Parameters measurement of rigid gas permeable contact lens based on optical coherence tomography

Dexi Zhu; Meixiao Shen; Yiyu Li

doi:10.1117/12.975631

15 October 2012 Parameters measurement of rigid gas permeable contact lens based on optical coherence tomography

Dexi Zhu, Meixiao Shen, Yiyu Li

Author Affiliations +

Proceedings Volume 8417, 6th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optical Test and Measurement Technology and Equipment; 84171D (2012) https://doi.org/10.1117/12.975631
Event: 6th International Symposium on Advanced Optical Manufacturing and Testing Technologies (AOMATT 2012), 2012, Xiamen, China

Abstract

Spectral domain optical coherence tomography (OCT) was developed in order to measure the geometric parameters of rigid gas permeable (RGP) contact lens. With custom designed OCT system, an ultra-high axial resolution of 3.3 μm in lens was achieved. The OCT image was corrected to eliminate the optical distortion and actual surfaces of lens were shown in contour map. Central thickness, lens diameter, base curve and front surface curvature at optical zone were calculated from the contour map. The results match well with the real values measured by conventional instruments. Our research indicates that OCT can be used to test the RGP lens in a simple and exact way.

Citation Download Citation

Dexi Zhu, Meixiao Shen, and Yiyu Li "Parameters measurement of rigid gas permeable contact lens based on optical coherence tomography", Proc. SPIE 8417, 6th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optical Test and Measurement Technology and Equipment, 84171D (15 October 2012); https://doi.org/10.1117/12.975631

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