Development of an age-corrected normative database for Saccadic Vector Optokinetic Perimetry (SVOP)

Andrew J. Tatham*, Pam McClean, Ian C. Murray, Alice D. McTrusty, Lorraine A. Cameron, Antonios Perperidis, Harry M. Brash, Brian W. Fleck, Robert A. Minns

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


PRECIS: Normal age-corrected threshold sensitivity values were determined for a new eye tracking perimeter and compared with standard automated perimetry (SAP).

PURPOSE: The purpose of this study was to determine threshold visual field sensitivities in normal subjects performing saccadic vector optokinetic perimetry (SVOP), a new eye tracking perimeter.

PATIENTS AND METHODS: A total of 113 healthy participants performed SVOP and SAP in both eyes with the order of testing randomized. The relationship between SAP and SVOP sensitivity was examined using Bland-Altman plots and 95% limits of agreement. The relationship between sensitivity and age was examined by pointwise linear regression and age-corrected normal threshold sensitivities were calculated.

RESULTS: After excluding unreliable tests, 97 participants with a mean age of 65.9±10.1 years were included. Average SAP mean deviation was -0.87±1.56 dB, SAP sensitivity was 29.20±1.68 dB and SVOP sensitivity was 32.18±1.96 dB. SVOP had a longer test duration (431±110 compared with 307±42 seconds for SAP, P<0.001). On average, the mean sensitivity obtained using SVOP was 2.98 dB higher than average SAP sensitivity, with 95% limits of agreement of -0.11 to 6.15 dB. For each decade older, SAP sensitivity decreased by 0.93 dB (95% confidence interval: 1.21 to 0.64) and SVOP sensitivity decreased by 1.15 dB (95% confidence interval: 1.47 to 0.84).

CONCLUSIONS: The results provide age-corrected normative values for threshold sensitivities from SVOP. Overall, SVOP provided a similar shaped hill of vision as SAP however threshold sensitivities were higher, meaning results are not interchangeable.

Original languageEnglish
Pages (from-to)1106-1114
Number of pages9
JournalJournal of Glaucoma
Issue number12
Publication statusPublished - Dec 2020


  • adult
  • aged
  • aged, 80 and over
  • female
  • fealthy volunteers
  • humans
  • intraocular pressure
  • middle aged
  • reference values
  • saccades/physiology
  • sensitivity and specificity
  • sensory thresholds
  • time factors
  • visual acuity/physiology
  • visual field tests
  • visual fields/physiology
  • perimetry
  • glaucoma
  • visual fields
  • eye tracking


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