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refractive error

Showing 26 - 50 of 1,593
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Cataract, Refractive Error Trial in New Zealand, Philippines, Spain (TECNIS Symfony plus IOL Model ZHR00V, Trifocal Intraocular

Completed
  • Cataract
  • Refractive Error
  • TECNIS Symfony plus IOL Model ZHR00V
  • Trifocal Intraocular lens
  • Remuera, Auckland, New Zealand
  • +4 more
Aug 4, 2021

Age and Refraction in Predicting Myopia Progression in COVID-19

Completed
  • Refraction Error
  • Myopia
  • screening
  • Tianjin, China
    Tianjin Eye Hospital
Mar 29, 2022

Hyperopia, Refractive Error Trial in San Bruno (Simultaneous Vision Bifocal Soft Contact Lenses, Single Vision Soft Contact

Active, not recruiting
  • Hyperopia
  • Refractive Error
  • Simultaneous Vision Bifocal Soft Contact Lenses
  • Single Vision Soft Contact Lenses
  • San Bruno, California
    711 Kains Ave
Jan 11, 2021

Refractive Error in Both Partially Refractive Esotropia and

Completed
  • Refractive Errors
  • +2 more
    • Sakarya, Turkey
      Sakarya University Ophthalmology Department
    Jun 11, 2020

    Effect of Exogenous Growth Hormone on Ocular Findings

    Recruiting
    • Precocious Puberty
    • +2 more
      • Isfahan, Iran, Islamic Republic of
      • +1 more
      Apr 15, 2022

      Anterior Corneal Optical Aberration Induced by CK and Hyperopic

      Unknown status
      • Refractive Error
      • CK surgery
      • Shanghai, Shanghai, China
        Shanghai Guanghua Integrated Traditional Chinese and Western Med
      Dec 15, 2020

      Refractive Error After Primary IOL Implantation Among Congenital

      Completed
      • Cataract
      • primary IOL implantation
      • Guangzhou, Guangdong, China
        Zhognshan Ophthalmic Center, Sun Yat-sen University
      Jun 19, 2020

      Comparative Study in Measuring Anterior Chamber Depth

      Not yet recruiting
      • Error, Refractive
      • Iol master
      • Pentacam
      • (no location specified)
      Mar 23, 2021

      Refractive Error Trial in Pismo Beach, San Diego (enfilcon A, senofilcon A)

      Completed
      Has Results
      • Refractive Error
      • enfilcon A
      • senofilcon A
      • Pismo Beach, California
      • +1 more
      Oct 5, 2020

      Refractive Errors Trial in Madurai (QuickSee refractive error assessment + glasses)

      Completed
      • Refractive Errors
      • QuickSee refractive error assessment + glasses
      • Madurai, Tamil Nadu, India
        Aravind Eye Hospital
      Jul 20, 2020

      Academic Performance and Refractive Error

      Unknown status
      • Refractive Errors
        • Guangzhou, Guangdong, China
          Zhognshan Ophthalmic Center, Sun Yat-sen University
        Apr 7, 2020

        Refractive Error Trial in Chitrakoot, Madurai, Pune (School Model, Referral Model, Referral Model + Cost Recovery)

        Completed
        • Refractive Error
        • School Model
        • +2 more
        • Chitrakoot, India
        • +2 more
        Jul 20, 2020

        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 Error, Myopia Trial in United States (Verofilcon A contact lenses, Etafilcon A contact lenses)

        Completed
        Has Results
        • Refractive Error
        • Myopia
        • Verofilcon A contact lenses
        • Etafilcon A contact lenses
        • Jacksonville, Florida
        • +4 more
        Jun 22, 2020

        Refractive Error, Myopia Trial in United States (Verofilcon A contact lenses, Somofilcon A contact lenses)

        Completed
        Has Results
        • Refractive Error
        • Myopia
        • Verofilcon A contact lenses
        • Somofilcon A contact lenses
        • Jacksonville, Florida
        • +7 more
        Jun 25, 2020

        Refractive Error Trial in London (Hioxifilcon A Test, Hioxifilcon A With Cosmetic Ring Control)

        Completed
        Has Results
        • Refractive Error
        • Hioxifilcon A Test
        • Hioxifilcon A With Cosmetic Ring Control
        • London, United Kingdom
          Optometry Technology Group, Ltd.
        Dec 18, 2019

        Myopia Trial in Guangzhou (Partition defocus myopia management spectacle lens, Spectacle lenses with aspherical lenslets)

        Not yet recruiting
        • Myopia
        • Partition defocus myopia management spectacle lens
        • Spectacle lenses with aspherical lenslets
        • Guangzhou, Guangdong, China
          Zhongshan Ophthalmic Center, Sun Yat-sen University
        Feb 13, 2023

        Refractive Error, Myopia Trial in United Kingdom (nelfilcon A, narafilcon A)

        Terminated
        Has Results
        • Refractive Error
        • Myopia
        • nelfilcon A
        • narafilcon A
        • Bedford, Bedfordshire, United Kingdom
        • +19 more
        Dec 9, 2020

        First-Sight Refractive Error Correction: Direct Comparison to

        Terminated
        • Refractive Error
          • Omaha, Nebraska
          • +1 more
          Jul 29, 2019

          Myopia Trial (CP1, 0.01% atropine)

          Not yet recruiting
          • Myopia
          • CP1
          • 0.01% atropine
          • (no location specified)
          Sep 11, 2023

          Myopia Trial in Houston (Single vision contact lens, Multifocal contact lens)

          Completed
          • Myopia
          • Single vision contact lens
          • Multifocal contact lens
          • Houston, Texas
            University of Houston
          Aug 6, 2022

          Refractive Error, Visual Impairment, Convergence Insufficiency Trial (Eyeglass wearing, Orthoptic exercises, Specialist

          Completed
          • Refractive Error
          • +3 more
          • Eyeglass wearing
          • +2 more
          • (no location specified)
          Nov 7, 2019

          Myopia, Progressive Trial in Shanghai (Airdoc Red Lighting Device, Special Spectacles to Control Myopia)

          Recruiting
          • Myopia, Progressive
          • Airdoc Red Lighting Device
          • Special Spectacles to Control Myopia
          • Shanghai, China
            Shanghai Children Medical Center
          May 21, 2023

          Myopia Trial in Damietta (Implantable Collamer Lens (ICL), Implantable Intraocular Lens (IPCL))

          Completed
          • Myopia
          • Implantable Collamer Lens (ICL)
          • Implantable Intraocular Lens (IPCL)
          • Damietta, Egypt
            Akram Fekry Elgazzar
          Sep 22, 2023

          Prevalence of Refractive Errors in Primary School Children

          Not yet recruiting
          • Refractive Errors
          • cycloplegic refraction
          • (no location specified)
          Mar 12, 2023