Pupil responses derived from outer and inner retinal photoreception are normal in patients with hereditary optic neuropathy.

Détails

ID Serval
serval:BIB_FD298AFD886B
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Institution
Titre
Pupil responses derived from outer and inner retinal photoreception are normal in patients with hereditary optic neuropathy.
Périodique
Experimental Eye Research
Auteur⸱e⸱s
Kawasaki A., Collomb S., Léon L., Münch M.
ISSN
1096-0007 (Electronic)
ISSN-L
0014-4835
Statut éditorial
Publié
Date de publication
2014
Peer-reviewed
Oui
Volume
120
Pages
161-166
Langue
anglais
Notes
Publication types: Journal ArticlePublication Status: ppublish
Résumé
We compared the pupil responses originating from outer versus inner retinal photoreception between patients with isolated hereditary optic neuropathy (HON, n = 8) and healthy controls (n = 8). Three different testing protocols were used. For the first two protocols, a response function of the maximal pupil contraction versus stimulus light intensity was generated and the intensity at which half of the maximal pupil contraction, the half-max intensity, was determined. For the third protocol, the pupil size after light offset, the re-dilation rate and re-dilation amplitude were calculated to assess the post-light stimulus response. Patients with HON had bilateral, symmetric optic atrophy and significant reduction of visual acuity and visual field compared to controls. There were no significant mean differences in the response curve and pupil response parameters that reflect mainly rod, cone or melanopsin activity between patients and controls. In patients, there was a significant correlation between the half-max intensity of the red light sequence and visual field loss. In conclusion, pupil responses derived from outer or inner retinal photoreception in HON patients having mild-to moderate visual dysfunction are not quantitatively different from age-matched controls. However, an association between the degree of visual field loss and the half-max intensity of the cone response suggests that more advanced stages of disease may lead to impaired pupil light reflexes.
Mots-clé
Adult, Dark Adaptation, Female, Healthy Volunteers, Humans, Light, Male, Middle Aged, Optic Atrophies, Hereditary/physiopathology, Pupil/physiology, Reflex, Pupillary/radiation effects, Retinal Ganglion Cells/metabolism, Retinal Photoreceptor Cell Inner Segment/physiology, Retinal Photoreceptor Cell Outer Segment/physiology, Rod Opsins/metabolism, Young Adult
Pubmed
Web of science
Création de la notice
05/05/2014 14:18
Dernière modification de la notice
20/08/2019 16:28
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