1 Convergence excess is a clinical condition in which the eyes have a tendency to turn excessively inward when viewing an object at a near distance compared to a far distance. 2  Clinical signs include: greater esophoria at near distance than far distance, high AC/A ratio, and a high lag of accommodation. 3  Treatment options. 1 Clinical signs of basic esophoria include: AC/A ratio is normal, equal esophoria at distance and near, and normal near point of convergence. 2  Although exotropia has been described, 2 a decompensating esophoria attributable to myasthenia gravis is extremely rare: to date there are no other reports of this in the literature. Myasthenia gravis affecting one or a combination of the extraocular muscles without ptosis is less common; however, cases such as bilateral internuclear ophthalmoplegia without ptosis have been described exophoria. heterophoria in which there is deviation of the visual axis of an eye away from that of the other eye in the absence of visual fusional stimuli. adj., adj exopho´ric. (ek'so-fō'rē-ă), Do not confuse this word with esophoria.  Myasthenia gravis is a disease in which antibodies directed at nicotinic acetylcholine receptors are produced, leading to a deficiency of acetylcholine receptors at the neuromuscular junction. This results in impairment of muscular excitation, which appears clinically as fatigable muscle weakness. Weakness of the extraocular muscles occurs in nearly 90% of all myasthenics at disease onset, with ptosis being the most common presenting feature. Myasthenia gravis affecting one or a combination of the extraocular muscles without ptosis is less common; however, cases such as bilateral internuclear ophthalmoplegia without ptosis have been described in the literature. This results in impairment of muscular excitation, which appears clinically as fatigable muscle weakness. Weakness of the extraocular muscles occurs in nearly 90% of all myasthenics at disease onset, with ptosis being the most common presenting feature. Exophoria. Exophoria is a tendency of the eyes to want to turn more outward than necessary when an individual is viewing an object at near or at distance, which may cause the individual to experience eyestrain and other symptoms. 1 Clinical signs of basic esophoria include: AC/A ratio is normal, equal esophoria at distance and near, and normal near point of convergence. 2  Convergence excess is a clinical condition in which the eyes have a tendency to turn excessively inward when viewing an object at a near distance compared to a far distance. A condition in which each eye has a different refractive error (prescription). For example, one eye is mildly nearsighted (myopic) while the other is very nearsighted. Or one eye is nearsighted and the other eye is farsighted. There are many variations. When associated with farsightness, this visual condition is a common cause of Amblyopia. Esotropia. A muscle condition in which when both eyes are open one eye is turned inwards. The eye turn may occur 100% of the time and is called constant or some of the time and is called intermittent. See our detailed page on esotropia. Exophoria is a form of heterophoria in which there is a tendency of the eyes to deviate outward. During examination, when the eyes are dissociated by prisms, the visual axes will appear to diverge away from one another. Exophoria can be caused by several factors, which include: 1  Refractive errors-distance and near deviation approximately equal. 2  Divergence excess-exodeviation is more than 15 dioptres greater for distance than near deviation. 3  Convergence insufficiency-near exodeviation greater than distance deviation. Received 13 August 2008, Accepted 20 January 2009, Available online 22 April 2009. Myasthenia gravis is a disease in which antibodies directed at nicotinic acetylcholine receptors are produced, leading to a deficiency of acetylcholine receptors at the neuromuscular junction. This results in impairment of muscular excitation, which appears clinically as fatigable muscle weakness. Myasthenia gravis affecting one or a combination of the extraocular muscles without ptosis is less common; however, cases such as bilateral internuclear ophthalmoplegia without ptosis have been described in the literature.
http://www.naturaleyecare.com/eye-conditions/binocular-conditions/binocular-conditions-symptoms.asp http://www.sciencedirect.com/science/article/pii/S1091853109000585 http://medical-dictionary.thefreedictionary.com/exophoria http://www.ncbi.nlm.nih.gov/pubmed/19395293 http://www.ncbi.nlm.nih.gov/pubmed/19395293 http://www.naturaleyecare.com/eye-conditions/binocular-conditions/binocular-conditions-symptoms.asp http://www.strabismus.org/various_strabismus_treatments.html https://en.wikipedia.org/wiki/Exophoria http://www.sciencedirect.com/science/article/pii/S1091853109000585
what is decompensating esophoria