Abstract
Purpose: To evaluate the stability of human binocular alignment under conditions of altered fixation and luminance. Methods: Horizontal binocular alignment in 8 healthy orthotropic subjects was measured using infrared video-oculography (VOG) under conditions of binocular fixation and luminance change. Each testing condition was preceded by a binocular fixation period in room light (475 lux) to define the baseline binocular alignment. Binocular alignment was then measured in darkness without fixation, in room light through a semitranslucent filter that precluded fixation, and in darkness with a distant fixational target. We used the signed rank test to determine statistically whether these experimental conditions induced significant binocular alignment change from each baseline binocular alignment. Results: The mean horizontal binocular alignment in the dark without fixation was similar to baseline binocular alignment (0.2° ± 2.8°; . P = 0.4). The mean horizontal binocular alignment without fixation in room light was also similar to baseline binocular alignment (-1.4° ± 1.6°; . P = 0.08). The mean horizontal binocular alignment in the dark when a fixational target was provided showed an exodrift compared to baseline alignment (2.3° ± 1.0°; . P = 0.0004). Conclusions: The human brain does not require visual input to maintain binocular alignment on a short-term basis. The resilience of binocular alignment probably reflects the presence of phoria adaptation.
| Original language | English (US) |
|---|---|
| Journal | Journal of AAPOS |
| DOIs | |
| State | Accepted/In press - Jan 21 2016 |
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ASJC Scopus subject areas
- Ophthalmology
- Pediatrics, Perinatology, and Child Health
Cite this
Stability of human binocular alignment in the dark and under conditions of nonfixation. / Jung, Jaeho; Klaehn, Lindsay; Brodsky, Michael C.
In: Journal of AAPOS, 21.01.2016.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Stability of human binocular alignment in the dark and under conditions of nonfixation
AU - Jung, Jaeho
AU - Klaehn, Lindsay
AU - Brodsky, Michael C
PY - 2016/1/21
Y1 - 2016/1/21
N2 - Purpose: To evaluate the stability of human binocular alignment under conditions of altered fixation and luminance. Methods: Horizontal binocular alignment in 8 healthy orthotropic subjects was measured using infrared video-oculography (VOG) under conditions of binocular fixation and luminance change. Each testing condition was preceded by a binocular fixation period in room light (475 lux) to define the baseline binocular alignment. Binocular alignment was then measured in darkness without fixation, in room light through a semitranslucent filter that precluded fixation, and in darkness with a distant fixational target. We used the signed rank test to determine statistically whether these experimental conditions induced significant binocular alignment change from each baseline binocular alignment. Results: The mean horizontal binocular alignment in the dark without fixation was similar to baseline binocular alignment (0.2° ± 2.8°; . P = 0.4). The mean horizontal binocular alignment without fixation in room light was also similar to baseline binocular alignment (-1.4° ± 1.6°; . P = 0.08). The mean horizontal binocular alignment in the dark when a fixational target was provided showed an exodrift compared to baseline alignment (2.3° ± 1.0°; . P = 0.0004). Conclusions: The human brain does not require visual input to maintain binocular alignment on a short-term basis. The resilience of binocular alignment probably reflects the presence of phoria adaptation.
AB - Purpose: To evaluate the stability of human binocular alignment under conditions of altered fixation and luminance. Methods: Horizontal binocular alignment in 8 healthy orthotropic subjects was measured using infrared video-oculography (VOG) under conditions of binocular fixation and luminance change. Each testing condition was preceded by a binocular fixation period in room light (475 lux) to define the baseline binocular alignment. Binocular alignment was then measured in darkness without fixation, in room light through a semitranslucent filter that precluded fixation, and in darkness with a distant fixational target. We used the signed rank test to determine statistically whether these experimental conditions induced significant binocular alignment change from each baseline binocular alignment. Results: The mean horizontal binocular alignment in the dark without fixation was similar to baseline binocular alignment (0.2° ± 2.8°; . P = 0.4). The mean horizontal binocular alignment without fixation in room light was also similar to baseline binocular alignment (-1.4° ± 1.6°; . P = 0.08). The mean horizontal binocular alignment in the dark when a fixational target was provided showed an exodrift compared to baseline alignment (2.3° ± 1.0°; . P = 0.0004). Conclusions: The human brain does not require visual input to maintain binocular alignment on a short-term basis. The resilience of binocular alignment probably reflects the presence of phoria adaptation.
UR - http://www.scopus.com/inward/record.url?scp=84978915390&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84978915390&partnerID=8YFLogxK
U2 - 10.1016/j.jaapos.2016.05.011
DO - 10.1016/j.jaapos.2016.05.011
M3 - Article
C2 - 27346855
AN - SCOPUS:84978915390
JO - Journal of AAPOS
JF - Journal of AAPOS
SN - 1091-8531
ER -