title: [Application of frequency doubling technology perimetry in the diagnosis of glaucoma].
abstract: OBJECTIVE
  Evaluation of the frequency doubling technology perimetry in the detection of an early glaucomatous field loss.
  
  
  METHODS
  Twenty-two patients (40 eyes), who were diagnosed with ocular hypertension were enrolled in the study. The diagnosis was made based on slit lamp examination, 3 measurements of intraocular pressure (IOP) over 21 mmHg. Standard perimetry was performed with Humphrey perimeter and SITA program (30-2 threshold). Then, all patients underwent FDT perimetry with 30-2 threshold program. Patients, who had any changes in FDT visual field had to repeat the test, to confirm the results.
  
  
  RESULTS
  Out of 40 eyes with the normal white on white perimetry 5 eyes (5 patients) presented defects in FDT perimetry. They had optic disc c/d asymmetry > 0.1 and the nerve fiber layer defects corresponding to the visual field defects in FDT perimetry.
  
  
  CONCLUSIONS
  Frequency Doubling Technology perimetry may be useful as a supplemental method of the visual field evaluation, particularly in patients where standard perimetry does not show any functional damage.
authors.affiliation: I Kliniki Okulistyki Akademii Medycznej w Lublinie.
authors.forename: Piotr
authors.initials: P
authors.lastname: Kawa
authors.forename: Justyna
authors.initials: J
authors.lastname: Jurkowska
authors.forename: Tomasz
authors.initials: T
authors.lastname: Zarnowski
authors.forename: Zbigniew
authors.initials: Z
authors.lastname: Zagórski
mesh_terms: D000328:Adult; D000368:Aged; D005260:Female; D005901:Glaucoma / Q000175:diagnosis* / Q000209:etiology / Q000503:physiopathology; D006801:Humans; D008297:Male; D008875:Middle Aged; D009798:Ocular Hypertension / Q000150:complications / Q000175:diagnosis; D058609:Visual Field Tests / Q000295:instrumentation*; D014794:Visual Fields / Q000502:physiology