Results 21 to 30 of about 77,514 (194)

A predictive model for early diagnosis of keratoconus

BMC Ophthalmology, 2020
Background The diagnosis of keratoconus in the early stages of the disease is necessary to initiate an early treatment of keratoconus. Furthermore, to avoid possible refractive surgery that could produce ectasias.
Gracia Castro-Luna, Antonio Pérez-Rueda
doaj   +1 more source

On-Eye Measurement of Optical Performance of Rigid Gas Permeable Contact Lenses Based on Ocular and Corneal Aberrometry [PDF]

Optometry and Vision Science, 2003
Our aim was to obtain a complete description of the interactions of rigid gas permeable (RGP) contact lenses with the optics of normal eyes.We measured total and anterior-surface aberrations in four subjects, who were all long-term RGP contact lens wearers.
Dorronsoro, Carlos, Barbero, Sergio, Llorente, Lourdes, Marcos, Susana   +3 more
openaire   +4 more sources

Topography-guided laser in-situ keratomileusis to treat visual distortions due to higher-order aberrations induced after ablation procedures

Indian Journal of Ophthalmology. Case Reports, 2021
A 27-year-old male, with a history of bilateral Laser in situ keratomileusis (LASIK) followed by photorefractive keratectomy, presented with complaints of disturbed quality of vision, the right eye worse than the left eye.
Urvija Choudhary, Ayushi Choudhary, Rajiv Choudhary   +2 more
doaj   +1 more source

Clinical evaluation of toric intraocular lens implantation based on iTrace wavefront keratometric astigmatism

BMC Ophthalmology, 2020
Background Currently, there is no standard technique for determining corneal astigmatism. The iTrace wavefront aberrometry of cornea calculated steep power and axis based on the best Zernike mathematical fit from all topo data within 4 mm circle.
Zhe Zhang, Hui Li, Jing Zhou, Yaqin Zhang, Suhua Zhang   +4 more
doaj   +1 more source

Bull’s eye pattern of aberrometry in anterior lenticonus

Indian Journal of Ophthalmology. Case Reports, 2023
We report an 18-year-old male patient with a progressive diminution of vision in both eyes. On examination, he had bilateral anterior lenticonus and sensorineural hearing loss.
Rishwa Hariyani, Padam Dharani, Senthil Prasad, Kamatchi Nagu, Madhu Shekhar   +4 more
doaj   +1 more source

Comparison of Three Different Devices for the Evaluation of Axial Length, Refractive Error, and Keratometry

Optometry and Vision Science, Volume 100, Issue 8, Page 557-563, August 2023., 2023
SIGNIFICANCE Myopia prevalence is increasing worldwide. Axial length, refractive error, and keratometry are important outcome measures in myopia management. Precise measurement methods are required for myopia management. Various devices are used to measure these three parameters, and it is not known whether their results can be used interchangeably ...
Philipp Hessler, Peter Künzel, Stephan Degle   +2 more
wiley   +1 more source

Evaluation of Anterior and Posterior Corneal Higher Order Aberrations for the Detection of Keratoconus and Suspect Keratoconus

Tomography, 2022
Aim: To investigate the application of anterior and posterior corneal higher-order aberrations (HOAs) in detecting keratoconus (KC) and suspect keratoconus (SKC). Method: A retrospective, case-control study evaluating non-ectatic (normal) eyes, SKC eyes,
Abdelrahman Salman, Obeda Kailani, John Marshall, Marwan Ghabra, Ashraf Armia Balamoun, Taym R. Darwish, Abdul Aziz Badla, Hala Alhaji   +7 more
doaj   +1 more source

iTrace – A Ray Tracing Aberrometer

Delhi Journal of Ophthalmology, 2019
Modern ophthalmology focusses on visual quality and not just visual acuity. The quality of vision is affected by both lower and higher order aberrations.
Ayushi Sinha, Siddhi Goel, Vinay Gupta, Devesh Kumawat, Pranita Sahay   +4 more
doaj   +1 more source

Immediate Postoperative Decentration of a Biologic Corneal Inlay Managed With Tomography-Guided Repositioning: A Case Report. [PDF]

Clin Case Rep
Immediate postoperative Pentacam corneal tomography revealing inferior‐temporal decentration of the biologic corneal inlay on the axial curvature map. ABSTRACT Biologic corneal inlays can rarely present with immediate postoperative decentration, which can be subtle and difficult to detect clinically. Real‐time tomography allows precise early diagnosis,
Beschi G, Rocha G.
europepmc   +2 more sources

Ocular wavefront aberrations in acute central serous chorioretinopathy [PDF]

Journal of Research in Clinical Medicine, 2021
Background: Central serous chorioretinopathy (CSCR) is a condition of choroidal and retinal pathologies that may affect vision, so we assessed vision by the ocular wavefront in the acute form of CSCR. Methods: This cross-sectional study included 21 cases
Banafsheh Kharrazi Ghadim, Nazli Taheri, Mohammad Reza Niyousha   +2 more
doaj   +1 more source