TY - GEN
T1 - Helmholtzian Strategy to Stay in Focus with Binocular Vision
AU - Ruths, Justin
AU - Ghosh, Bijoy K.
N1 - Publisher Copyright:
© 2018 European Control Association (EUCA).
PY - 2018/11/27
Y1 - 2018/11/27
N2 - We study problems that can be applied to controlling the rotational motion of a pair of human eyes. Eyes move to acquire a point target and the control task is to direct the eye-pair towards the general target direction and, if the target is close by, to focus on the target. Roughly speaking, the former task is accomplished by versional eye movements and the latter task of pinpointing the eyes on a specific point is accomplished by vergence eye movements. We assume that the versional movement rotates the eye-pair identically whereas the vergence movements are specific to each eye with the goal of focusing. Although it is commonly believed and evidenced by collected data that 'versional eye movements satisfy Listing's Law', we show in this paper that Listing's eye movements do not maintain focus. Perhaps surprisingly, we show that if the eye controller maintains a Donders' surface originally proposed by Helmholtz, eye movements away from points on the Transverse Plane maintains focus. For points above or below the Transverse Plane, we show by simulation that rotations satisfying the Helmholtz condition maintain focus as well. Recorded data from human eye movement satisfying Listing's law supports the observation presented here.
AB - We study problems that can be applied to controlling the rotational motion of a pair of human eyes. Eyes move to acquire a point target and the control task is to direct the eye-pair towards the general target direction and, if the target is close by, to focus on the target. Roughly speaking, the former task is accomplished by versional eye movements and the latter task of pinpointing the eyes on a specific point is accomplished by vergence eye movements. We assume that the versional movement rotates the eye-pair identically whereas the vergence movements are specific to each eye with the goal of focusing. Although it is commonly believed and evidenced by collected data that 'versional eye movements satisfy Listing's Law', we show in this paper that Listing's eye movements do not maintain focus. Perhaps surprisingly, we show that if the eye controller maintains a Donders' surface originally proposed by Helmholtz, eye movements away from points on the Transverse Plane maintains focus. For points above or below the Transverse Plane, we show by simulation that rotations satisfying the Helmholtz condition maintain focus as well. Recorded data from human eye movement satisfying Listing's law supports the observation presented here.
UR - http://www.scopus.com/inward/record.url?scp=85059806221&partnerID=8YFLogxK
U2 - 10.23919/ECC.2018.8550144
DO - 10.23919/ECC.2018.8550144
M3 - Conference contribution
AN - SCOPUS:85059806221
T3 - 2018 European Control Conference, ECC 2018
SP - 2380
EP - 2386
BT - 2018 European Control Conference, ECC 2018
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 16th European Control Conference, ECC 2018
Y2 - 12 June 2018 through 15 June 2018
ER -