Electroretinography
Mostrando 13-24 de 49 artigos, teses e dissertações.
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13. CLINICAL ELECTRORETINOGRAPHY. I
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14. Clinical electroretinography. II.
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15. Multifocal electroretinography in dengue fever‐associated maculopathy
BMJ Group.
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16. Pattern electroretinography in patients with delayed pattern visual evoked potentials due to distal anterior visual pathway dysfunction.
Between March 1983 and January 1988 delayed pattern visual evoked potentials (PVEP) were observed in 67 patients with distal visual pathway dysfunction. Many of these patients had been referred for neurophysiological examination because of possible optic nerve dysfunction. These patients also had pattern electroretinography (PERG) performed which in all case
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17. Transient corneal changes associated with the use of gold foil electrodes.
The corneas of 50 normal subjects were examined before and after electroretinography performed with gold foil electrodes. Examination included slit-lamp biomicroscopy and staining with sodium fluorescein. All corneas were normal on examination prior to electroretinography. Three types of transient corneal changes were observed--punctate epithelial keratitis,
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18. Albinism with haemorrhagic diathesis: Hermansky-Pudlak syndrome.
Four cases of albinism with haemorrhagic diathesis (Hermansky-Pudlak syndrome) are presented. The cases displayed wide phenotypic variation. Electroretinography was performed on all four patients and was found to be normal. One patient developed a cutaneous malignant melanoma.
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19. Comparison of colour discrimination and electroretinography in evaluation of visual pathway dysfunction in aretinopathic IDDM patients.
The slow progression of diabetic retinopathy makes it difficult to assess the effects of intervention therapy. There is thus a need for surrogate markers of visual change in diabetes. Colour vision tests and electroretinography (ERG) may be useful in this regard; yet little is known of their relative performance in the assessment of visual dysfunction in dia
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20. Significance of abnormal pattern electroretinography in anterior visual pathway dysfunction.
The pattern electroretinogram (PERG) findings in 72 patients with disease of the anterior visual pathways are presented in relation to the site of dysfunction. Two components of the PERG are described which are selectively involved in different pathologies. In particular, the main positive P50 component is invariably affected in retinal/macular dysfunction,
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21. Diagnostic features of the Favre-Goldmann syndrome.
Extensive retinal vascular disease was noted in three patients from two families with Favre-Goldmann syndrome. In addition to classical features they had pronounced leakage from some retinal vessels. Vessels were either opaque ('sclerotic') or non-perfused. Cystoid macular oedema was a contributing cause of decreased vision. Two of the three patients showed
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22. Complete avulsion of the optic nerve. A clinical, angiographic, and electrodiagnostic study.
A case of traumatic complete avulsion of the optic nerve is reported together with fluorescein angiography and electrodiagnostic findings. Despite the disappearance of the central vessels, circulation remained in the branch retinal vessels and angiography demonstrated communication between peripapillary choroidal vessels and the superior temporal artery. The
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23. Scanning laser densitometry in visual acuity loss of unknown origin.
AIM: To assess foveal cone photoreceptor function in patients with unexplained loss of central visual acuity. METHODS: Testing of foveal cone photoreceptor function was performed using scanning laser densitometry, colour matching (Rayleigh equation), and pattern electroretinography (ERG). Standard tests included full field ERG, electrooculography, visual evo
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24. Gyrate atrophy of the choroid and retina: ERG of the neural retina and the pigment epithelium.
The function of the neural retina and the pigment epithelium in 10 patients with gyrate atrophy was examined by the conventional alternating current electroretinogram and by direct current electroretinography to study the c-wave. The a- and b-wave responses were subnormal in all patients and the ERG was undetectable in patients with an advanced stage of the