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Literature DB >> 7428889

The "vertical effect" in human squint amblyopia.

Abstract

Grating acuity was tested in seven squint amblyopes as a function of orientation. In the squinting eyes of six unilateral amblyopes, the resolution for vertical gratings was much lower (by about 1/2 octave) than that of horizontal gratings. The non-amblyopic eyes of these subjects showed a normal "oblique effect". In one bilateral amblyope the selective loss of resolution for vertical contours was found in both eyes. This effect is well correlated with the reduced incidence of cortical cells encoding vertical contours in squinting cats. Both findings can be interpreted as an adaptive modification of the central visual system to alleviate the selective doubling of the vertical contours caused by strabismus.

Entities: Disease Species

Mesh：

Year: 1980 PMID： 7428889 DOI： 10.1007/bf00237803

Source DB: PubMed Journal: Exp Brain Res ISSN： 0014-4819 Impact factor: 1.972

16 in total

4. Interocular suppression in normal and amblyopic subjects: the effect of unilateral attenuation with neutral density filters.

Authors: U Leonards; R Sireteanu
Journal: Percept Psychophys Date: 1993-07

The "vertical effect" in human squint amblyopia.

1. Orientation anisotropy: incidence and magnitude in Caucasian and Chinese subjects.

Review 2. Perception and discrimination as a function of stimulus orientation: the "oblique effect" in man and animals.

3. Behavioural contrast sensitivity of the cat in various visual meridians.

4. Meridional amblyopia: evidence for modification of the human visual system by early visual experience.

5. Infant visual acuity and its meridional variation.

6. The effect of orientation on the visual resolution of gratings.

7. Effect of orientation on the modulation sensitivity for interference fringes on the retina.

8. Human visual ecology and orientation anisotropies in acuity.

9. Astigmatism and orientation preference in human infants.

10. Orientational anisotropy in infant vision.

1. Short-latency disparity-vergence eye movements in humans: sensitivity to simulated orthogonal tropias.

2. The effects of reverse monocular deprivation in monkeys. I. Psychophysical experiments.

3. Effects of convergent strabismus on spatio-temporal response properties of neurons in cat area 18.

4. Interocular suppression in normal and amblyopic subjects: the effect of unilateral attenuation with neutral density filters.

5. Effects of neonatally induced strabismus on binocular responses in cat area 18.

6. Non-fusable stimuli and the role of binocular inhibition in normal and pathologic vision, especially strabismus.

7. Oblique effects, vertical effects and meridional amblyopia in monkeys.

8. Natural strabismus in non-Siamese cats: lack of binocularity in the striate cortex.