The interpretation of results of 10-2 visual fields should consider individual variability in the position of the optic disc and temporal raphe

2017 ◽  
Vol 102 (3) ◽  
pp. 323-328 ◽  
Author(s):  
Fumi Tanabe ◽  
Chota Matsumoto ◽  
Allison M McKendrick ◽  
Sachiko Okuyama ◽  
Shigeki Hashimoto ◽  
...  
Keyword(s):  
Visual Field ◽  
Optic Disc ◽  
Test Pattern ◽  
Visual Fields ◽  
Individual Variability ◽  
Structure And Function ◽  
En Face ◽  
Test Points ◽  
And Function ◽  
Oct Image

AimsTo clarify the anatomical relation between the optic disc and temporal raphe and to examine how these are related to test points in the 10-2 visual field test pattern.Subjects and methodsFor 22 eyes of volunteers with normal vision (+0.75 D spherical equivalent 7.88 D), a volume scan was used to obtain en-face images from a plane fitted to the inner limiting membrane using optical coherence tomography (OCT). The clearest en-face retinal nerve fibre (RNF) image was chosen for each subject and superimposed on fundus photographs using blood vessels for alignment. Individual landmarks (disc, fovea and visual field blind spot) were then used to superimpose the Humphrey Field Analyzer 10-2 visual field on the OCT image to compare with the RNF image.ResultsThe average disc–fovea–raphe angle was 169.4°±3.2°. Both the disc and temporal raphe were located above the horizontal midline (ie, were inferior in visual field space). For the 10-2 test pattern superimposed on the OCT image, in 54.5% of eyes, the temporal inferior test points adjacent to the horizontal midline mapped to the anatomical inferior hemifield. In 22.7% of eyes, nasal inferior test points adjacent to the horizontal midline mapped to the anatomical inferior hemifield. This mapping is opposite to typically assumed.ConclusionThe position of the disc and raphe affects the mapping between structure and function with respect to superior and inferior hemifields. Individual differences in the position of the temporal raphe should be considered when mapping between structure and function for the 10-2 test pattern.

scholarly journals Custom extraction of macular ganglion cell-inner plexiform layer thickness more precisely co-localizes structural measurements with visual fields test grids

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Janelle Tong ◽  
David Alonso-Caneiro ◽  
Nayuta Yoshioka ◽  
Michael Kalloniatis ◽  
Barbara Zangerl
Keyword(s):  
Ganglion Cell ◽  
Optic Disc ◽  
Visual Fields ◽  
Plexiform Layer ◽  
Inner Plexiform Layer ◽  
Spatial Direction ◽  
Healthy Cohort ◽  
Foveal Center ◽  
And Function ◽  
Thickness Measurements

Abstract We aimed to evaluate methods of extracting optical coherence tomography (OCT)-derived macular ganglion cell-inner plexiform layer (GCIPL) thickness measurements over retinal locations corresponding to standard visual field (VF) test grids. A custom algorithm was developed to automatically extract GCIPL thickness measurements from locations corresponding to Humphrey Field Analyser 10-2 and 30-2 test grids over Goldmann II, III and V stimulus sizes from a healthy cohort of 478 participants. Differences between GCIPL thickness measurements based on VF test grids (VF-based paradigms) and the 8 × 8 grid, as per instrument review software, were analyzed, as were impacts of fovea to optic disc tilt and areas over which GCIPL thickness measurements were extracted. Significant differences between the VF-based paradigms and the 8 × 8 grid were observed at up to 55% of locations across the macula, with the greatest deviations at the fovea (median 25.5 μm, 95% CI 25.24–25.72 μm, P < .0001). While significant correlations with fovea to optic disc tilt were noted at up to 33% of locations distributed 6°–8° from the foveal center, there were no marked differences in GCIPL thickness measurements between VF-based paradigms using different stimulus sizes. As such, standard high-density OCT measurement paradigms do not adequately reflect GCIPL measurements at retinal locations tested with standard VF patterns, with the central macular region contributing most to the observed differences and with further correction required for fovea to optic disc tilt. Spatial direction of GCIPL thickness measurements will improve future comparisons of structure and function, thereby improving methods designed to detect pathology affecting the inner retina.

scholarly journals Bilateral Glaucomatous Optic Neuropathy Caused by Eye Rubbing

2015 ◽  
Vol 6 (3) ◽  
pp. 279-283 ◽  
Author(s):  
Alfonso Savastano ◽  
Maria Cristina Savastano ◽  
Laura Carlomusto ◽  
Silvio Savastano
Keyword(s):  
Intraocular Pressure ◽  
Visual Field ◽  
Optic Disc ◽  
Optic Neuropathy ◽  
Correct Diagnosis ◽  
Visual Fields ◽  
Pattern Electroretinogram ◽  
Glaucomatous Optic Neuropathy ◽  
Fiber Layer ◽  
The Right

In this report, we describe a particular condition of a 52-year-old man who showed advanced bilateral glaucomatous-like optic disc damage, even though the intraocular pressure resulted normal during all examinations performed. Visual field test, steady-state pattern electroretinogram, retinal nerve fiber layer and retinal tomographic evaluations were performed to evaluate the optic disc damage. Over a 4-year observational period, his visual acuity decreased to 12/20 in the right eye and counting fingers in the left eye. Visual fields were severely compromised, and intraocular pressure values were not superior to 14 mm Hg during routine examinations. An accurate anamnesis and the suspicion of this disease represent a crucial aspect to establish the correct diagnosis. In fact, our patient strongly rubbed his eyes for more than 10 h per day. Recurrent and continuous eye rubbing can induce progressive optic neuropathy, causing severe visual field damage similar to the pathology of advanced glaucoma.

Towards multi-center glaucoma OCT image screening with semi-supervised joint structure and function multi-task learning

2020 ◽  
Vol 63 ◽  
pp. 101695
Author(s):  
Xi Wang ◽  
Hao Chen ◽  
An-Ran Ran ◽  
Luyang Luo ◽  
Poemen P. Chan ◽  
...  
Keyword(s):  
Structure And Function ◽  
Joint Structure ◽  
Task Learning ◽  
And Function ◽  
Oct Image

The Lateralizer: a tool for students to explore the divided brain

2012 ◽  
Vol 36 (3) ◽  
pp. 220-225 ◽  
Author(s):  
Benjamin A. Motz ◽  
Karin H. James ◽  
Thomas A. Busey
Keyword(s):  
Visual Field ◽  
Undergraduate Students ◽  
Visual Fields ◽  
Cerebral Hemispheres ◽  
Brain Anatomy ◽  
Skill Sets ◽  
Divided Visual Field ◽  
Field Technique ◽  
Left And Right ◽  
And Function

Despite a profusion of popular misinformation about the left brain and right brain, there are functional differences between the left and right cerebral hemispheres in humans. Evidence from split-brain patients, individuals with unilateral brain damage, and neuroimaging studies suggest that each hemisphere may be specialized for certain cognitive processes. One way to easily explore these hemispheric asymmetries is with the divided visual field technique, where visual stimuli are presented on either the left or right side of the visual field and task performance is compared between these two conditions; any behavioral differences between the left and right visual fields may be interpreted as evidence for functional asymmetries between the left and right cerebral hemispheres. We developed a simple software package that implements the divided visual field technique, called the Lateralizer, and introduced this experimental approach as a problem-based learning module in a lower-division research methods course. Second-year undergraduate students used the Lateralizer to experimentally challenge and explore theories of the differences between the left and right cerebral hemispheres. Measured learning outcomes after active exploration with the Lateralizer, including new knowledge of brain anatomy and connectivity, were on par with those observed in an upper-division lecture course. Moreover, the project added to the students' research skill sets and seemed to foster an appreciation of the link between brain anatomy and function.

Structure and function evaluation (SAFE): II. comparison of optic disk and visual field characteristics

2003 ◽  
Vol 135 (2) ◽  
pp. 148-154 ◽  
Author(s):  
Chris A Johnson ◽  
Pamela A Sample, PhD ◽  
Linda M Zangwill ◽  
Cristiana G Vasile ◽  
George A Cioffi ◽  
...  
Keyword(s):  
Visual Field ◽  
Structure And Function ◽  
Optic Disk ◽  
Function Evaluation ◽  
And Function

scholarly journals Pola Dasar Penggunaan Brand Dari masa ke Masa

Artika ◽  
2015 ◽  
Vol 1 (1) ◽  
pp. 22-28
Author(s):  
Angga Hendrawan
Keyword(s):  
Visual Field ◽  
Structure And Function ◽  
Transformation Function ◽  
Basic Pattern ◽  
Current Pattern ◽  
Usage Patterns ◽  
The Times ◽  
And Function

The problem in this study is the number of practitioners who consider branding as a job in the visual field. The purpose of this study was to identify the structure and function of the brand from time to time, so it can look a basic pattern that always exists in every development. This study uses literature by studying scientific sources. Developments brandditemukan usage patterns starting in 2250SM to the current pattern of development in the conventional use of a brand starts to become a strategic device, which is able to influence the development activities bisnis.Seiring with the times, the brand experienced a transformation function that directs a business to remain competitive to cope with change times.

Structure and Function in Glaucoma: The Relationship between a Functional Visual Field Map and an Anatomic Retinal Map

2006 ◽  
Vol 47 (12) ◽  
pp. 5356 ◽  
Author(s):  
Nicholas G. Strouthidis ◽  
Veronica Vinciotti ◽  
Allan J. Tucker ◽  
Stuart K. Gardiner ◽  
David P. Crabb ◽  
...  
Keyword(s):  
Visual Field ◽  
Structure And Function ◽  
And Function ◽  
The Relationship
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