July 2019
Volume 60, Issue 9
Free
ARVO Annual Meeting Abstract  |   July 2019
Comparison of SITA Faster 24-2C test times to legacy SITA tests
Author Affiliations & Notes
  • Sophia Yu
    Carl Zeiss Meditec, Inc., Dublin, California, United States
  • Gary C Lee
    Carl Zeiss Meditec, Inc., Dublin, California, United States
  • Thomas Callan
    Carl Zeiss Meditec, Inc., Dublin, California, United States
  • Angelina Covita
    Carl Zeiss Meditec, Inc., Dublin, California, United States
  • Todd Severin
    East Bay Eye Center, San Ramon, California, United States
  • Footnotes
    Commercial Relationships   Sophia Yu, Carl Zeiss Meditec, Inc. (E); Gary Lee, Carl Zeiss Meditec, Inc. (E); Thomas Callan, Carl Zeiss Meditec, Inc. (E); Angelina Covita, Carl Zeiss Meditec, Inc. (E); Todd Severin, Carl Zeiss Meditec, Inc. (C)
  • Footnotes
    Support  None
Investigative Ophthalmology & Visual Science July 2019, Vol.60, 2454. doi:
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    • Get Citation

      Sophia Yu, Gary C Lee, Thomas Callan, Angelina Covita, Todd Severin; Comparison of SITA Faster 24-2C test times to legacy SITA tests. Invest. Ophthalmol. Vis. Sci. 2019;60(9):2454.

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

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Abstract

Purpose : 24-2C is a new SITA test pattern that adds 10 central test points common to the 10-2 pattern to the traditional 24-2 field. The diagnostic performance of the SITA Faster 24-2C test pattern is comparable to the test locations common to the 24-2 SITA Fast and 10-2 patterns. Test times for legacy SITA strategies (Standard, Fast and Faster) have been previously compared. The purpose of this study is to evaluate the test times of SITA Faster 24-2C (SFR-C) compared with legacy SITA strategies.

Methods : 24-2 SITA Standard (SS), 24-2 SITA Fast (SF24), 10-2 SITA Fast (SF10), and SFR-C visual fields (VFs) were acquired on an HFA3 Model 860 perimeter (ZEISS, Dublin, CA) at each of two visits on one eye of a group of 25 normal and 25 glaucomatous subjects. The last qualified test for each VF was used for data analyses. 24-2 SITA Faster (SFR) VFs and test times were extracted from SFR-C. SFR-C test times were compared to the test times of SS, SF24, SF10, and SFR.

Results : Median Mean Deviation (MD)SS was 0.65 (IQR: 1.3; range: -2.76 to 2.28) dB and -1.81 (IQR: 2.68; range: -21.77 to 1.61) dB in normal and glaucomatous eyes, respectively. Mean ± SD, range of test times, and percent time improvements are summarized in Table 1. In normal and glaucomatous eyes, respectively, SFR was 61.6% and 58.2% faster than SS, 35.8% and 32.6% faster than SF24, and 18.5% and 17.5% faster than SFR-C. Similarly, SFR-C was 21.2% and 18.3% faster than SF24 in normal and glaucomatous eyes, respectively. Figure 1 shows the durations versus MD values for each test strategy.

Conclusions : SFR-C combines 10 central test points from the 10-2 pattern with a 24-2 field and still has a faster test duration than the SF24 or SF10. 24-2C SITA Faster may provide a reasonable clinical alternative to current threshold strategies for the diagnosis of glaucoma.

This abstract was presented at the 2019 ARVO Annual Meeting, held in Vancouver, Canada, April 28 - May 2, 2019.

 

Table 1. Test time comparisons

Table 1. Test time comparisons

 

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