Abstract:
PURPOSE:This study compared the performance of a video-based infrared three-dimensional eye tracker device (Chronos) with the scleral search coil method. METHODS:Three-dimensional eye movements were measured simultaneously with both systems during fixation, saccades, optokinetic stimulation, and vestibular stimulation. RESULTS:Comparison of fixation positions between -15 degrees and +15 degrees showed that horizontal and vertical eye position signals of the two systems were highly correlated (R2 = 0.99). Torsion values measured by coils and the video system were significantly different (P < 0.001). Saccade main sequence parameters of coil and video signals were in good agreement. Gains of torsion in response to optokinetic stimulation (cycloversion and cyclovergence) were not significantly different (P > 0.05). Gain values of the vestibulo-ocular reflex as determined from coil and video signals showed good agreement for rotations. However, there was more variability in the video signals for translations, possibly due to relative motion between the head and cameras. CONCLUSIONS:Lower time resolution, possible instability of the head device of the video system, and inherent small instabilities of pupil tracking algorithms make the coil system the best choice when measuring eye movement responses with high precision or when involving high-frequency head motion. For less demanding and for static tests and measurements longer than a half an hour, the latest generation infrared video system is a good alternative to scleral search coils. However, the quality of torsion of the infrared video system is less compared with scleral search coils and needs further technological improvement.
journal_name
Invest Ophthalmol Vis Scijournal_title
Investigative ophthalmology & visual scienceauthors
Houben MM,Goumans J,van der Steen Jdoi
10.1167/iovs.05-0234keywords:
subject
Has Abstractpub_date
2006-01-01 00:00:00pages
179-87issue
1eissn
0146-0404issn
1552-5783pii
47/1/179journal_volume
47pub_type
杂志文章abstract:PURPOSE:Patients with typical clinical features of retinitis pigmentosa were found to have the atypical electroretinographic finding of a negative waveform to a bright flash in the dark-adapted state. The full-field electroretinogram (ERG) was studied in seven such patients to understand better the pathophysiology. ME...
journal_title:Investigative ophthalmology & visual science
pub_type: 杂志文章
doi:
更新日期:1993-11-01 00:00:00
abstract:PURPOSE:Growth factors act through high-affinity cell surface receptors expressed by target cells and are critical modulators of cell function. Because aqueous humor is known to contain growth factors, these molecules may play a key role in maintaining the normal function of the human trabecular meshwork (HTM). Alterna...
journal_title:Investigative ophthalmology & visual science
pub_type: 杂志文章
doi:
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abstract:PURPOSE:Previous studies have shown that adenosine induces relaxation of isolated retinal arterioles mediated by the A2A receptor, but the contributions to tone regulation of adenosine receptors located both in and around the vascular wall have not been studied in detail. METHODS:Porcine retinal arterioles with preser...
journal_title:Investigative ophthalmology & visual science
pub_type: 杂志文章
doi:10.1167/iovs.13-13428
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journal_title:Investigative ophthalmology & visual science
pub_type: 杂志文章
doi:10.1167/iovs.06-1434
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journal_title:Investigative ophthalmology & visual science
pub_type: 杂志文章
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journal_title:Investigative ophthalmology & visual science
pub_type: 杂志文章
doi:10.1167/iovs.12-11571
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journal_title:Investigative ophthalmology & visual science
pub_type: 杂志文章
doi:10.1167/iovs.06-1358
更新日期:2007-05-01 00:00:00
abstract:PURPOSE:To determine using the multifocal ERG technique whether there are any regional differences in the increase in the amplitude of cone electroretinograms (ERGs) during light adaptation. METHODS:Multifocal ERGs were recorded with the Visual Evoked Response Imaging System from five normal subjects. Thirty-seven hex...
journal_title:Investigative ophthalmology & visual science
pub_type: 杂志文章
doi:
更新日期:1999-10-01 00:00:00
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journal_title:Investigative ophthalmology & visual science
pub_type: 杂志文章
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journal_title:Investigative ophthalmology & visual science
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journal_title:Investigative ophthalmology & visual science
pub_type: 杂志文章
doi:
更新日期:2000-06-01 00:00:00
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journal_title:Investigative ophthalmology & visual science
pub_type: 杂志文章
doi:10.1167/iovs.04-0127
更新日期:2005-02-01 00:00:00
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journal_title:Investigative ophthalmology & visual science
pub_type: 杂志文章
doi:10.1167/iovs.15-16855
更新日期:2015-06-01 00:00:00
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journal_title:Investigative ophthalmology & visual science
pub_type: 杂志文章
doi:
更新日期:1993-06-01 00:00:00
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journal_title:Investigative ophthalmology & visual science
pub_type: 杂志文章
doi:
更新日期:1979-07-01 00:00:00
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journal_title:Investigative ophthalmology & visual science
pub_type: 杂志文章
doi:
更新日期:2000-04-01 00:00:00
abstract::Topical commercial phenylephrine HCl (Neo-Synephrine 10%) has been shown to cause an increase in corneal thickness and reversible vacuolization of corneal endothelial cells in rabbits. Using an in vivo model of regenerated corneal endothelial cells in the cat, we compared the cytotoxicity of phenylephrine-HCl 10% to r...
journal_title:Investigative ophthalmology & visual science
pub_type: 杂志文章
doi:
更新日期:1979-03-01 00:00:00
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journal_title:Investigative ophthalmology & visual science
pub_type: 杂志文章
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journal_title:Investigative ophthalmology & visual science
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doi:
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journal_title:Investigative ophthalmology & visual science
pub_type: 杂志文章
doi:
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journal_title:Investigative ophthalmology & visual science
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更新日期:2012-08-31 00:00:00
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journal_title:Investigative ophthalmology & visual science
pub_type: 杂志文章
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更新日期:2019-06-03 00:00:00
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journal_title:Investigative ophthalmology & visual science
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更新日期:2014-09-23 00:00:00
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journal_title:Investigative ophthalmology & visual science
pub_type: 杂志文章
doi:10.1167/iovs.04-1464
更新日期:2005-06-01 00:00:00
abstract:PURPOSE:To determine the role of IL-33 in resistance to Pseudomonas aeruginosa keratitis. METHODS:Corneal IL-33 mRNA and protein levels were tested in susceptible C57BL/6 (B6) and resistant BALB/c mice. B6 mice were injected with recombinant mouse IL-33 (rmIL-33) and disease severity, bacterial load, polymorphonuclear...
journal_title:Investigative ophthalmology & visual science
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doi:10.1167/iovs.09-3983
更新日期:2010-03-01 00:00:00
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journal_title:Investigative ophthalmology & visual science
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journal_title:Investigative ophthalmology & visual science
pub_type: 杂志文章
doi:
更新日期:1996-03-01 00:00:00
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