title: Scotoma displacement in the macular mapping test as a tool for identification of preferred retinal loci.
abstract: OBJECTIVE
  To clarify the efficacy of the macular mapping test (MMT) to identify eccentric fixation with preferred retinal loci (PRL).
  
  
  METHODS
  Retrospective observational case series from archived data.
  
  
  METHODS
  Cases with age-related macular degeneration with low vision in both eyes and best corrected visual activity (BCVA) of 20/50 to 20/400 in the better eye.
  
  
  METHODS
  Identification of preferred retinal loci with the Nidek MP-1 microperimeter and correlation with scotoma displacement on perimetry records as recorded with the MMT.
  
  
  RESULTS
  We recruited data on 43 patients (12 males and 31 females), aged 57-96 years (mean 84.05 years ± SD 8.00). Mean BCVA was 0.9 ± 0.32 SD logMar units (20/160). PRL location matched the direction of scotoma displacement in 32 study subjects (74.41%, p < 0.002).
  
  
  CONCLUSIONS
  Scotoma displacement recorded with the MMT offers reasonable indirect estimates on PRL location.
authors.affiliation: Low Vision Service (University Health Network Hospitals), Department of Ophthalmology and Vision Sciences, University of Toronto, Toronto, Ont.
authors.forename: Murad
authors.initials: M
authors.lastname: Al-Serafi
authors.forename: Samuel N
authors.initials: SN
authors.lastname: Markowitz
authors.forename: Sophia V
authors.initials: SV
authors.lastname: Reyes
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D003941:Diagnostic Techniques, Ophthalmological; D005260:Female; D005403:Fixation, Ocular; D006801:Humans; D008268:Macular Degeneration / Q000175:diagnosis* / Q000503:physiopathology; D008297:Male; D008875:Middle Aged; D012160:Retina / Q000473:pathology*; D012189:Retrospective Studies; D012607:Scotoma / Q000175:diagnosis* / Q000503:physiopathology; D015354:Vision, Low / Q000175:diagnosis / Q000503:physiopathology; D014792:Visual Acuity / Q000502:physiology