scholarly journals Is 20/20 vision good enough? Visual acuity differences within the normal range alter performance on contour grouping tasks

2014 ◽  
Vol 14 (10) ◽  
pp. 64-64
Author(s):  
D. Paterno ◽  
B. Keane ◽  
S. Kastner ◽  
S. Silverstein
Keyword(s):  
Visual Acuity ◽  
Normal Range ◽  
Contour Grouping

scholarly journals A Novel Method for the Localization and Management of Traumatic Cyclodialysis Cleft

2014 ◽  
Vol 2014 ◽  
pp. 1-5 ◽  
Author(s):  
Mingling Wang ◽  
Shufang Hu ◽  
Zhenquan Zhao ◽  
Tianlin Xiao
Keyword(s):  
Optical Coherence Tomography ◽  
Visual Acuity ◽  
Intraocular Pressure ◽  
Clinical Study ◽  
Ultrasound Biomicroscopy ◽  
Slit Lamp ◽  
Normal Range ◽  
Postoperative Visual Acuity ◽  
Novel Method ◽  
Cyclodialysis Cleft

Purpose.To propose a novel surgical method for the localization and management of traumatic cyclodialysis clefts.Methods.Five patients with traumatic cyclodialysis clefts who underwent the innovative surgery were retrospectively reviewed. The new method was introduced to repair a cyclodialysis cleft with two running sutures from the middle to each end of the cleft under the guidance of a probe. Preoperative and postoperative visual acuity (VA), intraocular pressure (IOP), slit lamp and gonioscopic results, ultrasound biomicroscopy (UBM), and optical coherence tomography (OCT) findings were recorded.Results.Cyclodialysis clefts were completely closed postoperatively in four patients (four eyes); this was confirmed by progressively improved VA, restoration into the normal range of the IOP, disappearance of suprachoroidal fluid, and reduced macular edema. Only one patient with multiple clefts had an incomplete reattachment.Conclusions.This clinical study offers a novel and efficient method to localize and repair the cyclodialysis clefts.

scholarly journals The effect of optic neuritis treatment trial (ONTT) combined corticosteroid regimen on pattern reversal visual evoked potentials: a prospective follow-up study

2021 ◽  
Vol 21 (1) ◽  
Author(s):  
Padmini Dahanayake ◽  
Tharaka L. Dassanayake ◽  
Manoji Pathirage ◽  
Saman Senanayake ◽  
Mike Sedgwick ◽  
...  
Keyword(s):  
Visual Acuity ◽  
Optic Neuritis ◽  
First Episode ◽  
Pattern Reversal ◽  
Treatment Trial ◽  
Normal Range ◽  
P100 Latency ◽  
Pre Treatment ◽  
Optic Neuritis Treatment Trial

Abstract Background The combined corticosteroid regimen of the original Optic Neuritis Treatment Trial (ONTT) is used in many centers to treat optic neuritis. Though pattern reversal visual evoked potentials (PRVEPs) are a sensitive, standard measure of visual conduction in optic neuritis, no studies hitherto have investigated the effect of combined ONTT regimen on PRVEPs. We aimed to determine the effect of combined corticosteroid regimen of the ONTT on changes of PRVEPs in patients with first-episode optic neuritis over 3 months post-treatment. Methods This is a prospective, observational study in which 44 patients with optic neuritis were seen pre-treatment (baseline) and follow-up, at 1 month (FU1) and 3 months (FU2). Twenty-nine patients were treated with ONTT combined regimen (ONTT+ Group) while 15 were conservatively managed without corticosteroids (ONTT- Group). The median latency and amplitude values of the P100 PRVEP component and the visual acuity (i.e. LogMAR values) at pre-treatment, FU1 and FU2 were compared in the two groups using Friedman’s rank test and Wilcoxon Signed Ranks test. Results Median P100 latency improved significantly (to the normal range) as early as by 1 month after the commencement of treatment in the ONTT+ Group, and then remained significantly lower than the baseline over next 2 months. In the ONTT- Group, the median P100 latency improved more slowly over the two follow up assessments and reached the normal range by 3 months. Median visual acuity values also improved significantly at 1 and 3 months after the commencement of treatment in the ONTT+ Group but not in the ONTT- Group. Conclusion ONTT combined corticosteroid regimen improves conduction in the visual pathways of patients with first-episode optic neuritis earlier than does conservative management. We provide electrodiagnostic evidence that combined ONTT regimen–compared with conservative management–results in early remission of visual conduction abnormalities in first-episode optic neuritis.

scholarly journals Evaluation of Plasma Assisted Noninvasive Surgery (PANIS) As a New Approach for the Treatment of Conjunctival Concretions: A Clinical Case Series

2021 ◽  
Vol 6 (12) ◽  
pp. 899-903
Author(s):  
Farhad Nejat ◽  
Khosrow Jadidi ◽  
Shima Eghtedari ◽  
Nazanin-Sadat Nabavi ◽  
Pooneh Malekifar
Keyword(s):  
Visual Acuity ◽  
Case Series ◽  
Refractive Errors ◽  
Normal Range ◽  
Ocular Surface Disease Index ◽  
New Approach ◽  
Noninvasive Surgery ◽  
Before And After ◽  
Straightforward Approach

Background and Objective: Plasma is one of the newest therapies recently used. This study aimed to evaluate a quick treatment modality of conjunctival concretions using plasma as a noninvasive procedure. Methods: Six eyes of six patients with conjunctival concretions were evaluated. The procedure was performed using plasma spots generated by the white handpiece of the Plexr device. The eyelid was everted and concretions sublimated by plasma spots from the upper and lower eyelids. Refractive Errors, visual acuity (BCVA and UCVA), Ocular Surface Disease Index (OSDI), and Intraocular pressure (IOP) were measured before and after six months of the procedure. Results: The results of 6 months follow-up show that this effective method had no recurrence or side effects. Treatment was effective in all of the patients. No complication and recurrence was observed. The OSDI score was improved to the normal range. This method had no effects on Refractive Errors, Visual Acuity, and IOP. Conclusion: Based on the results, it seems that the PANIS method can be used as a practical, quick, and straightforward approach for the treatment of conjunctival concretions.

scholarly journals Is 20/20 vision good enough? Visual acuity differences within the normal range predict contour element detection and integration

2014 ◽  
Vol 22 (1) ◽  
pp. 121-127 ◽  
Author(s):  
Brian P. Keane ◽  
Sabine Kastner ◽  
Danielle Paterno ◽  
Steven M. Silverstein
Keyword(s):  
Visual Acuity ◽  
Normal Range

scholarly journals Sensory Eye Dominance in Treated Anisometropic Amblyopia

2017 ◽  
Vol 2017 ◽  
pp. 1-7 ◽  
Author(s):  
Yao Chen ◽  
Jiafeng Wang ◽  
Hongmei Shi ◽  
Xiaoxiao Wang ◽  
Lixia Feng
Keyword(s):  
Visual Acuity ◽  
Critical Period ◽  
Visual Experience ◽  
Critical Role ◽  
Visual Development ◽  
Normal Range ◽  
Normal Visual Acuity ◽  
Eye Dominance ◽  
Phase Combination ◽  
Sensory Eye Dominance

Amblyopia results from inadequate visual experience during the critical period of visual development. Abnormal binocular interactions are believed to play a critical role in amblyopia. These binocular deficits can often be resolved, owing to the residual visual plasticity in amblyopes. In this study, we quantitatively measured the sensory eye dominance in treated anisometropic amblyopes to determine whether they had fully recovered. Fourteen treated anisometropic amblyopes with normal or corrected to normal visual acuity participated, and their sensory eye dominance was assessed by using a binocular phase combination paradigm. We found that the two eyes were unequal in binocular combination in most (11 out of 14) of our treated anisometropic amblyopes, but none of the controls. We concluded that the treated anisometropic amblyopes, even those with a normal range of visual acuity, exhibited abnormal binocular processing. Our results thus suggest that there is potential for improvement in treated anisometropic amblyopes that may further enhance their binocular visual functioning.

scholarly journals Visual acuity differences within the normal range strongly alter visual perception: A cautionary tale for studies of special populations

2015 ◽  
Vol 15 (12) ◽  
pp. 324
Author(s):  
Matthew Roche ◽  
Brian Keane ◽  
Sabine Kastner ◽  
Thomas Papathomas ◽  
Steven Silverstein
Keyword(s):  
Visual Acuity ◽  
Visual Perception ◽  
Special Populations ◽  
Cautionary Tale ◽  
Normal Range

scholarly journals Transient electroretinographic abnormalities that mimic those of KCNV2 retinopathy: a case report

2021 ◽  
Author(s):  
Chihiro Kaizuka ◽  
Takaaki Hayashi ◽  
Kei Mizobuchi ◽  
Masaomi Kubota ◽  
Shinji Ueno ◽  
...  
Keyword(s):  
Visual Acuity ◽  
Serum Potassium ◽  
Potassium Level ◽  
Serum Potassium Level ◽  
Stage Iv ◽  
Implicit Time ◽  
Normal Range ◽  
Full Field ◽  
Bright Flash ◽  
Flash Electroretinogram

Abstract Purpose The purpose of this report was to describe the case of a 68-year-old male patient with stage IV colon cancer who exhibited electroretinographic abnormalities that are similar to those of KCNV2 retinopathy. Methods The patient presenting with photophobia, reduced visual acuity, and poor general conditions, the onset of which occurred ten days before presentation, was examined using fundoscopy, full-field electroretinography, blood tests, and abdominal computed tomography. Results The patient’s decimal best-corrected visual acuity (BCVA) was 0.4 in each eye. Fundoscopy showed bull's eye-like maculopathy in both eyes. Electroretinographic findings were similar to the characteristic findings of KCNV2 retinopathy: Rod electroretinogram showed delayed and preserved b-wave amplitudes; bright-flash electroretinogram showed double troughs of a-waves; b/a ratios shown by bright-flash electroretinogram were higher than those shown by standard-flash electroretinogram; and both cone and 30-Hz flicker electroretinograms showed extinguished responses. His serum potassium level increased to 6.2 mmol/L (normal range 3.6–4.8 mmol/L) owing to hydronephrosis resulting from disseminated carcinoma. After performing an emergency surgery to treat this condition, the serum potassium level immediately decreased to a normal range. Eleven days after presentation, rod and standard/bright-flash electroretinography showed improvement in the implicit time of the rod b-waves and the a-waves. Unexpectedly, the responses recorded by cone and 30-Hz flicker electroretinography became normal. The symptoms and maculopathy disappeared, and his BCVA improved to 1.2. Conclusions The abnormal electroretinographic findings might be associated with the transient increase in serum potassium level.

Vestibular Function and Motion Sickness Susceptibility: Videonystagmographic Evidence From Oculomotor and Caloric Tests

2020 ◽  
Vol 29 (2) ◽  
pp. 188-198
Author(s):  
Cynthia G. Fowler ◽  
Margaret Dallapiazza ◽  
Kathleen Talbot Hadsell
Keyword(s):  
Phase Velocity ◽  
Motion Sickness ◽  
Repeated Measures ◽  
Short Form ◽  
Vestibular Function ◽  
Slow Phase ◽  
Test Results ◽  
Normal Range ◽  
Slow Phase Velocity ◽  
Caloric Tests

Purpose Motion sickness (MS) is a common condition that affects millions of individuals. Although the condition is common and can be debilitating, little research has focused on the vestibular function associated with susceptibility to MS. One causal theory of MS is an asymmetry of vestibular function within or between ears. The purposes of this study, therefore, were (a) to determine if the vestibular system (oculomotor and caloric tests) in videonystagmography (VNG) is associated with susceptibility to MS and (b) to determine if these tests support the theory of an asymmetry between ears associated with MS susceptibility. Method VNG was used to measure oculomotor and caloric responses. Fifty young adults were recruited; 50 completed the oculomotor tests, and 31 completed the four caloric irrigations. MS susceptibility was evaluated with the Motion Sickness Susceptibility Questionnaire–Short Form; in this study, percent susceptibility ranged from 0% to 100% in the participants. Participants were divided into three susceptibility groups (Low, Mid, and High). Repeated-measures analyses of variance and pairwise comparisons determined significance among the groups on the VNG test results. Results Oculomotor test results revealed no significant differences among the MS susceptibility groups. Caloric stimuli elicited responses that were correlated positively with susceptibility to MS. Slow-phase velocity was slowest in the Low MS group compared to the Mid and High groups. There was no significant asymmetry between ears in any of the groups. Conclusions MS susceptibility was significantly and positively correlated with caloric slow-phase velocity. Although asymmetries between ears are purported to be associated with MS, asymmetries were not evident. Susceptibility to MS may contribute to interindividual variability of caloric responses within the normal range.

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