May 30, 2019
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Cup-to-disc ratio measured with mobile device correlates with OCT

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Researchers found a strong correlation between vertical cup-to-disc ratios obtained with an electronic mobile device and spectral domain OCT.

The use of this low-cost mobile system could potentially increase access to care among low-income populations and those in remote areas, the authors said.

Sarmento and colleagues performed a single-masked study involving 110 eyes of 110 subjects between 18 and 60 years old. Vertical cup-to-disc ratio (CDR) was measured five times with the electronic mobile device (EMD) and spectral domain OCT by three different ophthalmologists.

The EMD was a PanOptic 11820 Ophthalmoscope (Welch Allyn) combined with a portable TRDM-D5M camera (Terasic) and storage device, according to the study. This model is currently being adapted for use with a smartphone to further decrease costs, authors noted.

The mean values for the vertical CDR were 0.34 ± 0.27 for clinical evaluation, 0.47 ± 0.04 with SD-OCT and 0.42 ± 0.02 with the EMD, all of which were considered to be strongly correlated to each other.

The researchers noted that this work did not involve patients with glaucoma, but that a future study would.

In their conclusion, the authors commented on the potential use of this device in telemedicine: “The EMD may be useful in glaucoma screening programs, particularly in remote areas where access to expensive devices and specialists is more limited.” – by Nancy Hemphill, ELS, FAAO

Disclosures: The authors reported no relevant financial disclosures.