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2017 ; 7
(1
): 3435
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Dressmakers show enhanced stereoscopic vision
#MMPMID28611463
Chopin A
; Levi DM
; Bavelier D
Sci Rep
2017[Jun]; 7
(1
): 3435
PMID28611463
show ga
The ability to estimate the distance of objects from one's self and from each
other is fundamental to a variety of behaviours from grasping objects to
navigating. The main cue to distance, stereopsis, relies on the slight offsets
between the images derived from our left and right eyes, also termed disparities.
Here we ask whether the precision of stereopsis varies with professional
experience with precise manual tasks. We measured stereo-acuities of dressmakers
and non-dressmakers for both absolute and relative disparities. We used a
stereoscope and a computerized test removing monocular cues. We also measured
vergence noise and bias using the Nonius line technique. We demonstrate that
dressmakers' stereoscopic acuities are better than those of non-dressmakers, for
both absolute and relative disparities. In contrast, vergence noise and bias were
comparable in the two groups. Two non-exclusive mechanisms may be at the source
of the group difference we document: (i) self-selection or the fact that
stereo-vision is functionally important to become a dressmaker, and (ii)
plasticity, or the fact that training on demanding stereovision tasks improves
stereo-acuity.
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