10.5061/DRYAD.QF768
Li, Roger W.
University of California, Berkeley
So, Kayee
University of California, Berkeley
Wu, Thomas H.
University of California, Berkeley
Craven, Ashley P.
University of California, Berkeley
Tran, Truyet T.
University of California, Berkeley
Gustafson, Kevin M.
University of California, Berkeley
Levi, Dennis M.
University of California, Berkeley
Data from: Monocular blur alters the tuning characteristics of stereopsis
for spatial frequency and size
Dryad
dataset
2016
anisometropic amblyopia
optimal observer
stereoacuity
Visual acuity
coarse and fine stereopsis
2016-08-22T13:24:00Z
2016-08-22T13:24:00Z
en
https://doi.org/10.1098/rsos.160273
14921 bytes
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CC0 1.0 Universal (CC0 1.0) Public Domain Dedication
Our sense of depth perception is mediated by spatial filters at different
scales in the visual brain; low spatial frequency channels provide the
basis for coarse stereopsis, whereas high spatial frequency channels
provide for fine stereopsis. It is well established that monocular
blurring of vision results in decreased stereoacuity. However, previous
studies have used tests that are broadband in their spatial frequency
content. It is not yet entirely clear how the processing of stereopsis in
different spatial frequency channels is altered in response to binocular
input imbalance. Here, we applied a new stereoacuity test based on
narrow-band Gabor stimuli. By manipulating the carrier spatial frequency,
we were able to reveal the spatial frequency tuning of stereopsis,
spanning from coarse to fine, under blurred conditions. Our findings show
that increasing monocular blur elevates stereoacuity thresholds
‘selectively’ at high spatial frequencies, gradually shifting the optimum
frequency to lower spatial frequencies. Surprisingly, stereopsis for low
frequency targets was only mildly affected even with an acuity difference
of eight lines on a standard letter chart. Furthermore, we examined the
effect of monocular blur on the size tuning function of stereopsis. The
clinical implications of these findings are discussed.
Supplementary Materials - Raw Data