Diopter Measurement of Human Eye Based on Dual-Focus Swept Source Optical Coherence Tomography

Refractive error affects people’s vision and may be the cause of a variety of fundus diseases. Early detection of refractive error and its location are very important to protect vision and prevent the occurrence of pathological symptoms. In this paper, a dual-focus SS-OCT system was developed to obtain whole-eye imaging and eight biometry parameters, which include corneal center thickness, lens center thickness, anterior chamber depth, vitreous chamber depth, corneal anterior and posterior surface curvature, lens anterior and posterior surface curvature. The diopter of each refractive component and the whole eye can be calculated from these parameters. Healthy subjects were measured under different accommodative stimuli using the proposed system and compared with the refractometer. The results show that there is a high consistency between the two in the overall diopter. The advantage of our system is that it cannot only measure the overall refractive deviation, it can also find the location of the deviation, which will be critical for the prevention and treatment of refractive system diseases in humans.