title: [Functional relationship between retinal sensitivity threshold values assessed by standard automated perimetry in glaucoma].
abstract: OBJECTIVE
  To study the correlation between the sensitivity threshold values of the different points assessed by the Humphrey visual field analyzer (24-2 Swedish interactive threshold algorithm [SITA] standard strategy) in glaucoma patients.
  
  
  METHODS
  Prospective cross-sectorial study. One-hundred and four eyes of 104 glaucoma patients, defined by the appearance of the optic nerve head, were evaluated. Retinal threshold sensitivity points of standard automated perimetry (SA) with SITA standard 24-2 program were obtained. The upper and the lower hemifields were studied separately. Pearson correlation coefficients were calculated between the mean threshold sensitivity value at each point of the visual hemifield and the rest of the threshold points in the same hemifield.
  
  
  RESULTS
  Perimetric correlation maps between retinal threshold sensitivity values in the same hemifield were obtained. Most of the points showed moderate to high correlations (r≥0.65. P<0.001) with neighboring points and distant points in the same hemifield.
  
  
  CONCLUSIONS
  There is a functional relationship between neighboring and distant points in Humphrey Visual Field Analyzer (SITA Standard 24-2) in glaucoma patients. This correlation is related to the anatomical arrangement of ganglion cell axons. This fact enables perimetric patterns of glaucoma defects to be obtained.
authors.affiliation: Servicio de Oftalmología, Hospital Universitario Miguel Servet, Servicio Aragonés de la Salud, Zaragoza, Spain. noemiguerri@hotmail.com
authors.forename: N
authors.initials: N
authors.lastname: Güerri
authors.forename: V
authors.initials: V
authors.lastname: Polo
authors.forename: J M
authors.initials: JM
authors.lastname: Larrosa
authors.forename: C
authors.initials: C
authors.lastname: Egea
authors.forename: A
authors.initials: A
authors.lastname: Ferreras
authors.forename: L E
authors.initials: LE
authors.lastname: Pablo
mesh_terms: D000328:Adult; D000368:Aged; D000465:Algorithms; D003430:Cross-Sectional Studies; D005901:Glaucoma / Q000503:physiopathology*; D006801:Humans; D008875:Middle Aged; D011446:Prospective Studies; D012160:Retina / Q000503:physiopathology*; D012684:Sensory Thresholds; D058609:Visual Field Tests