The resulting retinal image differences are basically in the realm
of degraded target edge contours. That image blur and, to some extent,
the nature of the blur, is being detected and utilized in control
of the eye’s axial length, is an implication in many current studies
in myopia. But what is in play here is something else: distinguishing
subtle contour differences in blurred targets. To satisfy the
inescapable precondition of learning, it would have to be presumed
that they were present all along but needed many presentations
with error identification to learn to be recognized. Though the differences
in degradation would, of course, have to have been encoded
in differences in retinal ganglion cell discharges, the
apparatus for detecting the subtle differences and that might be
subject to perceptual learning would surely be cortical.
The resulting retinal image differences are basically in the realmof degraded target edge contours. That image blur and, to some extent,the nature of the blur, is being detected and utilized in controlof the eye’s axial length, is an implication in many current studiesin myopia. But what is in play here is something else: distinguishingsubtle contour differences in blurred targets. To satisfy theinescapable precondition of learning, it would have to be presumedthat they were present all along but needed many presentationswith error identification to learn to be recognized. Though the differencesin degradation would, of course, have to have been encodedin differences in retinal ganglion cell discharges, theapparatus for detecting the subtle differences and that might besubject to perceptual learning would surely be cortical.
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