Cup-to-disc ratio measured with mobile device correlates with OCT
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.