Behavioral
Vision Training for Hyperopia
J.-P. Leung, M. Yap & S.J. Lagrow |
This
study trained hyperopic persons with the fading and feedback procedure
which was originally designed for training myopes. To measure the
close vision of hyperopes, a near Behavioral Acuity Test (nBAT) was
used. The nature of the nBAT required anisometropic subjects whose
eye-to-eye refractive errors differed by as much as 1.00 D. Two Chinese
college students fulfulling the anisometropic condition were recruited
and trained. The data showed that the procedure was effective in
improving the visual performance of hyperopes on the nBAT and the
pattern of changes were similar to those found in earlier studies
conducted with myopes. The results confirmed the usefulness of operant
training procedures for modifying visual functions in defective eyes.
The partial transfer of training effects from trained to untrained
stimulus favors the dual-process hypothesis which suggests that both
behavioral and physiological factors contributed to the improved
acuity observed.
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