[Pathogenesis of hyperfunction of the inferior oblique muscles in esotropia].
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Biomedical subjects
Publications and source records attributed to I I Kalachev.
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The authors offer a hypothesis on the possibility of development of vertical components of deviation in concomitant eso- or exotropia as a result of specific functioning of horizontal muscles in subjects with oblique palpebral fissure. Such a vertical deviation clinically corresponds to dysfunction (imbalance) of oblique muscles in its symmetrical variant and is therefore termed by the authors "pseudodysfunction of oblique muscles". Differential diagnostic basis for differentiation between true and false dysfunction of oblique muscles in concomitant strabismus is formulated.
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A case with Möbius' facial diplegia is described; the syndrome is characterized by bilateral congenital paralysis of the mimic muscles often associated with paralysis of the abductors of both eyes, convergent strabismus, palsy of sublingual and trigeminal nerve motor branch. This first observation of the syndrome in Russia is uncommon due to a congenital lower lid entropion which is considered untypical of this rare condition. Still, the authors do not rule out a pathogenetic relationship between entropion and other manifestations of the syndrome.