Abstract
Purpose :
Smartphone is easy tool for patients and ophthalmologists to communicate the data access. We propose “Hikaru ring”, a portable, low-cost, and easily measurable keratoconus detection device which is based on smartphone selfie camera images.
Methods :
We designed the Hikaru ring as a gadget comprising of a 3D-printed placido’s rings of LED light combined with the smartphone. Two circle LEDs (12-cm and 6-cm) were attached with cone-shaped gadget and both corneas were irradiated at a distance of 15 cm and 19 cm, respectively. Selfie photographs were taken using the ring attached smartphone in normal and keratoconus subjects. Captured mire images of the reflection of the placido’s rings on the cornea were analyzed by an intelligent Windows software based on the corneal parameters. Anterior segment optical coherence tomography was also performed in each subject.
Results :
In a clinical study, we successfully identified the diagnosis of keratoconus based on eccentricity and steepest keratometry in smartphone selfie style. We found significant correlation of corneal astigmatism and steepest keratometry between Hikaru ring and standard tomography (r = 0.533, p < 0.001 and r = 0.656, p < 0.001).
Conclusions :
Preliminary experimental results show that the proposed method could detect keratoconus. Our novel placido’s rings attached with smartphone is useful for the screening under remote medicine.
This abstract was presented at the 2023 ARVO Annual Meeting, held in New Orleans, LA, April 23-27, 2023.