title: Subclinical optic neuropathy in Graves' orbitopathy.
abstract: OBJECTIVE
  The aims of the study were to detect early changes in the optic nerve function of patients with Graves' orbitopathy (GrO) who do not have any signs and symptoms of optic neuropathy, using pattern visual evoked potentials (P-VEP), and investigate any possible relation between the disease activity and P-VEP P100 latencies of the patient group.
  
  
  METHODS
  The study was conducted in a tertiary care hospital. Sixteen patients with GrO and 15 healthy controls were enrolled. P-VEP P-100 latencies were compared between these two groups. Correlation between the clinical disease activity and P-VEP P-100 latencies of the patient group was also investigated.
  
  
  RESULTS
  Mean P-VEP P-100 latency values were significantly different in the GrO (122.0+/-14.40 ms) and control groups (105.9+/-7.7 ms) (P=.0004). The GrO patients' P-100 latencies correlated mildly with their activity scores (r=.364, P=.0406).
  
  
  CONCLUSIONS
  Clinical application of the P-VEP for the assessment of visual function in patients with GrO proved useful for early diagnosis of the optic nerve involvement, and it may be more valuable in patients with "active" congestive disease.
authors.affiliation: Department of Neuro-ophthalmology, Social Security Eye Hospital, Ankara, Turkey. golgetilki@yahoo.com
authors.forename: Gölge
authors.initials: G
authors.lastname: Acaroğlu
authors.forename: Tülay
authors.initials: T
authors.lastname: Simşek
authors.forename: Solmaz
authors.initials: S
authors.lastname: Ozalp
authors.forename: Ayşe
authors.initials: A
authors.lastname: Mutluay
mesh_terms: D000328:Adult; D016022:Case-Control Studies; D005074:Evoked Potentials, Visual; D005260:Female; D006111:Graves Disease / Q000150:complications* / Q000175:diagnosis; D006801:Humans; D008297:Male; D008875:Middle Aged; D009901:Optic Nerve Diseases / Q000209:etiology*; D010775:Photic Stimulation / Q000379:methods; D011930:Reaction Time