scholarly journals Avoiding mask-related artefacts in visual field tests during the COVID-19 pandemic

2021 ◽  
pp. bjophthalmol-2020-318408
Author(s):  
Marta Gómez Mariscal ◽  
Francisco José Muñoz-Negrete ◽  
Pablo Vicente Muñoz-Ramón ◽  
Victor Aguado Casanova ◽  
Laia Jaumandreu ◽  
...  
Keyword(s):  
Visual Field ◽  
Field Tests ◽  
Face Mask ◽  
Similar Rate ◽  
Rank Test ◽  
Adhesive Tape ◽  
Test Duration ◽  
Reliability Indices ◽  
Surgical Masks ◽  
Superior Border

AimsTo assess visual field (VF) pseudoprogression related to face mask use.MethodsWe reviewed a total of 307 VFs performed with a face mask (FPP2/KN95 or surgical masks) and compared them with prior VFs, performed before the pandemic. VFs with suspected pseudoprogression due to mask artefacts (VF test 1) were repeated with a surgical mask and an adhesive tape on its superior border (VF test 2) to distinguish from true VF loss. Several parameters including reliability indices, test duration, VF index (VFI), mean defect (MD) and pattern deviation probability plots were compared among last pre-COVID VFs, VF tests 1 and VF tests 2, using the Wilcoxon signed-rank test.ResultsWe identified 18 VFs with suspected progression artefact due to masks (5.8%). In all of them, the median VFI and MD significantly improved after fitting the superior border of the mask, showing no significant differences with pre-COVID tests. The median fixation losses were significantly higher when wearing the unfitted mask (13% vs 6%,p=0.047). The inferior hemifield was the most affected, either as a new scotoma or as an enlargement of a prior defect.ConclusionUnfitted masks can simulate VF progression in around 6% of cases, mainly in the inferior hemifield, and increase significantly the rate of fixation losses. A similar rate of artefacts was observed using FPP2/KN95 or surgical masks. The use of a surgical mask with an adhesive tape covering the superior border may reduce mask-related artefacts, although concomitant progression cannot be ruled out in all cases.

Analysis of Reliability Indices from Humphrey Visual Field Tests in an Urban Glaucoma Population

Ophthalmology ◽  
1997 ◽  
Vol 104 (7) ◽  
pp. 1126-1130 ◽  
Author(s):  
Catherine M. Birt ◽  
Dong H. Shin ◽  
Vara Samudrala ◽  
Brett A. Hughes ◽  
Chaesik Kim ◽  
...  
Keyword(s):  
Visual Field ◽  
Field Tests ◽  
Reliability Indices ◽  
Humphrey Visual Field

scholarly journals Increasing the Spatial Resolution of Visual Field Tests Without Increasing Test Duration: An Evaluation of ARREST

2020 ◽  
Vol 9 (13) ◽  
pp. 24
Author(s):  
Vasanth Muthusamy ◽  
Andrew Turpin ◽  
Mark J. Walland ◽  
Bao N. Nguyen ◽  
Allison M. McKendrick
Keyword(s):  
Visual Field ◽  
Spatial Resolution ◽  
Field Tests ◽  
Test Duration

scholarly journals Reliability of Visual Field testing and its learning curve among children

QJM ◽  
2020 ◽  
Vol 113 (Supplement_1) ◽  
Author(s):  
S N N Abdelmalek ◽  
S Z Mansour ◽  
M M S Roshdy ◽  
A M A Elsawy
Keyword(s):  
Visual Field ◽  
Learning Curve ◽  
False Negative ◽  
Field Testing ◽  
Test Duration ◽  
Visual Field Testing ◽  
University Hospitals ◽  
Reliability Indices ◽  
Reliability Parameters ◽  
The Mean

Abstract Background Vision is a combination of distinct measurable functions including visual acuity, visual field and others. The visual field includes the area of space seen when the individual’s gaze is directed at any central object. Objective The aim of work in our study was to detect the learning curve of visual field testing in a young age group. Methods This study included 72 eyes of 36 children from both sexes aging from 6 to 12 years. All children were from Ain-shams university hospitals outpatient clinics. A detailed questionnaire was answered by both the care-giver and the child on the time spent playing video-games in terms of days per week and hours per day and children were categorized accordingly into VGP and NVGP. Children are devided according to Green and Bavelier’s criteria for VGP participants. The visual field testing was performed twice with a 7-day interval apart and the results of the first session were compared with those of the second. Learning effect was defined as an improvement at results for duration and perimetric reliability indices. Results Mean age of participant children was 8.94 ±1.90. Mean reliability parameters were: 68.25 ± 25.78% of fixation losses in the first perimetric test and 71.02 ± 30.84% in the second, 39.14 ± 28.27% of false positive errors in the first test and 44.01 ± 31.24 in the second, 9.67 ± 5.97% of false negative errors in the first test and 9.22 ± 7.74 in the second. The mean test duration was 6.91 ± 1.78 in the first test and 6.58 ± 1.33 in the second. Conclusion There was remarkable enhancement in the time taken to complete the second perimetric test in VGP with respect to NVGP indicating a better learning curve.

scholarly journals Granulomatosis with Polyangiitis Presenting with Bilateral Orbital Apex Syndrome

2021 ◽  
pp. 32-40
Author(s):  
Yusuke Murai ◽  
Takuji Kurimoto ◽  
Sotaro Mori ◽  
Kaori Ueda ◽  
Mari Sakamoto ◽  
...  
Keyword(s):  
Visual Field ◽  
Eye Movement ◽  
Endoscopic Sinus Surgery ◽  
Granulomatosis With Polyangiitis ◽  
Field Tests ◽  
Sinus Surgery ◽  
Orbital Apex ◽  
Orbital Apex Syndrome ◽  
Initial Examination ◽  
Steroid Pulse

We report a rare case of granulomatosis with polyangiitis (GPA) presenting with bilateral orbital apex syndrome (OAS). A 73-year-old woman with a history of endoscopic sinus surgery for ethmoidal sinusitis experienced a sudden decrease in visual acuity (VA) of both eyes. At the initial examination, her VA had decreased to 0.01 in the right eye and 0.03 in the left eye, and eye movement in both eyes was mildly limited in all directions. Visual field tests of both eyes showed a large central scotoma. Laboratory tests revealed an elevation of myeloperoxidase-anti-neutrophil cytoplasmic antibody. Facial computed tomography demonstrated a thickened mucosal membrane in the entire ethmoidal sinus, and the posterosuperior walls of Onodi cells filled with infiltrative lesions had thinned. Orbital magnetic resonance imaging showed severe inflammation in the orbital apex. From these clinical findings, the patient was diagnosed with GPA presenting with OAS associated with ethmoid sinusitis. Emergent endoscopic sinus surgery was performed for biopsy and debridement of the ethmoidal and sphenoid sinusitis to decompress the optic nerve. One day after endoscopic sinus surgery, the patient’s VA and visual field were improved, and steroid pulse therapy was commenced postoperatively. Four days later, VA had recovered to 1.0 in both eyes, and eye movement and visual field had were improved. Although OAS is a rare manifestation, early surgical treatment should be considered when the orbital lesion presents as risk of rapid deterioration of visual function in patients with GPA.

scholarly journals Concentric division of 10° visual field tests in retinitis pigmentosa

2013 ◽  
Vol 57 (3) ◽  
pp. 268-274 ◽  
Author(s):  
Ken Ogino ◽  
Atsushi Otani ◽  
Akio Oishi ◽  
Masafumi Kurimoto ◽  
Takuro Sekiya ◽  
...  
Keyword(s):  
Visual Field ◽  
Retinitis Pigmentosa ◽  
Field Tests

Comparing the usefulness of a new algorithm to measure visual field using the variational Bayes linear regression in glaucoma patients, in comparison to the Swedish interactive thresholding algorithm

2021 ◽  
pp. bjophthalmol-2020-318304
Author(s):  
Hiroshi Murata ◽  
Ryo Asaoka ◽  
Yuri Fujino ◽  
Masato Matsuura ◽  
Kazunori Hirasawa ◽  
...  
Keyword(s):  
Visual Field ◽  
Linear Regression ◽  
Open Angle Glaucoma ◽  
Variational Bayes ◽  
Mean Deviation ◽  
Test Duration ◽  
Field Analyser ◽  
Measurement Duration ◽  
Measurement Algorithm ◽  
Thresholding Algorithm

Background/aimsWe previously reported that the visual field (VF) prediction model using the variational Bayes linear regression (VBLR) is useful for accurately predicting VF progression in glaucoma (Invest Ophthalmol Vis Sci. 2014, 2018). We constructed a VF measurement algorithm using VBLR, and the purpose of this study was to investigate its usefulness.Method122 eyes of 73 patients with open-angle glaucoma were included in the current study. VF measurement was performed using the currently proposed VBLR programme with AP-7700 perimetry (KOWA). VF measurements were also conducted using the Swedish interactive thresholding algorithm (SITA) standard programme with Humphrey field analyser. VF measurements were performed using the 24–2 test grid. Visual sensitivities, test–retest reproducibility and measurement duration were compared between the two algorithms.ResultMean mean deviation (MD) values with SITA standard were −7.9 and −8.7 dB (first and second measurements), whereas those with VBLR-VF were −8.2 and −8.0 dB, respectively. There were no significant differences across these values. The correlation coefficient of MD values between the 2 algorithms was 0.97 or 0.98. Test–retest reproducibility did not differ between the two algorithms. Mean measurement duration with SITA standard was 6 min and 02 s or 6 min and 00 s (first or second measurement), whereas a significantly shorter duration was associated with VBLR-VF (5 min and 23 s or 5 min and 30 s).ConclusionVBLR-VF reduced test duration while maintaining the same accuracy as the SITA-standard.

scholarly journals Arteriovenous Passage Times and Visual Field Progression in Normal Tension Glaucoma

2013 ◽  
Vol 2013 ◽  
pp. 1-6 ◽  
Author(s):  
Eva Charlotte Koch ◽  
Kay Oliver Arend ◽  
Marion Bienert ◽  
Andreas Remky ◽  
Niklas Plange
Keyword(s):  
Visual Field ◽  
Field Tests ◽  
Normal Tension Glaucoma ◽  
Retinal Blood Flow ◽  
Visual Field Progression ◽  
Confocal Scanning Laser Ophthalmoscope ◽  
Confocal Scanning ◽  
Confocal Scanning Laser ◽  
Passage Times

Purpose. Fluorescein angiographic studies revealed prolonged arteriovenous passage (AVP) times and increased fluorescein filling defects in normal tension glaucoma (NTG) compared to healthy controls. The purpose of this study was to correlate baseline AVP and fluorescein filling defects with visual field progression in patients with NTG.Patients and Methods. Patients with a follow-up period of at least 3 years and at least 4 visual field examinations were included in this retrospective study. Fluorescein angiography was performed at baseline using a confocal scanning laser ophthalmoscope (SLO, Rodenstock Instr.); fluorescein filling defects and AVP were measured by digital image analysis and dye dilution curves (25 Hz). Visual field progression was evaluated using regression analysis of the MD (Humphrey-Zeiss, SITA-24-2, MD progression per year (dB/year)). 72 patients with NTG were included, 44 patients in study 1 (fluorescein filling defects) and 28 patients in study 2 (AVP).Results. In study 1 (mean follow-up years, visual field tests), MD progression per year ( dB/year) was significantly correlated to the age (, ) but not to fluorescein filling defects, IOP, or MD at baseline. In study 2 (mean follow-up years, visual field tests), MD progression per year ( dB/year) was significantly correlated to AVP (, ) but not to age, IOP, or MD at baseline.Conclusion. Longer AVP times at baseline are correlated to visual field progression in NTG. Impaired retinal blood flow seems to be an important factor for glaucoma progression.

Charles Bonnet syndrome as first manifestation of occipital infarction

2022 ◽  
pp. 112067212110697
Author(s):  
Marta Isabel Martínez-Sánchez ◽  
Gema Bolívar
Keyword(s):  
Visual Acuity ◽  
Visual Field ◽  
Field Tests ◽  
Visual Field Loss ◽  
Visual Hallucinations ◽  
Correct Treatment ◽  
Cerebral Magnetic Resonance Imaging ◽  
Full Field ◽  
Charles Bonnet Syndrome ◽  
The Right

Purpose To describe a case of Charles Bonnet syndrome as the first manifestation of occipital infarction in a patient with preserved visual acuity. Observations We report a 78-year-old man followed in our department with a two-month-long history of visual hallucinations based on the vision of flowers and fruits intermittently, being perceived as unreal images. Best-corrected visual acuity was stable in the follow-up time being 20/20 in the right eye and 20/25 in the left eye. Extraocular muscle function testing, pupillary reflexes, biomicroscopy, fundus and optical coherence tomography examinations did not reveal any interesting findings. In order to rule out occipital pathology, orbital-cerebral magnetic resonance imaging was performed, showing an image compatible with the chronic ischemic right occipital lesion. The patient was diagnosed with Charles Bonnet syndrome secondary to occipital infarction and neurology decided that no treatment was required. 24-2 and 10-2 visual field tests showed no remarkable alterations and Full-field 120 point screening test showed nonspecific peripheral defects. Hallucinations improved over the months, being described as not annoying and increasingly infrequent. Conclusions and Importance Charles Bonnet syndrome is a condition characterized by the presence of recurrent and complex visual hallucinations in patients with visual pathway pathologic defects. Visual acuity or visual field loss is not a requirement for diagnosis. Charles Bonnet syndrome should be suspected in all patients with non-disturbing visual hallucinations, even though they present good visual acuteness. It will be essential to perform complementary explorations to identify the underlying pathology that allows the starting of a correct treatment option.

scholarly journals Visual Field Artifacts in Glaucoma With Face Mask Use During the COVID-19 Pandemic

2020 ◽  
Vol 29 (12) ◽  
pp. 1184-1188
Author(s):  
Nevin W. El-Nimri ◽  
Sasan Moghimi ◽  
Murray Fingeret ◽  
Robert N. Weinreb
Keyword(s):  
Visual Field ◽  
Face Mask
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