a measured or a calculated postoperative flat meridian less than 35 D and those with a measured postoperative steep meridian less than 35 D had worse postoperative CDVA than corneas with meridians of either 35 D or more (P ⩽ .021). However, the preoperative CDVA was worse in the flatter curvatures in all comparisons performed (P ⩽ .024). Consequently, the measured or calculated meridian curvature had no effect on CDVA loss (P ⩾ .074). Postoperative corneal keratometry values (flat and steep meridians) less than 35 D did not have a predictive effect on the risk of losing visual acuity following myopic PRK performed on the Allegretto 200Hz excimer laser. [J Refract Surg. 2013;29(6):384-389.].
    No preview · Article · Jun 2013 · Journal of refractive surgery (Thorofare, N.J.: 1995)
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    ABSTRACT: Acute, as opposed to chronic, anterior uveitis is rarely associated with macular or optic nerve edema. Nevertheless, mild changes may not be visible on examination. To implement non-invasive ocular coherence tomography (OCT) for obtaining quantitative and qualitative data in the assessment of changes in macular morphology and peripapillary retinal nerve fiber layers in eyes with acute anterior uveitis. This retrospective case-control study was conducted in patients with unilateral acute anterior uveitis lasting for up to one month. Patients with evidence of other ocular disease or who had undergone intraocular surgery were excluded. We reviewed the charts of 14 consecutive patients who were diagnosed with acute unilateral anterior uveitis between 2007 and 2008 at the Tel Aviv Medical Center. Data on demographic details, ophthalmic examination, macular thickness and peripapillary retinal nerve fiber layer (RNFL) thickness (as demonstrated by OCT) were retrieved. Retinal and RNFL thickness was compared between the healthy fellow eye (control) and the uveitic eye in the central and four perifoveal quadrant regions, and RNFL thickness was compared in the mean and four quadrant values by Student's t-test. We evaluated 28 eyes of7 males and 7 females (mean age 37.7 years, range 20-65). The diagnoses were: idiopathic in five patients, ankylosing spondylitis in five, Crohn's disease in one patient and reactive arthritis in one. Nine patients were HLA-B27 positive. The retina and the peripapillary NFL in each area were thicker in the uveitic eyes compared to the controls. The difference was statistically significant. There was no correlation between the differences in OCT values and patients' demographic characteristics. OCT demonstrated that eyes with acute anterior uveitis had thicker maculae and thicker peripapillary RNFL than controls. This finding suggests that even milder anterior uveitis may be associated with some degree of posterior segment manifestations.
    No preview · Article · Sep 2012 · The Israel Medical Association journal: IMAJ
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    ABSTRACT: Eyes with persistent fetal vasculature (PFV) may be mistaken for retinoblastoma and provide a diagnostic challenge. This study aimed to evaluate the role of color Doppler imaging (CDI) in children with persistent fetal vasculature. Eyes with a diagnosis of PFV were evaluated by CDI. Twenty eyes of 17 children were included. All had a confirmed diagnosis of PFV based on one or more of the following: clinical findings on funduscopy, characteristic findings on imaging modalities (ophthalmic gray-scale US, CT and/or MRI), typical findings observed intraoperatively, and histopathological analysis (after enucleation in one case). Blood flow within the PFV was demonstrated in 19 eyes in this series. CDI is a noninvasive diagnostic tool that may add useful information on the presence of blood flow within the PFV and may substantiate the diagnosis of PFV in cases of uncertainty.
    No preview · Article · Jun 2012 · Pediatric Radiology
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    ABSTRACT: To examine whether isotretinoin therapy could result in deleterious ocular effects, as previously described in case report studies. Retrospective cohort study. The study was conducted using the electronic medical databases of a large health maintenance organization in Israel. The study population consisted of 14 682 adolescents and young adults who were new users of isotretinoin for acne and 2 age- and sex-matched comparison groups (isotretinoin-naive patients with acne and acne-free patients). Ocular adverse effects (AEs) or purchases of ophthalmic medications within 1 year after the first dispensed isotretinoin prescription. In total, 13.8% of the isotretinoin group experienced ocular AEs vs 9.6% of the isotretinoin-naive group and 7.1% of the acne-free group. During a 1-year follow-up period, the isotretinoin group had significantly higher risk for any ocular AEs (hazard ratio, 1.70; P.001) compared with the acne-free group. No such increased risk was observed for the isotretinoin-naive group. The isotretinoin group had higher relative risks for inflammatory and structural AEs. Isotretinoin use may be associated with short-term ocular events, especially conjunctivitis, underscoring the importance of educating patients and caregivers about these potentially important AEs of the therapy.
    No preview · Article · Apr 2012 · Archives of dermatology
  • Meira Neudorfer · Amit Weinberg · Anat Loewenstein · Adiel Barak
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    ABSTRACT: We investigated the optical density characteristics of 3subretinal spaces in neovascular age-related macular degeneration (AMD), diabetic retinopathy (DR), rhegmatogenous retinal detachment (RRD), central serous retinopathy (CSR), retinoschisis (RS), and pseudophakic cystoids macular edema (PCME). Patients in whom subretinal fluid (SRF) was detected by optical coherence tomography (OCT), and whose earliest OCT scans showed sufficient SRF for sampling that did not include tissue edges, were chosen for study. The highest quality B-scan containing SRF (as graded by the OCT image acquisition software) was analyzed. Optical density measurements were obtained using ImageJ, an open code Java-based image processing software. The diagnoses of the 71 patients who met the inclusion criteria were AMD in 17, DR in 7, RRD in 18, CSR in 17, RS in 8, and PCME in 4. Optical density ratios (ODRs) were calculated as SRF OD divided by vitreous OD. ODRs were significantly higher in patients with AMD, DR, CSR, and PCME than in those with RRD and RS. No significant difference in vitreous reflectivity was detected between the former and latter patients. The finding that disease states produce significant changes in optical density ratios calls for further investigation of the possible usefulness of the parameter in differentiating between disease states, determining the outcome of various retinal diseases, and designing therapies aimed at treating the disease by correcting the abnormal density.
    No preview · Article · Apr 2012 · Investigative ophthalmology & visual science
  • Amit Meshi · Meira Neudorfer · Elizabeth Fireman
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    ABSTRACT: The aim of this study was to establish a correlation between the diagnosis of ocular sarcoidosis and the presence of an elevated CD4/CD8 ratio in the induced sputum(IS) of patients with uveitis and no other systemic symptoms. This retrospective chart review study included all newly diagnosed uveitis patients treated between 1998-2006. IS examinations and determination of angiotensin-converting enzyme (ACE) levels were carried out. A CD4/CD8 ratio > 2.5 and an ACE level > 145 Cd/ml/min were considered abnormal. The etiology of uveitis was retrieved from the medical records. Twenty males and 26 females (mean age 47 +/- 16.1 years) were enrolled. The CD4/CD8 ratio was elevated in 26 (56.5%) patients, and five (10.9%) were diagnosed as having sarcoidosis by the end of follow-up. The sensitivity and specificity of the T lymphocytes CD4/CD8 ratio in diagnosing sarcoidosis were 100% and 48.8%, respectively. CD4/CD8 ratios were not significantly different between the sarcoid and non-sarcoid groups (p > 0.05), but the former tended to have higher levels (p = 0.0991). The mean ACE level of the sarcoid patients was significantly higher than that of the non-sarcoid patients (p < 0.001). CD4/CD8 lymphocytes ratios obtained by IS were sensitive in uveitis patients with concomitant sarcoidosis, suggesting that analysis of T cells subsets in IS may rule out an etiology of sarcoidosis in newly diagnosed uveitis patients.
    No preview · Article · Mar 2012 · Sarcoidosis, vasculitis, and diffuse lung diseases: official journal of WASOG / World Association of Sarcoidosis and Other Granulomatous Disorders

  • No preview · Article · Jan 2012 · Parkinsonism & Related Disorders
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    Rivka Kessner · Adiel Barak · Meira Neudorfer
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    ABSTRACT: To describe the spectral-domain optical coherence tomography (SD-OCT) findings in a case of Coats' disease, with emphasis on the intraretinal exudates. Case report of a 4.5-year-old girl who presented with total exudative retinal detachment and organized exudates in a stellate configuration. SD-OCT was performed before and after treatment, which included surgical drainage of subretinal fluid and indirect laser application during the surgery. At presentation, the SD-OCT showed an elevation of the foveal contour, with thickening of the retina, many exudates and a large quantity of subretinal fluid. Two months after the surgical treatment, SD-OCT revealed a significant reduction in the amount of subretinal fluids, but with persistence of the exudates. SD-OCT can be used as an important tool in order to describe the changes in each layer of the retina in Coats' disease. Considering the histopathological findings in Coats' disease, it is reasonable to assume that the exudates accumulate in the outer plexiform layer.
    Full-text · Article · Jan 2012 · Case Reports in Ophthalmology
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    ABSTRACT: Purpose: To evaluate the diagnostic yield of optic nerve ultrasonography (US) in distinguishing between papilloedema (swollen discs owing to raised intracranial pressure) and pseudopapilloedema. Methods: We prospectively evaluated all patients with bilateral optic disc swelling who underwent a complete neuro-ophthalmological examination. Suitable patients were referred for neuroimaging (computerized tomography or magnetic resonance imaging) and lumbar puncture. They underwent optic nerve US (A-mode and B-mode), and the findings were compared with the final clinical assessment. Sensitivity, specificity and predictive values for US distinction between true papilloedema and pseudopapilloedema were calculated and compared with those of the other imaging tests. Results: Forty-four patients were enrolled. Ultrasonography detected papilloedema with a high degree of sensitivity (85%) when the normal optic nerve width (ONW) was set at ≤3.3 mm, and with an even higher degree of sensitivity (95%) when the normal ONW was set at ≤3.0 mm. Ultrasonography had a high negative predictive value for detecting papilloedema: 83% when the normal ONW was set at ≤3.3 mm and 93% when it was set at ≤3.0 mm. There was a significant correlation between the US findings and the final diagnosis (p < 0.001) when the upper limit of the normal ONW was set at 3.0 mm. Conclusions: Ultrasonography findings of the ONW correlated well with the final diagnosis of papilloedema or pseudopapilloedema, especially when the upper limit of the normal ONW was set at 3.0 mm. Ultrasonography could be a useful non-invasive technique for differentiating papilloedema from other causes for swollen discs, such as pseudopapilloedema.
    Preview · Article · Sep 2011 · Acta ophthalmologica

  • No preview · Article · Jul 2011 · Retina (Philadelphia, Pa.)

Publication Stats

546 Citations
136.73 Total Impact Points

Institutions

  • 1992-2015
    • Tel Aviv University
      • • Department of Ophthalmology
      • • Department of Oncology
      Tell Afif, Tel Aviv, Israel
  • 1992-2012
    • Tel Aviv Sourasky Medical Center
      • Department of Ophthalmology
      Tell Afif, Tel Aviv, Israel