refractive errors
Showing 1 - 25 of 146
Anxiety-related Fixation Instability During LASIK
Completed
- Refractive Errors
- Laser in situ keratomileusis (LASIK)
-
Assiut, EgyptTiba Eye Center
Nov 27, 2023
Refractive Errors Trial in Freetown (Eyeglasses, Prescription slip)
Not yet recruiting
- Refractive Errors
- Eyeglasses
- Prescription slip
-
Freetown, Sierra LeoneInnovations for Poverty Action (IPA)
Sep 29, 2023
Refractive Errors, Myopic Astigmatism Trial in Cairo (Small Incision Lenticule Extraction (SMILE))
Recruiting
- Refractive Errors
- Myopic Astigmatism
- Small Incision Lenticule Extraction (SMILE)
-
Cairo, EgyptAl Watany Eye Hospital
Sep 25, 2023
Contact Lens Complication, Astigmatism, Refractive Errors Trial in Pittsburg, Coldwater (TOTAL30 for Astigmatism Contact Lenses)
Not yet recruiting
- Contact Lens Complication
- +2 more
- TOTAL30 for Astigmatism Contact Lenses
-
Pittsburg, Kansas
- +1 more
Sep 18, 2023
Refractive Errors, Astigmatism Trial (EyeQue VisionCheck, Phoropter)
Not yet recruiting
- Refractive Errors
- Astigmatism
- EyeQue VisionCheck
- Phoropter
- (no location specified)
Sep 6, 2023
Refractive Errors Trial in United States (Delefilcon A contact lenses)
Not yet recruiting
- Refractive Errors
- Delefilcon A contact lenses
-
Eden Prairie, Minnesota
- +3 more
Sep 13, 2023
Refractive Errors Trial in Sydney, Athens (UV fs-Laser, IR fs-Laser, LASIK)
Not yet recruiting
- Refractive Errors
- UV fs-Laser
- +2 more
-
Sydney, New South Wales, Australia
- +1 more
Aug 28, 2023
Air Optix® Night and Day® Aqua Continuous Wear
Not yet recruiting
- Refractive Errors
- Lotrafilcon A contact lenses
- Balafilcon A contact lenses
- (no location specified)
Aug 8, 2023
Air Optix® Night and Day® Aqua Daily Wear
Not yet recruiting
- Refractive Errors
- +2 more
- Lotrafilcon A contact lenses
- Balafilcon A contact lenses
-
Fort Worth, TexasContact Alcon Call Center for Trial Locations
Jul 26, 2023
Peripapillary Atrophy to Diagnose Glaucoma in High Myopia
Not yet recruiting
- Myopia
- +4 more
- OCT imaging
-
Guangzhou, Guangdong, ChinaZhongshan Ophthalmic Center, Sun Yat-sen University
Jul 27, 2023
Eye Diseases, Presbyopia, Refractive Errors Trial in Newport Beach (Aceclidine + Brimonidine, Aceclidine)
Recruiting
- Eye Diseases
- +5 more
- Aceclidine + Brimonidine
- Aceclidine
-
Newport Beach, CaliforniaSite #101
Jul 7, 2023
Air Optix Plus HydraGlyde Multifocal Daily/Extended Wear Contact
Not yet recruiting
- Refractive Errors
- Lotrafilcon B multifocal soft contact lenses
- Comfilcon A multifocal soft contact lenses
- (no location specified)
May 24, 2023
Air Optix Extended Wear Contact Lenses
Not yet recruiting
- Refractive Errors
- Lotrafilcon B spherical soft contact lenses
- +4 more
- (no location specified)
May 24, 2023
Refractive Surgery on OCT Measurements in the Eye
Not yet recruiting
- Optical Coherence Tomography
- +2 more
- Optical coherence tomography
-
Omaha, NebraskaUniversity of Nebraska Medical Centre
May 9, 2023
Visual Acuity in Pre-school Students
Not yet recruiting
- Visual Acuity
- +3 more
- Diagnostic Test: Distance Visual Acuity Examination
-
Alexandroupolis, Evros, GreeceDemocritus University of Thrace
Apr 18, 2023
Air Optix Daily Wear Contact Lenses
Not yet recruiting
- Refractive Errors
- Lotrafilcon B spherical soft contact lenses
- +4 more
-
Fort Worth, TexasContact Alcon Call Center for Trial Locations
Apr 13, 2023
Astigmatism, Refractive Errors Trial in United States (Delefilcon A toric soft contact lens, Lehfilcon A toric soft contact
Not yet recruiting
- Astigmatism
- Refractive Errors
- Delefilcon A toric soft contact lens
- +3 more
-
Los Angeles, California
- +6 more
Mar 23, 2023
Prevalence of Refractive Errors in Primary School Children
Not yet recruiting
- Refractive Errors
- cycloplegic refraction
- (no location specified)
Mar 12, 2023
Refractive Errors Trial in United States (Serafilcon A contact lenses, Senofilcon A contact lenses, CLEAR CARE)
Not yet recruiting
- Refractive Errors
- Serafilcon A contact lenses
- +2 more
-
Los Angeles, California
- +14 more
Mar 1, 2023
Myopia, Refractive Errors, Eye Diseases Trial in Guangzhou (Novel LEDs)
Not yet recruiting
- Myopia
- +2 more
- Novel LEDs
-
Guangzhou, Guangdong, ChinaZhongshan Ophthalmic Center, Sun Yat-sen University
Feb 17, 2023
Refractive Errors Trial in Hong Kong (3000K Reading lamp, 4500K Reading lamp, 6500K Reading lamp)
Recruiting
- Refractive Errors
- 3000K Reading lamp
- +2 more
-
Hong Kong, Kowloon, Hong KongOptometry Research Clinic
Feb 14, 2023
Myopia, Refractive Errors Trial in Anqing (Six interventions for children and adolescents)
Recruiting
- Myopia
- Refractive Errors
- Six interventions for children and adolescents
-
Anqing, Anhui, ChinaAnqing myopia scene
Feb 8, 2023
Free-toroidal Design Lenses on Subjective Visual Quality in
Completed
- Myopia
- Refractive Errors
- The free-toroidal design lenses
-
Tianjin, ChinaTianjin Eye Hospital
Jan 11, 2023
Myopia, Amblyopia, Hyperopia Trial (Fitz Frames 3-D Printed Glasses)
Not yet recruiting
- Myopia
- +3 more
- Fitz Frames 3-D Printed Glasses
- (no location specified)
Jan 9, 2023