A deficit in strabismic amblyopia for global shape detection
نویسندگان
چکیده
منابع مشابه
A deficit in strabismic amblyopia for global shape detection
Using a task which relied upon the detection of sinusoidal deformations from circularity, we show that strabismic amblyopes exhibit deficits which are not critically dependent on either the scale of deformation or the spatial frequency characteristics of the stimulus (circular D4) itself. We show that this loss is not due to the restricted passband of the amblyopic eye. Furthermore, in a pedest...
متن کاملThe global shape detection deficit in strabismic amblyopia: Contribution of local orientation and position
We extended a previous study (Hess et al. (1999). A deficit in strabismic amblyopia for global shape detection. Vision Research, 39, 901-914) where it was claimed that strabismic amblyopes exhibit a deficit for the detection of continuous radial frequency patterns, a task that is thought to involve global processing and in particular, a contribution of extra-striate area V4. We confirm this pre...
متن کاملThe neural deficit in strabismic amblyopia: sampling considerations
In order to understand the nature of the neural loss in strabismic amblyopia, we have applied a technique which has been used in the normal periphery to psychophysically probe the sampling properties of the neuronal population. We ask whether there is a 'sampling' deficit and if so whether it is based on either an absolute loss of neurons (i.e. spatial undersampling) or an irregular arrangement...
متن کاملStrabismic amblyopia.
NOTWITHSTANDING the vast literature, a complete and satisfactory definition of the clinical picture of amblyopia in strabismus has not yet been produced, and some symptoms are often confused with those of other forms of functional amblyopia. Bangerter (1953) and many other authors embrace in the term " amblyopia ex anopsia" the amblyopia observed in anisometropia, in high ametropia, and in nyst...
متن کاملImage segregation in strabismic amblyopia
Humans with naturally occurring amblyopia show deficits thought to involve mechanisms downstream of V1. These include excessive crowding, abnormal global image processing, spatial sampling and symmetry detection and undercounting. Several recent studies suggest that humans with naturally occurring amblyopia show deficits in global image segregation. The current experiments were designed to stud...
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ژورنال
عنوان ژورنال: Vision Research
سال: 1999
ISSN: 0042-6989
DOI: 10.1016/s0042-6989(98)00157-6