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KMID : 1159320210230030259
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Korean Journal of Vision Science
2021 Volume.23 No. 3 p.259 ~ p.269
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Theoretical Analysis of the Gullstrand Schematic Eye through Numerical Equations
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Lee Myoung-Hee
Kim Young-Chul
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Abstract
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Purpose : The optical characteristics (focal length, spherical aberration, and depth of focus) were analyzed in the Gullstrand schematic eye model through numerical analysis.
Methods : The Modified Gullstrand schematic eye model (anterior and posterior cornea, crystalline lens cortex, and crystalline lens nucleolus, respectively) with corrected optical constant values (aqueous humor) was used. The optical characteristics of the eye according to Snell's law without paraxial approximation were numerically analyzed when parallel rays were incident.
Results : All the parallel rays incident into the eye model showed nonlinear decreases, increases and decreases in focal length, spherical aberration, and depth of focus, respectively, as the incident height increased. moreover, It was consistent with the results of the Gullstrand schematic eye model to which the commonly known paraxial approximation was applied.
Conclusion : It was possible to numerically analyze the optical characteristics of the eye, which are inevitably limited to bio-metric analysis, without paraxial approximation. Based on this, it is decided that the optical phenomena of various eyes can be understood.
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KEYWORD
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Depth of focus, Focal length, Gullstrand schematic eye, Spherical aberration
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