The purpose of this work was to evaluate peripheral image quality in the pseudophakic eye using computational, physical and psychophysical methods. We designed and constructed a physical model of the pseudophakic human eye with realistic dimensions using a corneal phantom and a board-only camera that was pivoted around an axis that matched the anatomical centre of a human retina, assuming a radius of curvature of 12 mm, while it was submersed in a 23.4mm long water filled chamber to emulate human ocular axial length. We used this optical setup to perform direct recording of the point spread function (PSF) and the associated retinal images for a commercial intraocular lens (IOL). Additionally, psychophysical tests were carried out to investigate the impact of the off-axis astigmatism in peripheral visual performance, where spectacle-induced astigmatism simulated the pseudophakic conditions in healthy subjects. Our findings using the physical eye model confirm the existence of large amounts of astigmatism in the periphery of the pseudophakic eye. The psychophysical tests revealed a significant reduction of detection sensitivity in the peripheral visual field. The latter suggests that off-axis astigmatism in patients implanted with IOLs may have performance and safety implications for activities requiring efficient peripheral vision.
Dr. Dimitrios Christaras from the Research Department of the Athens Eye Hospital received the prestigious Marie Skłodowska-Curie Individual Fellowship. He will be funded for two years to develop, under the supervision of Dr. Harilaos Ginis, an instrument for fast assessment of peripheral refractive errors and image quality. The project with the acronym IRWAVE will also involve Prof. Linda Lundstrom from KTH Royal Institute of Technology in Stockholm and Prof. Christos Bergeles from King’s College London.
HOYA Surgical Optics (Singapore) is Sponsoring one 6-month internship/fellowship (MSc Level) in Athens Eye Hospital / Department of Research, starting January 2020. Topic: In-vitro evaluation of IOL Optical performance. Contact us to apply. (h.ginis -at- athenseyehospital.gr)
The Athens Eye Hospital has joined the Hellenic BioCluster (HBio) and it is now part of the one of the fist bioscience cluster in Greece. The HBio consists of 44 members, from the Academic sector and the Industry and its aim is to boost the development of the Life Sciences industry in Greece, to promote the Greek Life Sciences sector in the international scene and to facilitate business and research collaborations between local and international companies and research groups. More on the HBio cluster here.
The Research Department of the Athens Eye Hospital along with the Laboratorio de Optica, Universidad de Murcia, joined forces for a H2020 funded project on the development of a portable instrument for the measurement of the optical density of Macular Pigment. The project was chosen by the Attract call along with 170 breakthrough ideas from all over Europe. More on the project here. A short video with an overview of our project, explained by the Head of Department Dr. Harilaos Ginis can been seen below.