Results 31 to 40 of about 3,235,809 (264)

Determination of Optic Axes by Corneal Topography among Italian, Brazilian, and Chinese Populations

Photonics, 2021
This study aims to describe a new universal method to identify the relative three-dimensional directions of visual, pupillary, and optical axes of the eye and the angles between them using topography elevation data.
Bernardo T. Lopes, Ashkan Eliasy, Mohamed Elhalwagy, Riccardo Vinciguerra, Fangjun Bao, Paolo Vinciguerra, Renato Ambrósio, Ahmed Elsheikh, Ahmed Abass   +8 more
doaj   +1 more source

Angle Kappa measurement pre-keratorefractive and post-keratorefractive surgery using Orbscan 3

Journal of the Egyptian Ophthalmological Society, 2022
Aim of the study Measurement of the mean angle Kappa pre-keratorefractive and post-keratorefractive surgery utilizing Orbscan 3. Patients and methods This retrospective study was conducted on patients who had refractive surgeries, group A included ...
Rania G.E Zaki, Hesham M Gharieb, Ihab S Othman   +2 more
doaj   +1 more source

The effect of different angle kappa on higher-order aberrations after small incision lenticule extraction

Lasers in Medical Science, 2023
This study aimed to compare higher-order aberrations (HOAs) after small incision lenticule extraction (SMILE) in patients with different angle kappa.
Luan Guo, Zixuan Cheng, Xiangmei Kong, Zhaoxia Huang, Xue Xu, Jinchuan Wu, Hongbin Lv   +6 more
semanticscholar   +1 more source

Correlation of angle kappa with biometry and higher-order aberrations of cataract patients at Prof. Ngoerah Hospital Ophthalmology Clinic

Universa Medicina, 2023
Background Advancements in ophthalmic surgery now hinge on intricate interplays among ocular parameters. Angle kappa, measuring deviation between visual and pupillary axes, is crucial, especially in refractive procedures with multifocal intraocular ...
Siska Siska, I Gusti Ayu Ratna Suryaningrum, Saphira Evani   +2 more
doaj   +1 more source

Angle Kappa agreement between Scheimpflug tomography, combined placido Scheimpflug and combined slit scanning placido systems

International ophtalmology, 2022
Purpose To compare the measured or calculated angle Kappa using Oculus pentacam HR, Sirius and Orbscan III devices. Patients and methods A prospective randomized cohort study, conducted on 47 eyes of 47 healthy orthotropic individuals, with an age range ...
Mo'mena Ahmad A. Awad-Allah, H. Gharieb, R. G. Zaki, I. Othman   +3 more
semanticscholar   +1 more source

Dynamic distribution and correlation analysis of the angle kappa in myopia patients undergoing femtosecond-assisted laser in situ keratomileusis

Medicine, 2022
Purpose: To explore the offset distribution of pupillary centres, the offset between the pupil centre and the coaxially sighted corneal light reflex (P-Dist) and their correlation in femtosecond laser combined with excimer laser in situ keratomileusis ...
W. Deng, Yuxin Fang, Shuhua Lin, Ying-Jun Li   +3 more
semanticscholar   +1 more source

AUTOMATIC KAPPA ANGLE ESTIMATION FOR AIR PHOTOS BASED ON PHASE ONLY CORRELATION [PDF]

The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2016
The approximate value of exterior orientation parameters is needed for air photo bundle adjustment. Usually the air borne GPS/IMU can provide the initial value for the camera position and attitude angle.
Z. Xiong, D. Stanley, Y. Xin
doaj   +1 more source

Distribution of preoperative angle alpha and angle kappa values in patients undergoing multifocal refractive lens surgery based on a positive contact lens test

Graefe's Archive for Clinical and Experimental Ophthalmology, 2021
Purpose To assess the preoperative objective angle alpha and angle kappa measurements of patients deciding to undergo multifocal refractive lens surgery based on a subjective positive multifocal contact lens test (MCLT).
P. Baenninger, J. Rinert, L. Bachmann, K. Iselin, F. Sanak, O. Pfaeffli, C. Kaufmann, M. Thiel   +7 more
semanticscholar   +1 more source

Comparative Analysis of Physiological Vergence Angle Calculations from Objective Measurements of Gaze Position

Sensors
Eccentric photorefractometry is widely used to measure eye refraction, accommodation, gaze position, and pupil size. While the individual calibration of refraction and accommodation data has been extensively studied, gaze measurements have received less ...
Linda Krauze, Karola Panke, Gunta Krumina, Tatjana Pladere   +3 more
doaj   +1 more source

A Study Validating the Estimation of Anterior Chamber Depth and Iridocorneal Angle with Portable and Non-Portable Slit-Lamp Microscopy

Sensors, 2021
This study assessed the anterior chamber depth (ACD) and iridocorneal angle using a portable smart eye camera (SEC) compared to the conventional slit-lamp microscope and anterior-segment optical coherence tomography (AS-OCT).
Eisuke Shimizu, Hiroyuki Yazu, Naohiko Aketa, Ryota Yokoiwa, Shinri Sato, Junichiro Yajima, Taiichiro Katayama, Rio Sato, Makoto Tanji, Yasunori Sato, Yoko Ogawa, Kazuo Tsubota   +11 more
doaj   +1 more source