RESUMO
Seventy cases of Duane's syndrome are summarized with particular attention to the prevalence of anisometropia and amblyopia. We found a 17% prevalence of anisometropia and a 3% prevalence of amblyopia among these patients. Amblyopia and anisometropia are not more common in Duane's syndrome than in the general population.
Assuntos
Ambliopia/epidemiologia , Síndrome da Retração Ocular/complicações , Oftalmoplegia/complicações , Erros de Refração/epidemiologia , Adolescente , Criança , Feminino , Humanos , MasculinoRESUMO
Unilateral or bilateral limitation of adduction with jerk nystagmus of the abducting eye occurred after a weakening operation of the medial rectus muscle in five patients aged 9 to 39 years. The nystagmus waveform was indistinguishable and the clinical findings were similar to those in internuclear ophthalmoplegia. Persistence of the abducting nystagmus after occluding the adducting fellow eye in four of the five patients reflected a continued attempt of the central nervous system to increase neural activity to the paretic eye. This hypermetric response disappeared after several days of patching of one eye, only to reappear after removal of the patch. These observations suggested that the generation of abducting nystagmus in conjunction with medial rectus muscle palsy of the fellow eye does not necessarily depend on lesions in the median longitudinal fasciculus, but may also be caused by a gain-step mismatch of the saccadic generation system.
Assuntos
Músculos/cirurgia , Procedimentos Cirúrgicos Oftalmológicos , Oftalmoplegia/etiologia , Adolescente , Adulto , Criança , Olho/fisiopatologia , Humanos , Masculino , Músculos/fisiopatologia , Nistagmo Patológico/etiologia , Nistagmo Patológico/fisiopatologia , Oftalmoplegia/fisiopatologia , Paralisia/etiologia , Paralisia/fisiopatologia , Procedimentos Cirúrgicos Operatórios/efeitos adversosRESUMO
Using a device based on the Pulfrich effect, we examined 70 patients with various strabismus problems and 20 normal subjects for gross stereopsis. We found an excellent correlation between this dynamic stereopsis test and random dot stereograms. Additionally, in several instances the Pulfrich device was easier to use and interpret correctly than random dot stereograms. The Pulfrich effect can be elicited reliably in patients as young as 3 1/2 years of age. Three patients with anisometropic amblyopia and stereopsis were found to possess a spontaneous Pulfrich effect.
