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Displaying items by tag: binoculaire

Tuesday, 14 January 2020

Convergence insufficiency

Convergence insufficiencyCliquez ici pour lire l'article

One of the most common disorders of binocular vision encountered in the eye clinic is convergence insufficiency (CI). Population studies estimate upwards of 8% of the population suffer from convergence insufficiency, with the incidence increasing with age. Convergence insufficiency results with vergence ability at near is unable to match vergence demand. When this occurs, sensory fusion may be disrupted leading to intermittent diplopia, asthenopia, and fatigue. Clinicians should be able to quickly screen for abnormalities in convergence ability of a patient and provide a thorough evaluation of binocular ability when indicated. Many patients will respond well to vergence therapy, leading to both an increase in fusional vergence ability and a subsequent decrease in symptoms.

 

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Article tiré du magazine "Point de vue"

points de vue

Published in Optometry

Proper visual correction and safe drivingCliquez ici pour lire l'article

The results of optometric analyses are reported to discuss the relationship between adequate visual acuity, efficient state of binocularity, and other abilities required when driving. The results are also supported by the presence of substantial symptoms reported by drivers and associated with these visual performances. Experimental evidence found that the role of visual acuity related to the binocularity, particularly in presence of anisometropia, has consequences on the perception of distances in terms of speed of perception (stereospeed). Significant correlation was also found between visual acuity and both glare sensitivity and light vision. Both eye-hand and eye-foot reaction times were measured, and the presence of limitations of the visual field was found to influence the speed of response to a visual stimulus.

 

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Article tiré du magazine "Point de vue"

points de vue

Published in Optometry