ISSN : 1229-6457(Print)
ISSN : 2466-040X(Online)
ISSN : 2466-040X(Online)
The Korean Journal of Vision Science Vol.27 No.3 pp.167-181
DOI : https://doi.org/10.17337/JMBI.2025.27.3.167
DOI : https://doi.org/10.17337/JMBI.2025.27.3.167
Investigation of Chromatic Aberration Induced by Decentered Myopia Correction Lenses
Abstract
Purpose : This study investigates the chromatic aberration induced by decentered corrective lenses for myopia.
Methods : Using the exact law of refraction without paraxial approximation, ray tracing simulations were performed to evaluate the focal lengths and optical powers corresponding to wavelengths of 486.1 nm, 589.3 nm, and 656.3 nm. Furthermore, the 3D Gullstrand schematic eye model was employed to simulate the retinal image formation of the Snellen letter E, at different wavelengths, allowing for a comprehensive comparison of the wavelength-dependent image shifts and distortions.
Results : As the decentration from the on-axis ray increases, the focal length decreases. This is mainly due to the increase in the prism diopter at the periphery of the corrective lens. In addition, as the decentration increases, the lateral decentration distance also increases. The off-axis ray shows a relatively complex pattern because it has a prismatic effect itself, and the prismatic effect due to decentration occurs simulatneously. In the case of the off-axis ray, the focal length increases, and the refractive power shows the opposite trend, while the lateral decentration distance increases with the focal length. The resolution of the retinal image was high on the retina, due to the corrective lens, and it was confirmed to be the highest in the yellow wavelength. There was a slight decrease in resolution when decentration occurred.
Conclusion : Our findings provide insights into the impact of lens decentration on chromatic aberration and its implications for visual performance.
Methods : Using the exact law of refraction without paraxial approximation, ray tracing simulations were performed to evaluate the focal lengths and optical powers corresponding to wavelengths of 486.1 nm, 589.3 nm, and 656.3 nm. Furthermore, the 3D Gullstrand schematic eye model was employed to simulate the retinal image formation of the Snellen letter E, at different wavelengths, allowing for a comprehensive comparison of the wavelength-dependent image shifts and distortions.
Results : As the decentration from the on-axis ray increases, the focal length decreases. This is mainly due to the increase in the prism diopter at the periphery of the corrective lens. In addition, as the decentration increases, the lateral decentration distance also increases. The off-axis ray shows a relatively complex pattern because it has a prismatic effect itself, and the prismatic effect due to decentration occurs simulatneously. In the case of the off-axis ray, the focal length increases, and the refractive power shows the opposite trend, while the lateral decentration distance increases with the focal length. The resolution of the retinal image was high on the retina, due to the corrective lens, and it was confirmed to be the highest in the yellow wavelength. There was a slight decrease in resolution when decentration occurred.
Conclusion : Our findings provide insights into the impact of lens decentration on chromatic aberration and its implications for visual performance.