title: High resolution iridocorneal angle imaging system by axicon lens assisted gonioscopy.
abstract: Direct visualization and assessment of the iridocorneal angle (ICA) region with high resolution is important for the clinical evaluation of glaucoma. However, the current clinical imaging systems for ICA do not provide sufficient structural details due to their poor resolution. The key challenges in achieving high quality ICA imaging are its location in the anterior region of the eye and the occurrence of total internal reflection due to refractive index difference between cornea and air. Here, we report an indirect axicon assisted gonioscopy imaging probe with white light illumination. The illustrated results with this probe shows significantly improved visualization of structures in the ICA including TM region, compared to the current available tools. It could reveal critical details of ICA and expected to aid management by providing information that is complementary to angle photography and gonioscopy.
authors.affiliation: School of Mechanical and Aerospace Engineering, Nanyang Technological University, Singapore 639798.|Centre for Optical and Laser Engineering, 50 Nanyang Avenue, Singapore 639798.
authors.forename: Sandeep Menon
authors.initials: SM
authors.lastname: Perinchery
authors.affiliation: School of Mechanical and Aerospace Engineering, Nanyang Technological University, Singapore 639798.|Centre for Optical and Laser Engineering, 50 Nanyang Avenue, Singapore 639798.
authors.forename: Anant
authors.initials: A
authors.lastname: Shinde
authors.affiliation: School of Mechanical and Aerospace Engineering, Nanyang Technological University, Singapore 639798.|Centre for Optical and Laser Engineering, 50 Nanyang Avenue, Singapore 639798.
authors.forename: Chan Yiu
authors.initials: CY
authors.lastname: Fu
authors.affiliation: School of Mechanical and Aerospace Engineering, Nanyang Technological University, Singapore 639798.|Centre for Optical and Laser Engineering, 50 Nanyang Avenue, Singapore 639798.
authors.forename: Xun Jie
authors.initials: XJ
authors.lastname: Jeesmond Hong
authors.affiliation: Singapore Eye Research Institute (SERI) and Singapore National Eye Centre (SNEC), 11 Third Hospital Avenue, Singapore 168751.
authors.forename: Mani
authors.initials: M
authors.lastname: Baskaran
authors.affiliation: Singapore Eye Research Institute (SERI) and Singapore National Eye Centre (SNEC), 11 Third Hospital Avenue, Singapore 168751.|Yong Loo Lin School of Medicine, National University of Singapore (NUS), Singapore 119228.
authors.forename: Tin
authors.initials: T
authors.lastname: Aung
authors.affiliation: School of Mechanical and Aerospace Engineering, Nanyang Technological University, Singapore 639798.|Centre for Optical and Laser Engineering, 50 Nanyang Avenue, Singapore 639798.
authors.forename: Vadakke Matham
authors.initials: VM
authors.lastname: Murukeshan
mesh_terms: D000818:Animals; D003315:Cornea / Q000473:pathology*; D005901:Glaucoma / Q000175:diagnosis; D006068:Gonioscopy / Q000295:instrumentation / Q000379:methods*; D010858:Pigmentation; D013552:Swine; D014129:Trabecular Meshwork / Q000473:pathology