Laser & Optoelectronics Progress, Vol. 57, Issue 21, 213301 (2020)
Intraocular Lens Model and Its Three-Dimensional Printing Technology Based on Human Eye Data in China
Danqi Wang1, Qun Yuan1, Changjun Yin2, Zhishan Gao1, and Xinhua Li1,3
- 1南京理工大学电子工程与光电技术学院, 江苏 南京 210094
- 2江苏省中医院, 江苏 南京 210029
- 3金陵科技学院视光工程系, 江苏 南京 211169
Aiming at the individual differences of human eye, it is important to establish a lens optical model that is consistent to human eye data in China and implement the corresponding digital processing technology. According to the three-dimensional(3D) digital model of the lens, 3D printing technology can print the lens model with simple steps and low cost. Based on the measured corneal parameters, intraocular distances, refractive index of each medium, and eye aberration, the lens optical model is reconstructed. We establish a 1 mm-thick gradient refractive index lens model with polymethylmethacrylate (PMMA) and polylactic acid (PLA) as materials, and a 1 mm-thick single refractive index lens model with photosensitive resin as the material. The single refractive index lens model is printed by stereo lithography appearance (SLA) technology and the gradient refractive index lens model is printed by fused deposition molding (FDM) technology. The results show that the gradient refractive index lens model printed by FDM technology has serious step effects. The single refractive index lens model printed by SLA technology has a stress of 87.9 nm/mm. The difference between the focal length of the lens model and the theoretical value is 4.98% and the roughness of the surface is about 120 nm.
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