September 2016
Volume 57, Issue 12
Open Access
ARVO Annual Meeting Abstract  |   September 2016
Threshold fluctuation comparison between Oculus Smartfield Spark strategy and Humphrey Sita Fast
Author Affiliations & Notes
  • Rodrigo Abreu
    Ophthalmology, University Hospital of La Candelaria, El Sauzal, S/C de Tenerife, Spain
  • Paloma Rodriguez-Esteve
    Ophthalmology, University Hospital of La Candelaria, El Sauzal, S/C de Tenerife, Spain
  • Cristina Pena-Betancor
    Ophthalmology, University Hospital of the Canary Island, La Laguna, Spain
  • Marta Gonzalez-Hernandez
    Ophthalmology, University Hospital of the Canary Island, La Laguna, Spain
  • Manuel Gonzalez-de la Rosa
    University of La Laguna, La Laguna, Spain
  • Footnotes
    Commercial Relationships   Rodrigo Abreu, Novartis (C); Paloma Rodriguez-Esteve, None; Cristina Pena-Betancor, None; Marta Gonzalez-Hernandez, Oculus (P); Manuel Gonzalez-de la Rosa, Oculus (P)
  • Footnotes
    Support  None
Investigative Ophthalmology & Visual Science September 2016, Vol.57, 3929. doi:
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      Rodrigo Abreu, Paloma Rodriguez-Esteve, Cristina Pena-Betancor, Marta Gonzalez-Hernandez, Manuel Gonzalez-de la Rosa; Threshold fluctuation comparison between Oculus Smartfield Spark strategy and Humphrey Sita Fast. Invest. Ophthalmol. Vis. Sci. 2016;57(12):3929.

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      © ARVO (1962-2015); The Authors (2016-present)

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Abstract

Purpose : To evaluate the thresholds fluctuation of the Oculus Smartfield perimeter using Spark strategy and the Humphrey Analyzer perimeter using SITA-Fast strategy.

Methods : The Oculus Smartfield is a prototipe of a compact automated perimeter for static visual field examination which uses a LED’s tangent screen for generating luminous stimuli and a wide diameter lens for near vision compensation. Spark strategy makes four consecutives threshold stimation and the result obtained is a average of them. The Humphrey Analyzer is a proyection commercial perimeter which uses the SITA strategy.
We performed a prospective, observational clinical study to learn about threshold fluctuation differences between Smartfield and Humphrey perimeters. A hundred and five normal eyes and 138 suspect and confirmed glaucomas were examined twice with each system in random order. Fifty two both strategies matching points were analyzed: 30ox24o in Spark (66 points) and 24-2 in SITA-Fast (52 points).

Results : Exam duration was: 2:57 minutes (sd=0:02) in Spark and 2:56 minutes (sd=0:46) in SITA-Fast (P=0.33). Fluctuation in the matching points were respectively: for thresholds between 20-35dB, 1.09dB (sd=1.16) and 1.36dB (sd=1.77) (p<0.0001) and between 0-20dB: 2.23dB (sd=2.51) and 3.76dB (sd=4.80) (P<0.0001). Bland-Altman diagram showed a similar distribution between both perimeters for small and wide desviations.

Conclusions : Fluctuation was significantly lower in the averaged Smartfield-Spark strategy than in Humphrey SITA-Fast, mainly below 20 dB, which results inferior in more than 40%. This fact seems not to be related to both instruments and strategies dynamic range differences.

This is an abstract that was submitted for the 2016 ARVO Annual Meeting, held in Seattle, Wash., May 1-5, 2016.

 

Fluctuation in the matching points were respectively: for thresholds between 20-35dB, 1.09dB (sd=1.16) and 1.36dB (sd=1.77) (p<0.0001) and between 0-20dB: 2.23dB (sd=2.51) and 3.76dB (sd=4.80) (P<0.0001).

Fluctuation in the matching points were respectively: for thresholds between 20-35dB, 1.09dB (sd=1.16) and 1.36dB (sd=1.77) (p<0.0001) and between 0-20dB: 2.23dB (sd=2.51) and 3.76dB (sd=4.80) (P<0.0001).

 

Bland-Altman diagram showed a similar distribution between both perimeters for small and wide desviations.

Bland-Altman diagram showed a similar distribution between both perimeters for small and wide desviations.

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