Abstract
The paper discusses the abilities of the light sword optical element (LSOE) for presbyopia compensation. The imaging properties are analyzed by means of the modulation transfer functions and output images of the star resolution test. All numerical calculations are performed assuming an optical set-up simulating the presbyopic human eye with 3 mm pupil acting on-axis and based on the Gullstrand model. In order to have a meaningful comparison we expand our study and present adequate analysis for other elements potentially useful in ophthalmology as reading glasses, bifocal lenses and axicons. According to the obtained results the LSOE can successfully realize vision with an extended depth of field. Under assumed conditions the element makes possible the compensation of an assumed defocus up to 4 dioptres. The output images formed by the LSOE are well recognizable and have acceptable qualities for near as well as far object distances.
Highlights
Presbyopia is probably the most common defect of the aging human eye
Among various proposals the light sword optical element (LSOE) [5] was recently studied as a promising alternative and it was shown that its Strehl ratio shows a significant superiority in terms of uniformity within the prescribed range of optical power to be covered comparing with other optical elements designed especially for presbyopia compensation [6]
The performed simulations prove that the LSOE and the Additive light sword optical element (aLSOE) exhibit better abilities for extended depth of field (EDOF) imaging in ophthalmical applications than other hitherto known solutions
Summary
Presbyopia is probably the most common defect of the aging human eye. The majority of the population suffers this inconvenience. Among various proposals the light sword optical element (LSOE) [5] was recently studied as a promising alternative and it was shown that its Strehl ratio shows a significant superiority in terms of uniformity within the prescribed range of optical power to be covered comparing with other optical elements designed especially for presbyopia compensation [6]. This work presents results based on the analysis of modulation transfer functions (MTFs) and images of the star resolution test (Siemens star). This approach enables to estimate the contrast transfer and the quality of the output images depending on the structure of the input objects. Besides the LSOE we analyze for comparison the imaging properties of a bifocal lens and an inverse quartic axicon
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