Research Project: Holographic Vision Simulator for Cataract Surgery
Loading...
Contributors
Funders
ID
EC.00125
Authors
Ürey, Hakan
Faculty Member
Publications
Applications of augmented reality in ophthalmology [invited]
(Optical Society of America (OSA), 2021) Aydındoğan, Güneş; Kavaklı, Koray; Şahin, Afsun; Ürey, Hakan; Artal, Pablo; Department of Electrical and Electronics Engineering; Department of Physics; Graduate School of Sciences and Engineering; KUTTAM (Koç University Research Center for Translational Medicine); School of Medicine; Yes; College of Engineering; College of Sciences; GRADUATE SCHOOL OF SCIENCES AND ENGINEERING; Research Center; SCHOOL OF MEDICINE
Throughout the last decade, augmented reality (AR) head-mounted displays (HMDs) have gradually become a substantial part of modern life, with increasing applications ranging from gaming and driver assistance to medical training. Owing to the tremendous progress in miniaturized displays, cameras, and sensors, HMDs are now used for the diagnosis, treatment, and follow-up of several eye diseases. In this review, we discuss the current state-of-the-art as well as potential uses of AR in ophthalmology. This review includes the following topics: (i) underlying optical technologies, displays and trackers, holography, and adaptive optics; (ii) accommodation, 3D vision, and related problems such as presbyopia, amblyopia, strabismus, and refractive errors; (iii) AR technologies in lens and corneal disorders, in particular cataract and keratoconus; (iv) AR technologies in retinal disorders including age-related macular degeneration (AMD), glaucoma, color blindness, and vision simulators developed for other types of low-vision patients.
Pupil steering holographic display for pre-operative vision screening of cataracts
(Optica Publishing Group, 2021) Aydındoğan, Güneş; Hasanreisoğlu, Murat; Kavaklı, Koray; Kesim, Cem; Şahin, Afsun; Ürey, Hakan; Ulusoy, Erdem; Department of Electrical and Electronics Engineering; Graduate School of Sciences and Engineering; KUH (Koç University Hospital); KUTTAM (Koç University Research Center for Translational Medicine); School of Medicine; Yes; College of Engineering; GRADUATE SCHOOL OF SCIENCES AND ENGINEERING; KUH (KOÇ UNIVERSITY HOSPITAL); Research Center; SCHOOL OF MEDICINE
Cataract is the most common cause of preventable blindness and vision loss where the only treatment is surgical replacement of the natural lens with an intraocular lens. Computergenerated holography (CGH) enables to control phase, size, and shape of the light beam entering through the eye-pupil. We developed a holographic vision simulator to assess visual acuity for patients to experience the postoperative corrected vision before going through surgery. A holographically shaped light beam is directed onto the retina using small non-cataractous regions of the lens with the help of a pupil tracker. A Snellen chart hologram is shown to subjects at desired depth with myopia and hyperopia correction. Tests with 13 patients demonstrated substantial improvements in visual acuity and the simulator results are consistent with the post-operative vision tests. Holographic simulator overperforms the existing vision simulators, which are limited to static pinhole exit pupils and incapable of correcting aberrations.
