Computerized color perimetry in multiple sclerosis

1998 ◽  
Vol 4 (2) ◽  
pp. 79-84 ◽  
Author(s):  
N Accornero ◽  
S Rinalduzzi ◽  
M Capozza ◽  
E Millefiorini ◽  
G C Filligoi ◽  
...  
Keyword(s):  
Visual Field ◽  
Statistical Difference ◽  
Cost Effective ◽  
Quantitative Information ◽  
Field Analysis ◽  
Visual Field Defects ◽  
Highly Sensitive ◽  
The Subject ◽  
Color Perimetry ◽  
Field Defects

Color visual field analysis has proven highly sensitive for early visual impairments diagnosis in MS, yet it has never attained widespread popularity usually because the procedure is difficult to standardize, the devices are costly, and the test is fatiguing. We propose a computerized procedure running on standard PC, cost effective, clonable, and easy handled. Two hundred and sixty-four colored patches subtending 18 angle of vision, with selected hues and low saturation levels are sequentially and randomly displayed on gray equiluminous background of the PC screen subtending 2486408 angle of vision. The subject is requested to press a switch at the perception of the stimulus. The output provides colored maps with quantitative information. Comparison between normals and a selected population of MS patients with no actual luminance visual field defects, showed high statistical difference.

scholarly journals Eye-tracking-based visual field analysis (EFA): a reliable and precise perimetric methodology for the assessment of visual field defects

2021 ◽  
Vol 6 (1) ◽  
pp. e000429
Author(s):  
Michael Christian Leitner ◽  
Florian Hutzler ◽  
Sarah Schuster ◽  
Lorenzo Vignali ◽  
Patrick Marvan ◽  
...  
Keyword(s):  
Eye Movements ◽  
Visual Field ◽  
Eye Tracking ◽  
Field Analysis ◽  
Visual Field Defects ◽  
Test Duration ◽  
Automated Perimetry ◽  
The Individual ◽  
The Right ◽  
Field Defects

ObjectiveSeveral studies report evidence for training-related neuroplasticity in the visual cortex, while other studies suggest that improvements simply reflect inadequate eye fixation control during perimetric prediagnostics and postdiagnostics.Methods and analysisTo improve diagnostics, a new eye-tracking-based methodology for visual field analysis (eye-tracking-based visual field analysis (EFA)) was developed. The EFA is based on static automated perimetry and additionally takes individual eye movements in real time into account and compensates for them. In the present study, an evaluation of the EFA with the help of blind spots of 58 healthy participants and the individual visual field defects of 23 clinical patients is provided. With the help of the EFA, optical coherence tomography, Goldmann perimetry and a Humphrey field analyser, these natural and acquired scotomas were diagnosed and the results were compared accordingly.ResultsThe EFA provides a SE of measurement of 0.38° for the right eye (OD) and 0.50° for the left eye (OS), leading to 0.44° of visual angle for both eyes (OU). Based on participants’ individual results, the EFA provides disattenuated correlation (validity) of 1.00 for both OD and OS. Results from patients suffering from cortical lesions and glaucoma further indicate that the EFA is capable of diagnosing acquired scotoma validly and is applicable for clinical use.ConclusionOutcomes indicate that the EFA is highly reliable and precise in diagnosing individual shape and location of scotoma and capable of recording changes of visual field defects (after intervention) with unprecedented precision. Test duration is comparable to established instruments and due to the high customisability of the EFA, assessment duration can be shortened by adapting the diagnostic procedure to the patients’ individual visual field characteristics. Therefore, the saccade-compensating methodology enables researchers and healthcare professionals to rule out eye movements as a source of inaccuracies in pre-, post-, and follow-up assessments.

scholarly journals Population receptive field analysis of the primary visual cortex complements perimetry in patients with homonymous visual field defects

2014 ◽  
Vol 111 (16) ◽  
pp. E1656-E1665 ◽  
Author(s):  
A. Papanikolaou ◽  
G. A. Keliris ◽  
T. D. Papageorgiou ◽  
Y. Shao ◽  
E. Krapp ◽  
...  
Keyword(s):  
Visual Cortex ◽  
Visual Field ◽  
Receptive Field ◽  
Primary Visual Cortex ◽  
Field Analysis ◽  
Visual Field Defects ◽  
Field Defects

Color Perimetry of Glaucomatous Visual Field Defects

Ophthalmology ◽  
1984 ◽  
Vol 91 (4) ◽  
pp. 338-346 ◽  
Author(s):  
William M. Hart ◽  
Mae O. Gordon
Keyword(s):  
Visual Field ◽  
Visual Field Defects ◽  
Color Perimetry ◽  
Field Defects

scholarly journals A longitudinal observation of a patient with normal tension glaucoma

2017 ◽  
Vol 76 (1) ◽  
Author(s):  
Hlupheka L. Sithole
Keyword(s):  
Intraocular Pressure ◽  
Visual Field ◽  
Normal Tension Glaucoma ◽  
Field Analysis ◽  
Visual Field Defects ◽  
Due Diligence ◽  
Longitudinal Observation ◽  
Eye Examination ◽  
Field Defects

Normal tension glaucoma (NTG) is a disease associated with normal intraocular pressure (10 mmHg – 21 mmHg) that may lead to irreversible blindness if misdiagnosed or left untreated over a period of time. The author observed a patient with NTG over a period of 5 years (from 2013 to 2017). The initial visual field analysis results (2014) showed mild visual field defects because of NTG at the start of the 5-year period. Although the patient was also diagnosed with hydrocephalus, a condition associated with optic nerve head damage, following years of noncompliance to treatment of NTG and follow-up eye examination schedules, the patient’s visual field defects were found to have progressed by the year 2017. It is therefore important for optometrists to apply due diligence when examining patients with NTG in order to expedite intervention and prevention of visual impairment and blindness.

Long-term stimulation of residual function in patients with visual field defects after post-chiasmatic lesions

2004 ◽  
Vol 31 (S 1) ◽  
Author(s):  
I Mueller ◽  
C Gall ◽  
E Kasten ◽  
BA Sabel
Keyword(s):  
Visual Field ◽  
Visual Field Defects ◽  
Residual Function ◽  
Field Defects ◽  
Stimulation Of

Automated Static Perimetry for diagnostics of visual field defects in glaucoma

2018 ◽  
Vol 78 (1) ◽  
pp. 65-71
Author(s):  
S. Slobodyanyk ◽  
Keyword(s):  
Visual Field ◽  
Visual Field Defects ◽  
Static Perimetry ◽  
Automated Static Perimetry ◽  
Field Defects

scholarly journals Central Visual Field Defects in Patients with Distinct Glaucomatous Optic Disc Phenotypes

2021 ◽  
Vol 223 ◽  
pp. 229-240
Author(s):  
Eren Ekici ◽  
Sasan Moghimi ◽  
Huiyuan Hou ◽  
James Proudfoot ◽  
Linda M. Zangwill ◽  
...  
Keyword(s):  
Visual Field ◽  
Optic Disc ◽  
Visual Field Defects ◽  
Central Visual Field ◽  
Field Defects

The relationship between intraocular pressure and visual field defects

1975 ◽  
Vol 20 (2) ◽  
pp. 182
Author(s):  
A.I. Friedmann
Keyword(s):  
Intraocular Pressure ◽  
Visual Field ◽  
Visual Field Defects ◽  
The Relationship ◽  
Field Defects

scholarly journals Multiple Temporal Lamina Cribrosa Defects in Myopic Eyes with Glaucoma and Their Association with Visual Field Defects

Ophthalmology ◽  
2017 ◽  
Vol 124 (11) ◽  
pp. 1600-1611 ◽  
Author(s):  
Yu Sawada ◽  
Makoto Araie ◽  
Makoto Ishikawa ◽  
Takeshi Yoshitomi
Keyword(s):  
Visual Field ◽  
Lamina Cribrosa ◽  
Visual Field Defects ◽  
Field Defects
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