Pupil steering holographic display for pre-operative vision screening of cataracts

Kavaklı, Koray; Aydındoğan, Güneş; Ulusoy, Erdem; Kesim, Cem; Hasanreisoğlu, Murat; Şahin, Afsun; Ürey, Hakan

doi:10.1364/boe.439545

Cited by 10 publications

(6 citation statements)

References 26 publications

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“…The patterned opacification was tested using holography due to its advantage of pinhole display and based on a previous study done by our group [14]. Since the visual acuity was assessed by them utilizing the pinhole display and sending the holographic image through the non-cataract region of the patient's eyes, we wanted to understand how well this method performed by repeating it on our artificially opaque IOL surface.…”

Section: Holography and Patterned Opacificationmentioning

confidence: 99%

Variable and reversible opacification process on IOLs for cataract simulation

Akyazi,

Zolfaghari,

Sahin

et al. 2023

Preprint

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Understanding vision through mild and dense cataracts is important for vision scientists and IOL developers. There have been virtual simulators using VR headsets for subjective evaluation of cataractous vision. However, a physical intraocular lens with variable cataracts for objective evaluation is not available. In this study, we developed a reversible process that can be selectively applied to the whole or parts of an IOL to affect the opacification level. We used our eye model and developed a cataractous lens simulator for progressive levels of opacification, which is achieved by applying a reversible chemical procedure on the intraocular lens surfaces. After the lens is fully or partially immersed in acetone, subsequent testing of the lens in distilled water results in a progressive change in opacification level within minutes. We measured the quality of vision by obtaining modulation transfer function curves, transmission, and spectroscopic measurements at different opacification levels. By simulating variable opacification across the IOLs, we tested how vision changes from less dense to more dense cataractous regions in a holographic display system with programmable small exit pupils. All results were consistent with the expected vision degradation caused by natural opacification.

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Section: Holography and Patterned Opacificationmentioning

confidence: 99%

Variable and reversible opacification process on IOLs for cataract simulation

Akyazi,

Zolfaghari,

Sahin

et al. 2023

Preprint

Self Cite

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show abstract

“…Meanwhile, holographic display is believed to be the ultimate 3D display technology which can provide accommodations by modulating the wavefront of coherent light using spatial light modulators (SLMs) 13 . It also offers unique benefits such as aberration-free high resolution images, per-pixel depth control, vision correction functionality [16][17][18] , as well as large color gamut. Recently, a lot of progress has been made in the field of computer-generated hologram (CGH) rendering, getting more attentions from the industry [19][20][21][22][23][24][25][26][27][28][29][30][31][32][33] .…”

Section: Holographic Displaysmentioning

confidence: 99%

Waveguide Holography: Towards True 3D Holographic Glasses

Jang

Bang

Chae

et al. 2022

Preprint

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We present a novel near-eye display concept which consists of a waveguide combiner, a spatial light modulator, and a laser light source. The proposed system can display true 3D holographic images through see-through pupil-replicating waveguide combiner as well as providing a large eye-box. By modeling the coherent light interaction inside of the waveguide combiner, we demonstrate that the output wavefront from the waveguide can be controlled by modulating the wavefront of input light using a spatial light modulator. This new possibility allows combining a holographic display, which is considered as the ultimate 3D display technology, with the state-of-the-art pupil replicating waveguides, enabling the path towards true 3D holographic augmented reality glasses.

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“…Meanwhile, holographic display technology is believed to be the ultimate 3D display approach, which modulates the wavefront of light using spatial light modulators (SLMs) 7 . It also offers unique benefits such as aberration-free, high-resolution images, per-pixel depth control, ocular parallax depth cues, vision correction functionality 19 – 21 , as well as a large color gamut. Recently, a lot of progress has been made in the field of computer-generated hologram (CGH) rendering, garnering more attention from the industry 22 – 36 .…”

Section: Introductionmentioning

confidence: 99%

Waveguide holography for 3D augmented reality glasses

Jang,

Bang,

Chae

et al. 2024

Nat Commun

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Near-eye displays are fundamental technology in the next generation computing platforms for augmented reality and virtual reality. However, there are remaining challenges to deliver immersive and comfortable visual experiences to users, such as compact form factor, solving vergence-accommodation conflict, and achieving a high resolution with a large eyebox. Here we show a compact holographic near-eye display concept that combines the advantages of waveguide displays and holographic displays to overcome the challenges towards true 3D holographic augmented reality glasses. By modeling the coherent light interactions and propagation via the waveguide combiner, we demonstrate controlling the output wavefront using a spatial light modulator located at the input coupler side. The proposed method enables 3D holographic displays via exit-pupil expanding waveguide combiners, providing a large software-steerable eyebox. It also offers additional advantages such as resolution enhancement capability by suppressing phase discontinuities caused by pupil replication process. We build prototypes to verify the concept with experimental results and conclude the paper with discussion.

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Pupil steering holographic display for pre-operative vision screening of cataracts

Cited by 10 publications

References 26 publications

Variable and reversible opacification process on IOLs for cataract simulation

Variable and reversible opacification process on IOLs for cataract simulation

Waveguide Holography: Towards True 3D Holographic Glasses

Waveguide holography for 3D augmented reality glasses

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