Biomaterial Database

Divergence excess exotropia. 1987

B S Kran, and R Duckman

Boston Optometric Center, MA 02115.

This paper presents a summary of information regarding divergence excess exotropia. The first portion of the paper deals with the description (i.e., definition, onset, natural history, prevalence, sexual distribution, symptomatology, and the differential diagnosis of the two subtypes) of this entity. The second portion of the paper reviews the various treatment options (surgery, lens therapy, prism therapy, and vision training) currently available with emphasis on vision training/orthoptics. We conclude that divergence excess exotropia is effectively managed at least as well by vision training/orthoptics as it is by surgery. We propose that future research examine in greater detail the characteristics of the subtypes of this entity to potentially derive improved training techniques for this population.

UI	MeSH Term	Description	Entries
D005099	Exotropia	A form of ocular misalignment where the visual axes diverge inappropriately. For example, medial rectus muscle weakness may produce this condition as the affected eye will deviate laterally upon attempted forward gaze. An exotropia occurs due to the relatively unopposed force exerted on the eye by the lateral rectus muscle, which pulls the eye in an outward direction.	Exophoria,Strabismus, Divergent,Alternating Exotropia,Divergent Strabismus,Exodeviation,Monocular Exotropia,Primary Exotropia,Secondary Exotropia,Exodeviations,Exotropia, Alternating,Exotropia, Monocular,Exotropia, Primary,Exotropia, Secondary
D006801	Humans	Members of the species Homo sapiens.	Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
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