Band Atrophy
Conditions
Keywords
Band atrophy, Pattern electroretinogram, Chiasmal compression, Neural loss, Electrophysiological tests
Brief summary
The study is designed to evaluate the ability of pattern electroretinogram (PERG) and multifocal pattern electroretinogram (mfPERG) to measure and identify the pattern of band atrophy of the optic nerve in patients with long standing chiasmal lesions. The hypothesis is that these electrophysiological tests were able to identify this such pattern. The idea is to investigate the ability of the these electrophysiological technics in detecting the neural loss from chiasmal compression and to evaluate the ability of PERG and mfPERG parameters to differentiate between eyes with band atrophy of the optic nerve and healthy eyes.
Interventions
Full field and hemifield (nasal and temporal) stimulation transient pattern electroretinogram (PERG) were recorded both in patients and controls.
Sponsors
Fundação de Amparo à Pesquisa do Estado de São Paulo
University of Sao Paulo
Study design
Observational model
COHORT
Time perspective
PROSPECTIVE
Eligibility
Sex/Gender
ALL
Age
18 Years to 75 Years
Healthy volunteers
No
Inclusion criteria
1. Visual acuity better than 20/30 2. Refractive error less 5 spherical diopter and 3 cylinder diopter 3. Temporal field defect
Exclusion criteria
1. Presence of glaucoma and optic nerve anomalies 2. Anormal nasal field
Countries
Brazil
Outcome results
None listed