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refractive errors

Showing 1 - 25 of 146
STUDY
CONDITIONS
INTERVENTIONS
LOCATIONS
LAST UPDATED

Anxiety-related Fixation Instability During LASIK

Completed
  • Refractive Errors
  • Laser in situ keratomileusis (LASIK)
  • Assiut, Egypt
    Tiba Eye Center
Nov 27, 2023

Cycloplegia, Refractive Errors, Esotropia Trial in Irbid, Doha (Cyclopentolate, Tropicamide)

Recruiting
  • Cycloplegia
  • +3 more
  • Irbid, Jordan
  • +1 more
Oct 5, 2023

Refractive Errors Trial in Freetown (Eyeglasses, Prescription slip)

Not yet recruiting
  • Refractive Errors
  • Eyeglasses
  • Prescription slip
  • Freetown, Sierra Leone
    Innovations 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, Egypt
    Al 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, Texas
    Contact 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, China
    Zhongshan 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
  • Newport Beach, California
    Site #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, Nebraska
    University 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, Greece
    Democritus 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, Texas
    Contact 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, China
    Zhongshan 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 Kong
    Optometry 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, China
    Anqing myopia scene
Feb 8, 2023

Free-toroidal Design Lenses on Subjective Visual Quality in

Completed
  • Myopia
  • Refractive Errors
  • The free-toroidal design lenses
  • Tianjin, China
    Tianjin 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