June 2020
Volume 61, Issue 7
Free
ARVO Annual Meeting Abstract  |   June 2020
Effective Field of View of Wide-Field Fundus Camera for Retinopathy of Prematurity Screening
Author Affiliations & Notes
  • Marco H. Ji
    Stanford University, Palo Alto, California, United States
  • Zachary Bodnar
    Meadows Retina, Nevada, United States
  • Natalia F. Callaway
    Stanford University, Palo Alto, California, United States
  • Cassie A. Ludwig
    Stanford University, Palo Alto, California, United States
  • Jochen Kumm
    Pr3vent inc, Palo Alto, California, United States
  • Tatiana Rosenblatt
    Stanford University, Palo Alto, California, United States
  • Darius Moshfeghi
    Stanford University, Palo Alto, California, United States
  • Footnotes
    Commercial Relationships   Marco Ji, None; Zachary Bodnar, None; Natalia Callaway, None; Cassie Ludwig, None; Jochen Kumm, Pr3vent Inc (I); Tatiana Rosenblatt, None; Darius Moshfeghi, 1800 Contacts (I), Alcon (C), Congruence Medical Solutions (C), dSentz (I), Grand Legend Technology (I), Iconic Therapeutics (C), InSitu Therapeutics (C), Irenix (I), Linc (I), Novartis (C), Pr3vent (I), Pykus (I), Regeneron (C), Versl (I), Vindico (C), Visunex Medical Systems (I)
  • Footnotes
    Support  None
Investigative Ophthalmology & Visual Science June 2020, Vol.61, 2162. doi:
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      Marco H. Ji, Zachary Bodnar, Natalia F. Callaway, Cassie A. Ludwig, Jochen Kumm, Tatiana Rosenblatt, Darius Moshfeghi; Effective Field of View of Wide-Field Fundus Camera for Retinopathy of Prematurity Screening. Invest. Ophthalmol. Vis. Sci. 2020;61(7):2162.

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

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Abstract

Purpose : To evaluate the effective Field of View (FOV) of wide-field contact fundus camera used to screen Retinopathy of Prematurity (ROP)

Methods : The Stanford University Network for Diagnosis of Retinopathy of Prematurity (SUNDROP) is an outreach telemedicine screening program for ROP active in 10 Neonatal Intensive Care Units across California, Nevada and Indiana. All infants who met the screening criteria for ROP received telemedicine fundus examination using Retcam II/III with a wide-field 130-degree FOV lens. The examination consists in six standard fundus photographs per eye that capture respectively the iris, posterior pole, superior, inferior, temporal and nasal quadrants. Five examinations per year between 2006 and 2019 for a total of 140 eyes have been selected randomly from the SUNDROP database. The linear distances were measured in disc diameter (DD) and the effective FOVs were calculated considering an average axial length of 18.5 mm.

Results : The average effective FOV was between 132.2 and 142.2-degree. The average FOV was similar in the right and left eye, except the superior quadrant of the right eye was significantly larger compared to the left eye (p=0.0001). Patients with active ROP had wider temporonasal FOV compared to those without the disease (p=0.003).

Conclusions : Even though telemedicine examinations are considered standardized procedures, the effective FOV between exams can be very variable with an average of 132.2 and 142.2-degree. However, the SUNDROP initiative using this technology did not miss any treatment-requiring ROP case in 14 years of its activity. The FOV in patients with ROP was averagely larger, probably because the photographer tried harder to reach the periphery in the presence of the disease.

This is a 2020 ARVO Annual Meeting abstract.

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