June 2023
Volume 64, Issue 8
Open Access
ARVO Annual Meeting Abstract  |   June 2023
NW500 automatic bilateral 2-field fundus imaging time study
Author Affiliations & Notes
  • Sarah Armstrong
    Topcon Healthcare, Oakland, New Jersey, United States
  • Tobias Kurzke
    Topcon Healthcare, Oakland, New Jersey, United States
  • Jessica Menou
    New View Optometric Center, La Mesa, California, United States
  • Mayra Tafreshi
    Topcon Healthcare, Oakland, New Jersey, United States
  • David Kasanoff
    New View Optometric Center, La Mesa, California, United States
  • Nevin W. El-Nimri
    Topcon Healthcare, Oakland, New Jersey, United States
  • Footnotes
    Commercial Relationships   Sarah Armstrong Topcon Healthcare, Code E (Employment); Tobias Kurzke Topcon Healthcare, Code E (Employment); Jessica Menou None; Mayra Tafreshi Topcon Healthcare, Code E (Employment); David Kasanoff Topcon Healthcare, Code C (Consultant/Contractor); Nevin El-Nimri Topcon Healthcare, Code E (Employment)
  • Footnotes
    Support  None
Investigative Ophthalmology & Visual Science June 2023, Vol.64, 5015. doi:
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    • Get Citation

      Sarah Armstrong, Tobias Kurzke, Jessica Menou, Mayra Tafreshi, David Kasanoff, Nevin W. El-Nimri; NW500 automatic bilateral 2-field fundus imaging time study. Invest. Ophthalmol. Vis. Sci. 2023;64(8):5015.

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

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Abstract

Purpose : To determine how long it takes for the Topcon NW500 fundus camera to automatically acquire four images and to assess their quality using the bilateral 2-field fundus imaging protocol.

Methods : Upon positioning a subject’s head on the chinrest and forehead rest, the operator initiated the bilateral 2-field acquisition protocol. The NW500 automatically captured images centered on the optic disc and macula, respectively. The same image acquisition protocol was repeated for both eyes. A total of 4 images were acquired per subject (Figure 1). Total acquisition time was recorded as the time the capture button was pressed until the final image was displayed on the screen. All images were captured in a well-illuminated room without dilation. An experienced imgae grader determined the clinical usefullness using a 5-point grading scale (with 1 as the lowest and 5 as the highest).

Results : Ten eyes of five subjects were imaged. The demographics of the subjects were as follows: mean age was 61.8 years; majority female (60%); majority Caucasian (80% Caucasian, 20% African American & American Indian/Alaskan Native). Subjects were not screened for the presence or absence of ocular pathology. However, subjects self-reported known eye conditions (ocular hypertension, glaucoma suspect, glaucoma x3). The mean total acquisition time was 56 seconds with a range of 49 to 67 seconds. The average image quality score was 4.7.

Conclusions : On average, the bilateral 2-field fundus imaging protocol automatically captures four high quality images in less than one minute in a well-illuminated room without dilation. Using this protocol, the NW500 is an ideal fit for screening environments that may have less experienced users, undilated patients and brighter imaging conditions.

This abstract was presented at the 2023 ARVO Annual Meeting, held in New Orleans, LA, April 23-27, 2023.

 

Figure 1: Example of 4 images resulting from bilateral 2-field fundus imaging protocol on NW500.

Figure 1: Example of 4 images resulting from bilateral 2-field fundus imaging protocol on NW500.

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