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Documenta Ophthalmologica. Advances in Ophthalmology

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https://www.readbyqxmd.com/read/28508299/intensity-response-function-of-the-photopic-negative-response-phnr-effect-of-age-and-test-retest-reliability
#1
Nabin R Joshi, Emma Ly, Suresh Viswanathan
PURPOSE: To assess the effect of age and test-retest reliability of the intensity response function of the full-field photopic negative response (PhNR) in normal healthy human subjects. METHODS: Full-field electroretinograms (ERGs) were recorded from one eye of 45 subjects, and 39 of these subjects were tested on two separate days with a Diagnosys Espion System (Lowell, MA, USA). The visual stimuli consisted of brief (<5 ms) red flashes ranging from 0.00625 to 6...
May 15, 2017: Documenta Ophthalmologica. Advances in Ophthalmology
https://www.readbyqxmd.com/read/28451988/correlation-of-macular-structure-and-function-in-a-boy-with-primary-foveomacular-retinitis-and-sequence-of-changes-over-5%C3%A2-years
#2
Anurag Badhani, Tapas Ranjan Padhi, Gopal Krishna Panda, Sujoy Mukherjee, Taraprasad Das, Subhadra Jalali
PURPOSE: To describe the clinical characteristics, macular structure and function, and to document sequential changes over 5 years in a 10-year-old boy with bilateral primary foveomacular retinitis. METHODS: A 10-year-old boy presented with sudden onset scotoma in both eyes, experienced after getting up from bed on a non-eclipse day. He persistently denied direct sun-gazing. He neither had any significant systemic illness, nor was using any medications. In addition to a detailed examination at presentation that included fundus fluorescein angiogram (FFA), electroretinogram (ERG), pattern ERG and electrooculogram (EOG), he was examined periodically for 5 years with Humphrey visual field (HVF), spectral domain optical coherence tomogram (SDOCT), Amsler grid charting and multifocal ERG...
April 27, 2017: Documenta Ophthalmologica. Advances in Ophthalmology
https://www.readbyqxmd.com/read/28451987/erg-and-other-discriminators-between-advanced-hydroxychloroquine-retinopathy-and-retinitis-pigmentosa
#3
Archana A Nair, Michael F Marmor
PURPOSE: To study whether the ERG and other clinical findings help to distinguish between advanced hydroxychloroquine (HCQ) retinopathy and pericentral or diffuse retinitis pigmentosa (RP) with similar fundus appearance. METHODS: We conducted a retrospective analysis of patients with advanced HCQ retinopathy (n = 11), pericentral RP (n = 8) and diffuse RP (n = 8). Pericentral RP was defined as having limited fundus damage and relatively normal flicker ERG time-to-peak...
April 27, 2017: Documenta Ophthalmologica. Advances in Ophthalmology
https://www.readbyqxmd.com/read/28421377/vep-and-perg-in-patients-with-multiple-sclerosis-with-and-without-a-history-of-optic-neuritis
#4
M Janáky, Á Jánossy, G Horváth, G Benedek, G Braunitzer
PURPOSE: Visual electrophysiology is routinely used to detect the visual complications of multiple sclerosis, but the analysis mostly focuses on visual evoked potential (VEP) and especially the P100 component. Our goal was to analyze the components and waveform alterations of VEPs and pattern electroretinograms (PERGs) in patients with multiple sclerosis (MS) with good vision. METHODS: The main VEP and PERG components of 85 patients with MS were analyzed in two groups: 38 patients who had optic neuritis in their history (ON group) and 47 patients who had never had optic neuritis (MS group)...
April 18, 2017: Documenta Ophthalmologica. Advances in Ophthalmology
https://www.readbyqxmd.com/read/28389912/pigmented-and-albino-rats-differ-in-their-responses-to-moderate-acute-and-reversible-intraocular-pressure-elevation
#5
Akshay Gurdita, Bingyao Tan, Karen M Joos, Kostadinka Bizheva, Vivian Choh
PURPOSE: To compare the electrophysiological and morphological responses to acute, moderately elevated intraocular pressure (IOP) in Sprague-Dawley (SD), Long-Evans (LE) and Brown Norway (BN) rat eyes. METHODS: Eleven-week-old SD (n = 5), LE (n = 5) and BN (n = 5) rats were used. Scotopic threshold responses (STRs), Maxwellian flash electroretinograms (ERGs) or ultrahigh-resolution optical coherence tomography (UHR-OCT) images of the rat retinas were collected from both eyes before, during and after IOP elevation of one eye...
April 7, 2017: Documenta Ophthalmologica. Advances in Ophthalmology
https://www.readbyqxmd.com/read/28382556/acute-progressive-paravascular-placoid-neuroretinopathy-with-negative-type-electroretinography-in-paraneoplastic-retinopathy
#6
Fred K Chen, Avenell L Chew, Dan Zhang, Shang-Chih Chen, Enid Chelva, Erandi Chandrasekera, Eleanor M H Koay, John Forrester, Samuel McLenachan
PURPOSE: Paraneoplastic retinopathy can be the first manifestation of systemic malignancy. A subset of paraneoplastic retinopathy is characterized by negative-type electroretinography (ERG) without fundus abnormality. Here we describe the multimodal imaging and clinico-pathological correlation of a unique case of acute progressive paravascular placoid neuroretinopathy with suspected retinal depolarizing bipolar cell dysfunction preceding the diagnosis of metastatic small cell carcinoma of the prostate...
April 5, 2017: Documenta Ophthalmologica. Advances in Ophthalmology
https://www.readbyqxmd.com/read/28349282/detailed-electroretinographic-findings-in-rd8-mice
#7
Alan B Saul, Xuezhi Cui, Shanu Markand, Sylvia B Smith
PURPOSE: Previous work has suggested that the retinal degeneration mutant rd8 mouse lacks an electroretinographic (ERG) phenotype until about 9 months of age. We evaluated the ERG phenotype of these mice by measuring both conventional ERG responses and scotopic threshold responses. METHODS: Groups of 4-month-old wild-type (WT) and mutant (rd8) mice were anesthetized and tested for mass retinal responses (ERGs) to several types of visual stimuli. Scotopic threshold responses were accumulated with brief scotopic flashes at a series of very dim intensities...
March 27, 2017: Documenta Ophthalmologica. Advances in Ophthalmology
https://www.readbyqxmd.com/read/28332008/case-of-adult-onset-neuronal-intranuclear-hyaline-inclusion-disease-with-negative-electroretinogram
#8
Wataru Yamada, Akira Takekoshi, Kyoko Ishida, Kiyofumi Mochizuki, Jun Sone, Gen Sobue, Yuichi Hayashi, Takashi Inuzuka, Yozo Miyake
PURPOSE: To report the findings in a 72-year-old man with neuronal intranuclear hyaline inclusion disease (NIHID) with the negative-type electroretinogram (ERG) and without night blindness. METHODS: Standard ophthalmological examinations including the medical history, measurements of the best-corrected visual acuity and intraocular pressures, slit-lamp biomicroscopy, ophthalmoscopy, spectral-domain optical coherence tomography, fundus autofluorescence, and perimetry were performed...
March 22, 2017: Documenta Ophthalmologica. Advances in Ophthalmology
https://www.readbyqxmd.com/read/28315987/early-postoperative-evaluation-of-retinal-function-by-electroretinography-after-vitreous-surgery-for-idiopathic-epimacular-membrane
#9
Akira Watanabe, Tamaki Gekka, Kota Arai, K Kohzaki, Hiroshi Tsuneoka
PURPOSE: In this study, we used the PuREC to carry out electroretinography (ERG) measurements using skin electrodes to assess changes before and after microincision vitreous surgery (MIVS) for epiretinal membrane (ERM) and evaluate the stress on retinal function soon after MIVS. METHODS: The study subjects were 18 eyes of 18 patients who underwent MIVS for ERM simultaneously with cataract surgery. ERG measurements were performed using a skin electrode on the day before vitreous surgery, on the day after surgery, and 1 week later...
March 18, 2017: Documenta Ophthalmologica. Advances in Ophthalmology
https://www.readbyqxmd.com/read/28303363/test-retest-reliability-of-scotopic-full-field-electroretinograms-in-rabbits
#10
Jan Luebke, Alexandra Anton, Michael Bach
PURPOSE: To explore test-retest reliability of standard scotopic full-field ERG measurements in New Zealand White rabbits. The ERG is widely used for testing of retinal integrity after any ocular treatment. We here present detailed stimulus-response dependencies for single healthy and untreated animals, concentrating on test-retest reproducibility. MATERIALS AND METHODS: Five New Zealand White rabbits (aged 8-10 weeks, weight about 2.0-2.5 kg) underwent binocular ERG measurements after intramuscular anesthesia and pharmaceutical pupillary dilatation at a baseline day and 10 days later...
March 16, 2017: Documenta Ophthalmologica. Advances in Ophthalmology
https://www.readbyqxmd.com/read/28281105/erratum-to-iscev-standard-for-clinical-electro-oculography-2017-update
#11
Paul A Constable, Michael Bach, Laura J Frishman, Brett G Jeffrey, Anthony G Robson
No abstract text is available yet for this article.
March 9, 2017: Documenta Ophthalmologica. Advances in Ophthalmology
https://www.readbyqxmd.com/read/28281104/electroretinogram-and-visual-field-changes-in-a-case-of-birdshot-chorioretinopathy
#12
Hisham Elbaz, Volker Besgen, Klara Rechberger, Walter Sekundo, Eckart Apfelstedt-Sylla
PURPOSE: This case report explores the role of the visual field perimetry and electroretinogram (ERG) in cases of non-infectious uveitis in the assessment and monitoring of retinal function and response to treatment. METHODS: A 59-year-old Caucasian female presenting with bilateral posterior uveitis newly diagnosed as birdshot chorioretinopathy (BSCR) presenting with bilateral decrease in visual acuity and cystoid macular edema, as well as a paracentral scotoma in the right eye...
March 9, 2017: Documenta Ophthalmologica. Advances in Ophthalmology
https://www.readbyqxmd.com/read/28243926/comparing-three-different-modes-of-electroretinography-in-experimental-glaucoma-diagnostic-performance-and-correlation-to-structure
#13
Laura Wilsey, Sowjanya Gowrisankaran, Grant Cull, Christy Hardin, Claude F Burgoyne, Brad Fortune
PURPOSE: To compare diagnostic performance and structure-function correlations of multifocal electroretinogram (mfERG), full-field flash ERG (ff-ERG) photopic negative response (PhNR) and transient pattern-reversal ERG (PERG) in a non-human primate (NHP) model of experimental glaucoma (EG). METHODS: At baseline and after induction of chronic unilateral IOP elevation, 43 NHP had alternating weekly recordings of retinal nerve fiber layer thickness (RNFLT) by spectral domain OCT (Spectralis) and retinal function by mfERG (7F slow-sequence stimulus, VERIS), ff-ERG (red 0...
February 27, 2017: Documenta Ophthalmologica. Advances in Ophthalmology
https://www.readbyqxmd.com/read/28176172/evaluation-of-retinal-ganglion-cell-function-after-intraocular-pressure-reduction-measured-by-pattern-electroretinogram-in-patients-with-primary-open-angle-glaucoma
#14
Joanna Karaśkiewicz, Krzysztof Penkala, Maciej Mularczyk, Wojciech Lubiński
BACKGROUND: To evaluate retinal ganglion cell (RGC) function after intraocular pressure (IOP) reduction measured by pattern electroretinogram (PERG) in patients with newly diagnosed, non-treated preperimetric and early stages of primary open-angle glaucoma (POAG). METHODS: Twenty-four eyes from 24 patients with POAG: 11 eyes with preperimetric glaucoma and 13 eyes with early glaucoma received Ganfort (®) (bimatoprost + timolol) once a day for a period of 1 month...
April 2017: Documenta Ophthalmologica. Advances in Ophthalmology
https://www.readbyqxmd.com/read/28160194/constant-luminance-cd%C3%A2-s-m-2-versus-constant-retinal-illuminance-td%C3%A2-s-stimulation-in-flicker-ergs
#15
C Quentin Davis, Olga Kraszewska, Colette Manning
PURPOSE: To compare the effect of variable pupil size on the flicker electroretinogram (ERG) between a stimulus having constant luminance and a stimulus having constant retinal illuminance (constant Troland) that compensates for pupil size. METHODS: Subjects (n = 18) were tested with 12 pairs of the stimuli. The stimulus pair consisted of the ISCEV standard constant luminance stimulus (3 cd·s/m(2) with a 30 cd/m(2) background) and a constant retinal illuminance stimulus (32 Td·s with a 320 Td background) selected to provide the same stimulus and background when the pupil diameter is 3...
April 2017: Documenta Ophthalmologica. Advances in Ophthalmology
https://www.readbyqxmd.com/read/28224239/the-importance-of-electrode-position-in-visual-electrophysiology
#16
A Kurtenbach, S Kramer, T Strasser, E Zrenner, H Langrová
PURPOSE: The DTL fibre electrode is commonly used to record the electric potentials elicited by stimulation of the retina. Two positions are commonly used: it is placed either on the cornea along the lower lid or in the conjunctival fornix. The PERG and OPs have previously been examined and compared under both conditions. The aim of this study was to examine the ERG, flicker response and on-off responses with differing electrode positions. METHODS: Before recruitment, all subjects underwent an ophthalmological examination...
February 21, 2017: Documenta Ophthalmologica. Advances in Ophthalmology
https://www.readbyqxmd.com/read/28220265/similarities-and-differences-between-behavioral-and-electrophysiological-visual-acuity-thresholds-in-healthy-infants-during-the-second-half-of-the-first-year-of-life
#17
Claudia Polevoy, Gina Muckle, Jean R Séguin, Emmanuel Ouellet, Dave Saint-Amour
PURPOSE: Behavioral and electrophysiological methods for visual acuity estimation typically correlate well in children and adult populations, but this relationship remains unclear in infants, particularly during the second half of the first year of life. It has been suggested that the agreement between both methods mostly relies on age and/or subjective acuity factors. The present study aimed at comparing acuity thresholds obtained with both approaches in a sample of healthy infants in a relatively narrow age range, that is 6-10 months old...
February 20, 2017: Documenta Ophthalmologica. Advances in Ophthalmology
https://www.readbyqxmd.com/read/28197754/differences-in-ocular-findings-in-two-siblings-one-with-complete-and-other-with-incomplete-achromatopsia
#18
Shinji Ueno, Ayami Nakanishi, Akira Sayo, Taro Kominami, Yasuki Ito, Takaaki Hayashi, Kazushige Tsunoda, Takeshi Iwata, Hiroko Terasaki
PURPOSE: Patients with complete achromatopsia (ACHM) lack cone function, and patients with incomplete ACHM have relatively good visual acuity with residual color vision. The pathological mechanism(s) underlying incomplete ACHM has not been determined. The purpose of this study was to determine the pathophysiology of ACHM in two siblings: one with complete ACHM and the other with incomplete ACHM. METHODS: The medical charts of the two siblings were reviewed. RESULTS: The sibling with incomplete ACHM had decimal visual acuities that ranged from 0...
February 14, 2017: Documenta Ophthalmologica. Advances in Ophthalmology
https://www.readbyqxmd.com/read/28110380/iscev-standard-for-clinical-electro-oculography-2017-update
#19
Paul A Constable, Michael Bach, Laura J Frishman, Brett G Jeffrey, Anthony G Robson
The clinical electro-oculogram (EOG) is an electrophysiological test of the outer retina and retinal pigment epithelium (RPE) in which changes in the electrical potential across the RPE are recorded during successive periods of dark and light adaptation. This document presents the 2017 EOG Standard from the International Society for Clinical Electrophysiology of Vision (ISCEV: www.iscev.org ). This standard has been reorganized and updated to include an explanation of the mechanism of the EOG, but without substantive changes to the testing protocol from the previous version published in 2011...
February 2017: Documenta Ophthalmologica. Advances in Ophthalmology
https://www.readbyqxmd.com/read/28091887/the-morphology-of-human-rod-ergs-obtained-by-silent-substitution-stimulation
#20
J Maguire, N R A Parry, J Kremers, I J Murray, D McKeefry
PURPOSE: To record transient ERGs from the light-adapted human retina using silent substitution stimuli which selectively reflect the activity of rod photoreceptors. We aim to describe the morphology of these waveforms and examine how they are affected by the use of less selective stimuli and by retinal pathology. METHODS: Rod-isolating stimuli with square-wave temporal profiles (250/250 ms onset/offset) were presented using a 4 primary LED ganzfeld stimulator...
February 2017: Documenta Ophthalmologica. Advances in Ophthalmology
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