Clinical trials: Myopic Astigmatism
Cataract, Pseudophakia
Evaluation Study for a Non-Contact Biometer
The purpose of this study is to determine whether a new non-contact biometer, is as accurate as the the available gold-standard.
- Conditions
- Cataract, Pseudophakia, Myopia, Hyperopia
- Trial name
- NCT00494390
- Where
- Switzerland
- Volunteers
- 95 people, healthy volunteers welcome
- Sponsor
- Insel Gruppe AG, University Hospital Bern
Myopia, Hyperopia
Clinical Investigation of the Vision-R800 Device.
Randomized, bilateral, cross-over dispensing study of a standard and VR800 refraction and associated spectacle lenses.
- Conditions
- Myopia, Hyperopia, Astigmatism, Presbyopia
- Trial name
- NCT04208750
- Testing
- Vision R-800 Phoropter, Standard Phoropter
- Where
- United States
- Volunteers
- 119 people, healthy volunteers welcome
- Sponsor
- Pete Kollbaum, OD, PhD
Myopia, Astigmatism
A Comparison of LASIK Outcomes Using Two Femtosecond Lasers
Comparing LASIK outcomes using two femtosecond lasers
- Trial name
- NCT03063164
- Testing
- Intralase IFS150, Visumax
- Where
- United States
- Volunteers
- 7 people, healthy volunteers welcome
- Sponsor
- Edward E. Manche
Myopia
Evaluation of Conventional Photorefractive Keratectomy (PRK) in U.S. Army Personnel, Substudy of: Initial Evaluation of Excimer Laser Keratorefractive Surgery in U.S. Army Personnel
The purpose of this study is to: 1. evaluate the safety and efficacy of conventional PRK in U.S. Army personnel who have naturally occurring myopia with or without astigmatism. 2.
- Trial name
- NCT00412568
- Testing
- Photorefractive Keratectomy (PRK)
- Where
- United States
- Volunteers
- 150 people, healthy volunteers welcome
- Sponsor
- Walter Reed Army Medical Center
Myopia, Myopic Astigmatism
Optical Quality, Threshold Target Identification, and Military Target Task Performance After Advanced Keratorefractive Surgery
To determine the effect of two types of wavefront modalities (WFG vs. WFO) and two types of refractive surgery (PRK vs. LASIK) on visual and military task performance after laser refractive surgery.
- Trial name
- NCT01097525
- Testing
- WFG PRK, WFG LASIK, WFO PRK
- Where
- 2 sites in United States
- Volunteers
- 224 people, healthy volunteers welcome
- Sponsor
- Fort Belvoir Community Hospital
Refractive Errors, Astigmatism
EyeQue VisionCheck 510(k) Clinical Trial
Demonstrate that refraction measurements from the device agree with refraction measurements from a phoropter within clinically meaningful limits.
- Trial name
- NCT06044688
- Testing
- EyeQue VisionCheck, Phoropter
- Volunteers
- 156 people, healthy volunteers welcome
- Sponsor
- EyeQue Corp.
Myopia, Astigmatism
KLEx Versus FS-LASIK for the Treatment of Myopia and Compound Myopic Astigmatism
FemtoLASIK is a type of laser eye surgery used to correct vision problems such as nearsightedness, farsightedness, and astigmatism. It involves two main steps: creating a flap and reshaping the cornea.
- Conditions
- Myopia, Astigmatism, Myopic Astigmatism
- Trial name
- NCT06477081
- Testing
- FS-LASIK procedure, KLEx
- Where
- Mexico
- Volunteers
- 80 people, healthy volunteers welcome
- Sponsor
- Instituto de Oftalmología Fundación Conde de Valenciana
Myopia, Astigmatism
Early Changes Among FLEx, LASIK and FS-LASIK
To evaluate the short-term changes in ocular surface measures and tear inflammatory mediators after lenticule extraction (FLEx), laser in situ keratomileusis (LASIK) and femtosecond laser-assisted laser in situ keratomileusis…
- Trial name
- NCT02551796
- Testing
- lenticule extraction, laser in situ keratomileusis, FS assisted laser in situ keratomileusis
- Where
- China
- Volunteers
- 75 people, healthy volunteers welcome
- Sponsor
- Sun Yat-sen University
Myopia, Myopia; Astigmatism
Assessment of IOP After Corneal Refractive Surgery Based on AI
Significance, Background, and Current Status Studies show the global average prevalence of myopia is 22%, with hyperopia incidence being similar.
- Conditions
- Myopia, Myopia; Astigmatism, Refractive Surgery, Intraocular Pressure Changes
- Trial name
- AIOP-CRS-AI (NCT07544615)
- Where
- China
- Volunteers
- 10,030 people, healthy volunteers welcome
- Sponsor
- Tianjin Eye Hospital
Myopia, Hyperopia
Evaluation of Effectiveness of Correcting Refractive Error With Ready-made Spectacles
This research project will compare two methods of correcting refractive error (long or short-sightedness) with spectacle lenses.
- Conditions
- Myopia, Hyperopia, Astigmatism
- Trial name
- RECS (NCT00657670)
- Testing
- Ready-made spectacles, Spectacles
- Where
- 2 sites in China, India
- Volunteers
- 800 people, healthy volunteers welcome
- Sponsor
- Johns Hopkins University
Myopia
Initial Evaluation of Photorefractive Keratectomy in U.S. Army Personnel
The objective of this study is to conduct a prospective clinical trial to evaluate the safety and efficacy fo the VISX Excimer Laser system for the treatment of naturally occurring low to moderate myopia, with or without low…
- Trial name
- NCT00413673
- Testing
- PRK
- Where
- United States
- Volunteers
- 100 people, healthy volunteers welcome
- Sponsor
- Walter Reed Army Medical Center
Ocular Surface Disease, Irregular Astigmatism
Evaluation of the Safety and Efficacy of Rigid Breathable Scleral Contact Lenses for the Correction of Ametropia
To evaluate the short-term efficacy and safety of scleral contact lens in the clinical treatment of patients with irregular astigmatism after corneal transplantation by analyzing ocular parameters and ocular surface conditions of…
- Conditions
- Ocular Surface Disease, Irregular Astigmatism, Contact Lens Complication, Corneal Astigmatism
- Trial name
- NCT06256770
- Where
- China
- Volunteers
- 176 people, healthy volunteers welcome
- Sponsor
- Tianjin Eye Hospital
Refractive Error - Myopia Axial, Astigmatism
Refractive Accuracy of "2WIN" and Portable Autorefractors
Youth and some adults have photoscreening refractions and hand-held auto refraction before cycloplegia refraction during new and follow up eye examinations.
- Conditions
- Refractive Error - Myopia Axial, Astigmatism, Accomodation, Visual Impairment
- Trial name
- NCT04249505
- Testing
- "2WIN" Photoscreener, "Plusoptix A12", "Retinomax"
- Where
- United States
- Volunteers
- 708 people, healthy volunteers welcome
- Sponsor
- Alaska Blind Child Discovery
Refractive Errors
Study to Evaluate the Safety and Efficacy of HI-BRITE Large Diameter Rigid Gas Permeable Contact Lens
Study to evaluate the safety and efficacy of HI-BRITE large diameter rigid gas permeable contact lens (hexafocon b) test when worn on a daily wear basis in the correction of myopia/hyperopia/astigmatism/presbyopia/ and irregular…
- Trial name
- NCT02812316
- Testing
- HI-BRITE Large Diameter Rigid Gas Permeable Contact Lens
- Where
- Taiwan
- Volunteers
- 136 people, healthy volunteers welcome
- Sponsor
- Taipei Medical University Hospital
Myopia, Astigmatism
Randomized, Prospective Comparison of the Outcome of Toric Implantable Contact Lens (TICL) and Q-LASIK for the Correction of Myopia With Astigmatism
The objective is to conduct a contralateral prospective clinical study to compare the safety, efficacy, and quality of vision of the STAAR Surgical Co.
- Trial name
- NCT01088568
- Testing
- the implantation of toric implantable collamer lens, customized laser-assisted in situ keratomileusis
- Where
- China
- Volunteers
- 30 people, healthy volunteers welcome
- Sponsor
- Wenzhou Medical University
Myopia, Hyperopia
Evaluation of Silicone Hydrogel Daily Wear Contact Lenses for Up to One (1) Month of Daily Wear
The aim of the study is to evaluate if the performance of Invigor A is substantially equivalent to Invigor B contact lenses when used in a one month recommended replacement, daily wear modality.
- Conditions
- Myopia, Hyperopia, Astigmatism
- Trial name
- NCT03722784
- Testing
- Invigor A (test), Invigor B (control)
- Where
- 6 sites in United States
- Volunteers
- 88 people, healthy volunteers welcome
- Sponsor
- CooperVision, Inc.
Myopia, Hyperopia
A Clinical Evaluation of a Phakic Intraocular Lens
The objective of this study is to evaluate the clinical performance of the STAAR EVO+ Visian™ Implantable Collamer® Lens with Aspheric (EDOF) Optic as refractive elements to correct or reduce myopia or hyperopia with presbyopia…
- Conditions
- Myopia, Hyperopia, Astigmatism, Presbyopia
- Trial name
- NCT07291739
- Testing
- Implantable Collamer Lens (ICL)
- Where
- Philippines
- Volunteers
- 47 people, healthy volunteers welcome
- Sponsor
- Staar Surgical Company
Keratomileusis, Laser In Situ
The Role of Psychosocial and Other Quality of Life Parameters in Evaluating Functional Changes Prior to and Following Laser In-situ Keratomileusis (LASIK)Changes Laser In-situ Keratomileusis (LASIK)
To evaluate the changes in quality of life parameters after LASIK surgery.
- Trial name
- NCT00344604
- Testing
- Role of psychosocial and quality of life parameters prior to and following LASIK.
- Where
- United States
- Volunteers
- healthy volunteers welcome
- Sponsor
- University of Texas Southwestern Medical Center
Presbyopia
Bifocal Contact Lens Study for Adults With Age-Related Near Vision Loss
The primary objective of this study is to evaluate the distance, intermediate and near visual performance of Clerio designed single vision and Clerio designed LIRIC modified bifocal lenses (+2.00D add) compared to commercially…
- Trial name
- NCT03653715
- Testing
- Clerio Vision LIRIC-modified Bifocal Contact Lens, Johnson & Johnson 1-Day Acuvue Moist Multifocal Contact Lens, Johnson & Johnson 1-Day Acuvue Moist Contact Lens
- Where
- United States
- Volunteers
- 30 people, healthy volunteers welcome
- Sponsor
- Clerio Vision, Inc.
Myopia, Astigmatism
Changes Between Lenticule Extraction and Femtosecond Laser-assisted Laser in Situ Keratomileusis
The aim is to evaluate the short-term changes in ocular surface measures and tear inflammatory mediators after lenticule extraction (FLEx) and femtosecond laser-assisted laser in situ keratomileusis (FS-LASIK) procedures.
- Trial name
- NCT02550353
- Testing
- lenticule extraction, femtosecond laser-assisted laser in situ keratomileusis
- Where
- China
- Volunteers
- 75 people, healthy volunteers welcome
- Sponsor
- Sun Yat-sen University