Bionic-EyE: Displace Measurement on Fundus Surface Using Digital Image Correlation

Abstract

We developed the non-contact measurement of principal stress distribution on a retinal model for vitreoretinal surgery simulator. The optical measurement was used to detect small deformation on the retinal model surface without impairing the physical properties of the retinal model. The retinal model reproduces Young's modulus of human retina and sclera, respectively. Digital image correlation (DIC) was used to measure the deformation on the retinal model at subpixel resolution. Principal stress distribution was obtained from the principal strain calculated from deformation and Young’s modulus of retinal model. We demonstrated the measurement of the distribution of maximum principal stress on the retinal model surface during the pushing by the forceps.