title: Measurement of Retinal Sensitivity on Tablet Devices in Age-Related Macular Degeneration.
abstract: OBJECTIVE
  We compared measurements of central retinal sensitivity on a portable, low-cost tablet device to the established method of microperimetry in age-related macular degeneration (AMD).
  
  
  METHODS
  A customized test designed to measure central retinal sensitivity (within the central 1° radius) on a tablet device was developed using an open-source platform called PsyPad. A total of 30 participants with AMD were included in this study, and all participants performed a practice test on PsyPad, followed by four tests of one eye and one test of the other eye. Participants then underwent standardized microperimetry examinations in both eyes.
  
  
  RESULTS
  The average test duration on PsyPad was 53.9 ± 7.5 seconds, and no significant learning effect was observed over the examinations performed (P= 1.000). The coefficient of repeatability of central retinal sensitivity between the first two examinations on PsyPad was ±1.76 dB. The mean central retinal sensitivity was not significantly different between PsyPad (25.7 ± 0.4 dB) and microperimetry (26.1 ± 0.4 dB,P= 0.094), and the 95% limits of agreement between the two measures were between -4.12 and 4.92 dB.
  
  
  CONCLUSIONS
  The measurements of central retinal sensitivity can be performed effectively using a tablet device, displaying reasonably good agreement with those obtained using the established method of microperimetry.
  
  
  CONCLUSIONS
  These findings highlight the potential of tablet devices as low-cost and portable tools for developing and performing visual function measures that can be easily and widely implemented.
authors.affiliation: Centre for Eye Research Australia University of Melbourne, Royal Victorian Eye and Ear Hospital, Melbourne, Australia.
authors.forename: Zhichao
authors.initials: Z
authors.lastname: Wu
authors.affiliation: Centre for Eye Research Australia University of Melbourne, Royal Victorian Eye and Ear Hospital, Melbourne, Australia.
authors.forename: Robyn H
authors.initials: RH
authors.lastname: Guymer
authors.affiliation: Centre for Eye Research Australia University of Melbourne, Royal Victorian Eye and Ear Hospital, Melbourne, Australia.
authors.forename: Chang J
authors.initials: CJ
authors.lastname: Jung
authors.affiliation: Centre for Eye Research Australia University of Melbourne, Royal Victorian Eye and Ear Hospital, Melbourne, Australia.
authors.forename: Jonathan K
authors.initials: JK
authors.lastname: Goh
authors.affiliation: Centre for Eye Research Australia University of Melbourne, Royal Victorian Eye and Ear Hospital, Melbourne, Australia.
authors.forename: Lauren N
authors.initials: LN
authors.lastname: Ayton
authors.affiliation: Centre for Eye Research Australia University of Melbourne, Royal Victorian Eye and Ear Hospital, Melbourne, Australia.
authors.forename: Chi D
authors.initials: CD
authors.lastname: Luu
authors.affiliation: Department of Computing and Information Systems, University of Melbourne, Melbourne, Australia.
authors.forename: David J
authors.initials: DJ
authors.lastname: Lawson
authors.affiliation: Department of Computing and Information Systems, University of Melbourne, Melbourne, Australia.
authors.forename: Andrew
authors.initials: A
authors.lastname: Turpin
authors.affiliation: Department of Optometry and Vision Sciences, University of Melbourne, Melbourne, Australia.
authors.forename: Allison M
authors.initials: AM
authors.lastname: McKendrick
keywords: age-related macular degeneration; iPad; microperimetry; visual function