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At least 1,693 records · Page 94Linked to original sources
PubMed1981

Prior strabismus protects kitten cortical neurons from the effects of monocular deprivation.

The effects of 8 days of monocular eyelid suture beginning at 45 days of age were compared in normal kittens and in kittens which had been made strabismic by surgery early in life. In both groups of animals, monocular deprivation increased the relative strength of inputs from the non-deprived eye at the cortical level, but this effect was clearly less pronounced in the strabismic animals. The reduced effect of monocular deprivation in strabismic animals was observed mainly in the cortical hemisphere contralateral to the deprived eye.

Animals↗
PubMed1982

Divergent strabismus following neonatal callosal section is due to a failure of convergence.

Eye alignment was measured in neonatal callosum-sectioned cats that were 1-3 years old. Alignment was measured from photographs of the cat's corneal reflex when alert, anesthetized and paralyzed, and by plotting to optic disc separation during paralysis. The callosal alignment was equally divergent when alert and paralyzed and was identical to the control alignment under paralysis. Therefore, the alert callosal divergence results from a failure to converge the eyes.

Animals↗
PubMedDate not supplied

Restrictive factors in strabismus.

Either muscle weakness (paresis) or mechanical restrictions can account for diminished ocular rotation. In practice, restrictions are more commonly seen. The forced duction test, differential intraocular pressure measurement and saccadic velocity studies can all assist in documenting the presence of restriction. Restrictions frequently occur with orbital floor fracture, endocrine ophthalmopathy and Brown's syndrome, and following multiple stabismus procedures, orbital or retinal detachment surgery, or muscle transposition surgery. They also occur as a result of antagonist muscle contracture after rectus muscle palsy or they may be due to orbital tumor or inflammation.

Adult↗
PubMedDate not supplied

Gaze-induced strabismus.

A 20-year-old woman with a past history of a sinonasal undifferentiated carcinoma involving the skull base and cavernous sinus, previously treated with surgery and radiation therapy, presented with intermittent horizontal diplopia induced by gaze to the right side. The gaze in the direction of the action of the right VI nerve produced sustained contraction of the right lateral rectus and an exodeviation increasing on left gaze. Ocular neuromyotonia involving the right VI nerve was believed to be secondary to the patient's previous radiation therapy. The discussants review the prior literature regarding ocular neuromyotonia involving the III, IV and VI cranial nerves, its relationship to prior radiation therapy, and possible modes of therapy including the use of Carbamazepine.

Abducens Nerve↗
PubMed1986

Visual localization after strabismus surgery is compatible with the "outflow" theory.

Strabismic patients pointed at visual targets, presented monocularly, without sight of the pointing arm. After surgical rotation of one eye in the orbit the pointing responses were shifted by a similar amount in the opposite direction in 13 out of 14 patients; this outcome corresponds to the predictions of the outflow theory of visual localization. Occasional differences between predicted and actual response shifts can be attributed to the well-known ambiguity of localization in strabismics.

Humans↗
PubMed1989

McCollough aftereffects in strabismus and amblyopia.

In strabismic people, the functioning of the deviating eye is impaired. This impairment is binocular in origin since it depends on stimulation of the straight eye; sensitivity and acuity of the deviating eye are usually better when the straight eye is patched than when both eyes are viewing. We investigated interactions between the eyes in strabismic people by using the McCollough color aftereffect as an exploratory procedure. Both normal and strabismic people adapted to black and colored bars and then examined black and white test bars. They reported colors in the achromatic test bars that were complementary to the adapting colors; this is the McCollough aftereffect. Both a monocular McCollough effect and a binocular McCollough effect were induced in people having normal vision. Strabismic people did not show a binocular McCollough effect. Aftereffect strengths were the same in each eye of normal people but were stronger in the impaired eye of strabismic people. A speculation is offered as to why the "non-seeing" eye of strabismic people "sees" the aftereffect better.

Adaptation, Ocular↗
PubMedDate not supplied

Strabismus.

Explore the source record for details and available documents.

Child, Preschool↗
PubMed2006

Restrictive horizontal strabismus following blepharoplasty.

PURPOSE: To report a case of horizontal diplopia after a four-lid blepharoplasty. DESIGN: Observational and interventional case report. METHODS: Analysis of the history and management of a 64-year-old man who underwent a four-lid blepharoplasty, after which he developed horizontal diplopia. RESULTS: The patient was found to have a restrictive esotropia. He underwent a recession of the left medial rectus on an adjustable suture, with recurrence of the same pattern of diplopia one month after surgery. CONCLUSIONS: The involvement of the extraocular muscles as a complication of blepharoplasty is uncommon, but when it is present, it may be very difficult to treat.

Blepharoplasty↗