Optical design of three-dimensional digital ophthalmoscopes

The optical zoom structure to design a three-dimensional (3D) human-eye optical sensory system with infrared and visible light was proposed. There are two important parts in the study, first, the experiments of two-dimensional (2D) and 3D recognition. According to experimental data on 2D and 3D images, human-eye recognition of 3D images was substantially higher (approximately 13.182%) than that of 2D images. Thus, 3D images are more effective than 2D images when they are used at work or in high-recognition devices. Second, in the optical system design, infrared and visible light wavebands were incorporated as light sources to perform simulations. The results can be used to facilitate the design of optical systems suitable for 3D digital ophthalmoscopes.