Effect of fixation disparity on distance binocular visual acuity. 1994

T C Jenkins, and F Abd-Manan, and S Pardhan, and R N Murgatroyd
Department of Optometry, Bradford University, West Yorkshire, UK.

Subjects with appreciable values (2 delta and greater) of associated 'phoria, as measured by a Mallett unit, had their distance monocular and binocular visual acuities measured. In the latter case measurements were taken both with the associated 'phoria corrected by prisms and without such a correction. The improvement in binocular acuity compared to monocular acuity was less than would occur in normal subjects with minimal associated 'phorias although the improvement differed accordingly as to whether the readings were eso- or exo-in mature. When the associated 'phorias were corrected with prisms the improvement in binocular over monocular visual acuity was similar to that found in normal subjects.

UI MeSH Term Description Entries
D007909 Lenses Pieces of glass or other transparent materials used for magnification or increased visual acuity.
D008875 Middle Aged An adult aged 45 - 64 years. Middle Age
D004215 Distance Perception The act of knowing or the recognition of a distance by recollective thought, or by means of a sensory process which is under the influence of a set of prior experiences. Distance Discrimination,Discrimination, Distance,Discriminations, Distance,Perception, Distance
D006801 Humans Members of the species Homo sapiens. Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D000328 Adult A person having attained full growth or maturity. Adults are of 19 through 44 years of age. For a person between 19 and 24 years of age, YOUNG ADULT is available. Adults
D000368 Aged A person 65 years of age or older. For a person older than 79 years, AGED, 80 AND OVER is available. Elderly
D013285 Strabismus Misalignment of the visual axes of the eyes. In comitant strabismus the degree of ocular misalignment does not vary with the direction of gaze. In noncomitant strabismus the degree of misalignment varies depending on direction of gaze or which eye is fixating on the target. (Miller, Walsh & Hoyt's Clinical Neuro-Ophthalmology, 4th ed, p641) Concomitant Strabismus,Dissociated Horizontal Deviation,Dissociated Vertical Deviation,Heterophoria,Heterotropias,Hypertropia,Non-Concomitant Strabismus,Nonconcomitant Strabismus,Phorias,Squint,Strabismus, Comitant,Strabismus, Noncomitant,Convergent Comitant Strabismus,Mechanical Strabismus,Comitant Strabismus,Comitant Strabismus, Convergent,Deviation, Dissociated Horizontal,Dissociated Horizontal Deviations,Dissociated Vertical Deviations,Heterophorias,Heterotropia,Horizontal Deviation, Dissociated,Hypertropias,Non Concomitant Strabismus,Noncomitant Strabismus,Phoria,Strabismus, Concomitant,Strabismus, Convergent Comitant,Strabismus, Mechanical,Strabismus, Non-Concomitant,Strabismus, Nonconcomitant
D014792 Visual Acuity Clarity or sharpness of OCULAR VISION or the ability of the eye to see fine details. Visual acuity depends on the functions of RETINA, neuronal transmission, and the interpretative ability of the brain. Normal visual acuity is expressed as 20/20 indicating that one can see at 20 feet what should normally be seen at that distance. Visual acuity can also be influenced by brightness, color, and contrast. Acuities, Visual,Acuity, Visual,Visual Acuities
D015348 Vision, Binocular The blending of separate images seen by each eye into one composite image. Binocular Vision
D015349 Vision, Monocular Images seen by one eye. Monocular Vision,Monovision

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