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19 September 2017 The relationship between the retinal image quality and the refractive index of defects arising in IOL: numerical analysis
Malwina Geniusz
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Proceedings Volume 10396, Applications of Digital Image Processing XL; 1039631 (2017) https://doi.org/10.1117/12.2274337
Event: SPIE Optical Engineering + Applications, 2017, San Diego, California, United States
Abstract
The best treatment for cataract patients, which allows to restore clear vision is implanting an artificial intraocular lens (IOL). The image quality of the lens has a significant impact on the quality of patient’s vision. After a long exposure the implant to aqueous environment some defects appear in the artificial lenses. The defects generated in the IOL have different refractive indices. For example, glistening phenomenon is based on light scattering on the oval microvacuoles filled with an aqueous humor which refractive index value is about 1.34. Calcium deposits are another example of lens defects and they can be characterized by the refractive index 1.63. In the presented studies it was calculated how the difference between the refractive indices of the defect and the refractive index of the lens material affects the quality of image. The OpticStudio Professional program (from Radiant Zemax, LLC) was used for the construction of the numerical model of the eye with IOL and to calculate the characteristics of the retinal image. Retinal image quality was described in such characteristics as Point Spread Function (PSF) and the Optical Transfer Function with amplitude and phase. The results show a strong correlation between the refractive indices difference and retinal image quality.
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Malwina Geniusz "The relationship between the retinal image quality and the refractive index of defects arising in IOL: numerical analysis", Proc. SPIE 10396, Applications of Digital Image Processing XL, 1039631 (19 September 2017); https://doi.org/10.1117/12.2274337
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KEYWORDS
Image quality
Refractive index
Point spread functions
Eye
Eye models
Image analysis
Light scattering
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