Amblyopia
Mostrando 13-24 de 149 artigos, teses e dissertações.
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13. Amblyopia in 4-year-old children treated with grating stimulation and full-time occlusion; a comparative study.
We have compared the effects on visual acuity and binocular functions of grating stimulation (CAM therapy) and full-time occlusion in 38 4-year-old, previously untreated amblyopic children. The patients were divided into subgroups with regard to amblyopia type and fixation pattern. We found that grating stimulation was slightly better than occlusion in impro
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14. Amblyopia: the need for a new approach?
Follow-up of a series of 221 children identified by the present methods of screening, and presenting consecutively with squint and/or amblyopia, shows that there has been no demonstrable improvement in the overall incidence and severity of amblyopia 3 or more years later. A new approach to the problem is required, and this might be based on the identificatio
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15. Increased drift in amblyopic eyes.
Reports are conflicting on the presence of increased drift in amblyopic eyes. Furthermore, the individual effects of either amblyopia or strabismus alone on ocular drift have not been systematically investigated. We therefore used a photoelectric method to record horizontal eye position during monocular and binocular fixation in patients having amblyopia wit
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16. A first attempt to prevent amblyopia and squint by spectacle correction of abnormal refractions from age 1 year.
Spectacle correction of unusually hypermetropic refractions from age 1 year did not reduce the incidence of squint or amblyopia, nor did it lead to a reduction in the severity of residual amblyopia after subsequent occlusion.
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17. Amblyopia induced by anisometropia without shrinkage of ocular dominance columns in human striate cortex.
Amblyopia can be induced by opacity of the ocular media (e.g., cataract), misalignment of the ocular axes (strabismus), or unequal refractive error in the eyes (anisometropia). Experiments in monkeys have shown that early monocular eyelid suture, a model of amblyopia caused by cataract, results in shrinkage of the eye's ocular dominance columns in striate co
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18. Anisometropic and strabismic amblyopia in the age group 2 years and above: a prospective study of the results of treatment.
Forty-four children aged 2-9 years with strabismic and anisometropic amblyopia were prospectively followed up during amblyopia treatment. The efficacy of optimised treatment in terms of number of cured children, time to achieve cure, and rate of initial improvement of visual acuity was evaluated in relation to age at start of treatment, type and initial degr
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19. Neural plasticity in adults with amblyopia.
Amblyopia is a neuronal abnormality of vision that is often considered irreversible in adults. We found strong and significant improvement of Vernier acuity in human adults with naturally occurring amblyopia following practice. Learning was strongest at the trained orientation and did not transfer to an untrained task (detection), but it did transfer partial
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20. Dynamic vergence eye movements in strabismus and amblyopia: asymmetric vergence.
This report investigates line-of-sight asymmetric disparity vergence in patients having either intermittent strabismus, constant strabismus with amblyopia, or amblyopia without strabismus. We find an absence of disparity vergence in all patients with strabismus and in some with amblyopia only. Accommodative vergence and saccades place the dominant eye on the
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21. Refraction as a means of predicting squint or amblyopia in preschool siblings of children known to have these defects.
215 preschool siblings of children presenting with squint/amblyopia were screened by refraction after cycloplegia. The presence of +2.00 or more D of spherical hypermetropia in both eyes, or +1.00 or more D sphere or cylinder of anisometropia was significantly associated (P=0.0779%) with that child being identified 2+ years later as having either squint or a
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22. Children's vision screening: impact on inequalities in central England.
STUDY OBJECTIVE--To investigate the relationship between age at presentation of amblyopia and social deprivation before and after the introduction of changes to a vision screening service. DESIGN--Two cohorts of children treated for amblyopia in 1983 and 1992. SETTING--THe orthoptic department of Leicester Royal Infirmary. PARTICIPANTS--The 209 patients trea
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23. Natural history of infantile anisometropia.
AIMS/BACKGROUND: In a previous study longitudinal changes of anisometropia were investigated. It was shown that anisometropia arises and vanishes during the emmetropisation process and that the associated risk for amblyopia is low. The aim of this study was to follow acuity and refraction longitudinally in children with marked anisometropia at 1 year of age.
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24. The negative impact of amblyopia from a population perspective: untreated amblyopia almost doubles the lifetime risk of bilateral visual impairment
Van Leewen et al's work provides valuable data, moving us closer to determining whether preschool vision screening can be justified
BMJ Group.