Clinical trials: Wavefront Aberration, Corneal
Myopia
Corneal WFG Versus AF Trans PRK in Myopic Patients With High Corneal HOA
compare the efficacy, safety and predictability of corneal wavefront guided (WFG) and aberration free ablation in single-step transepithelial photorefractive keratectomy (TransPRK) in myopic patients with high pre-existing…
- Trial name
- NCT03786861
- Testing
- corneal WFG group, aberration free group
- Volunteers
- 33 people, healthy volunteers welcome
- Sponsor
- Menoufia University
Corneal Wavefront Aberration, Refractive Errors
Factors Influencing Subjective Visual Quality in Human Eyes
To assess subjective visual symptoms using the QoV questionnaire, measure pupil size using the Atongmu Pupillometer, measure wavefront aberrations using the OPD-Scan III Aberrometer, and measure/calculate the effective optical…
- Trial name
- NCT07518316
- Testing
- Corneal Refractive Surgery
- Volunteers
- 300 people
- Sponsor
- Tianjin Eye Hospital
Refractive Errors, Axial Length, Eye
Optical Biometry and Spherical Aberration in Ametropic and Emmetropic Eyes
Aberrations play a significant role in the visual process and can be divided in lower-order and higher-order aberrations. The former can be measured using the commercially available IOL Master (Carl Zeiss Meditec AG, Germany) and…
- Conditions
- Refractive Errors, Axial Length, Eye, Corneal Wavefront Aberration
- Trial name
- NCT01663597
- Where
- Austria
- Volunteers
- 160 people, healthy volunteers welcome
- Sponsor
- Medical University of Vienna
Wavefront Aberration, Corneal, Refractive Errors
Digital Wavefront Sensing
A holographic optical coherence tomography (H-OCT) setup is used to detect the wavefront by means of phase reconstruction.
- Trial name
- DWS (NCT04597255)
- Testing
- Holographic optical coherence tomography
- Volunteers
- 30 people, healthy volunteers welcome
- Sponsor
- Medical University of Vienna
Corneal Wavefront Aberration, SARS-CoV-2
Changes of Optical Quality During the Peak of the Covid-19 Pandemic
To explore whether cornea structure, and optical quality are affected by the covid-19 infection.
- Trial name
- NCT05882383
- Where
- China
- Volunteers
- 110 people, healthy volunteers welcome
- Sponsor
- Tianjin Eye Hospital
Glaucoma, Suspect, Aberration, Corneal Wavefront
Ocular Changes With Alpha-2 Receptor Agonist.
selective alpha-2 receptor agonists cause changes in intraocular pressure and pupillary size thus may affect patient quality of life.
- Trial name
- NCT05670015
- Testing
- Low dosage selective alpha-2 receptor agonists topical eyedrop, High dosage selective alpha-2 receptor agonists topical eyedrop
- Where
- Egypt
- Volunteers
- 150 people
- Sponsor
- Benha University
Corneal Wavefront Aberration
Higher Order Aberration and Relationship With Soft Contact Lens Modulus
Higher order aberrations are imperfects in the eye that affect the quality of image projected onto the retina. Soft contact lenses are made of different materials with different stiffness.
- Trial name
- NCT06425432
- Testing
- OVITZ xwave aberrometer
- Volunteers
- 100 people, healthy volunteers welcome
- Sponsor
- Southern College of Optometry
Keratoconus, Irregular Astigmatism
Wavefront Guided Scleral Lenses for Keratoconus and Irregular Astigmatism
Aberrations are the spreading of light from a point focus. Aberrations of the eyes can be objectively evaluated with a wavefront aberrometer.
- Conditions
- Keratoconus, Irregular Astigmatism, Corneal Ectasia, Aberration, Corneal Wavefront
- Trial name
- WFG Sclerals (NCT04698590)
- Testing
- Wavefront Guided Scleral Lenses, Traditional Scleral Lenses
- Where
- United States
- Volunteers
- 100 people, healthy volunteers welcome
- Sponsor
- Cornea and Laser Eye Institute
Aberration, Corneal Wavefront
Immediate Effects of Lipid-Based and Non-Lipid Artificial Tears on Corneal Aberrations
This study evaluates the immediate effects of two types of artificial tear formulations on corneal aberrations in a healthy population.
- Trial name
- ILEACT (NCT06784661)
- Testing
- Lipid-Based Artificial Tear, Non-Lipid Artificial Tear
- Where
- Portugal
- Volunteers
- 40 people, healthy volunteers welcome
- Sponsor
- University of Seville
Aberration, Corneal Wavefront
Correlation of Angle Kappa , Corneal High Order Aberrations and Total Eye Aberrations in Various Refractive Errors
Identification of the correlation between angle kappa , corneal high order aberrations and total eye aberrations in myopic hyperopic and astigmatic patients
- Trial name
- NCT05741190
- Testing
- Pentacam Imaging
- Volunteers
- 100 people, healthy volunteers welcome
- Sponsor
- Sohag University
Accommodation Disorder, Keratoconus
Clinical Investigation for a Multifunction Ophthalmic Measurement Device
The purpose of this clinical investigation is to evaluate the clinical utility of a multifunctional measuring device for Ophtalmology.
- Conditions
- Accommodation Disorder, Keratoconus, Dry Eye, Refractive Errors
- Trial name
- NCT06565091
- Testing
- Measurements of physiological parameters of the anterior chamber, Measurements of the Axial biometry
- Where
- France
- Volunteers
- 378 people, healthy volunteers welcome
- Sponsor
- Essilor International
Refractive Errors, Aberration, Corneal Wavefront
Chromatic and Monochromatic Optical Aberrations After Corneal Refractive Surgery
Refractive surgeries can be divided into two distinct categories: 1) corneal surgeries (superficial and deep procedures) carried on the surface of the eye and 2) lens surgeries (phakic IOL, refractive lens exchange) - an…
- Trial name
- NCT03893838
- Where
- Poland
- Volunteers
- 100 people, healthy volunteers welcome
- Sponsor
- Wrocław University of Science and Technology
Pseudophakia, Accomodation
Monofocal Extended Range of Vision (MERoV) Study
The investigators are proposing this research project to: 1. Screen a set of patients after normal cataract surgery with a single focus lens aimed at good distance vision at 3 months after surgery to identify patients who are…
- Conditions
- Pseudophakia, Accomodation, Aberration, Corneal Wavefront
- Trial name
- MERoV (NCT04011696)
- Where
- United Kingdom
- Volunteers
- 412 people
- Sponsor
- Brighton and Sussex University Hospitals NHS Trust