Amblyoscope

AMBLYOSCOPE (from Greek amblyopia-nearsightedness and scopeo-I look), an apparatus invented by Worth, constructed on the model of a mirror stereoscope (see); similar to a haploscope, it allows for convergence and divergence; equipped with a device for changing the brightness of the images being viewed. In practice, the A. is used to restore binocular vision. The A. makes possible the simultaneous perception of visual impressions by both eyes and is especially suitable for incomplete effects of strabismus surgery. By helping to restore binocular vision, the A. consolidates the results achieved by surgery. The A. with variable lighting-Worth's, Krusius'-proves very useful in uncovering simulations of visual impairment in one eye; the ability to change the brightness of one or the other image at will particularly makes it difficult to distinguish the impressions received from the right and left eyes.