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refractive

Showing 1 - 25 of 1,517
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Prevalence of Refractive Errors in Primary School Children

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

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

Factors Influencing Nocturnal Symptoms After Refractive Surgery.

Active, not recruiting
  • Refractive Surgery
  • Visual Quality
  • refractive surgery
  • Nanchang, Jiangxi, China
    The Second Affiliated Hospital of Nanchang University
Dec 13, 2022

ORA and Residual Refractive Astigmatism After SMILE

Completed
  • Refractive Errors
  • Astigmatism
  • Small Incision Lenticule Extraction
  • Taipei, Taiwan
    Taipei Nobel Eye Clinic
Oct 31, 2022

Clinical Investigation of Refraction Techniques

Recruiting
  • Refractive Error
  • Refractive Technique (MR #1)
  • Refractive Technique (MR #2)
  • Birtinya, Queensland, Australia
    Sunshine Eye Clinic
Aug 8, 2022

Psychological Stress, Anesthesia, Anxiety Trial (Xenon, premedication hydroxyzine 25 mg)

Not yet recruiting
  • Psychological Stress
  • +3 more
  • Xenon
  • premedication hydroxyzine 25 mg
  • (no location specified)
Oct 5, 2023

Retinal Detachment, Refractive Errors Trial in Banha (Vitrectomy)

Recruiting
  • Retinal Detachment
  • Refractive Errors
  • Vitrectomy
  • Banhā, QA, Egypt
    Benha University
Oct 13, 2022

Angle Kappa , Corneal High Order Aberrations and Total Eye

Not yet recruiting
  • Aberration, Corneal Wavefront
  • Pentacam Imaging
  • (no location specified)
Feb 14, 2023

Posterior Capsule Opacification Trial in Holon (CleaRing)

Recruiting
  • Posterior Capsule Opacification
  • CleaRing
  • Holon, Tel Aviv, Israel
    Wolfson Medical Center
Oct 11, 2023

Dry Eye Trial in Beijing (artificial tear eyedrops, 0.05% cyclosporine eyedrops)

Recruiting
  • Dry Eye
  • artificial tear eyedrops
  • 0.05% cyclosporine eyedrops
  • Beijing, Beijing, China
    Hong Qi
Sep 12, 2023

After Implantation of an IOL After Cataract Surgery

Active, not recruiting
  • Ophthalmological Disorder
    • Linz, Upper Austria, Austria
      Kepler University Hospital
    Oct 3, 2023

    Individuals With Eye Refraction Defects Trial (Eye exercises)

    Not yet recruiting
    • Individuals With Eye Refraction Defects
    • Eye exercises
    • (no location specified)
    Aug 13, 2023

    Refractive Errors, Myopia, Myopic Astigmatism Trial in Cairo (Refractive Surgery)

    Recruiting
    • Refractive Errors
    • +2 more
    • Refractive Surgery
    • Cairo, Egypt
      Alwatany Eye Hospital
    Jan 1, 2023

    Individualized Refractive Surgery Trial in Alicante (Software development for individualized refractive surgery)

    Recruiting
    • Individualized Refractive Surgery
    • Software development for individualized refractive surgery
    • Alicante, Spain
      Alicante Vissum Miranza
    Sep 20, 2022

    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

    Pseudophakia Trial in Houston (Visual Acuity, Defocus Curve, Intraocular Lens Satisfaction (IOLSAT) Questionnaire)

    Recruiting
    • Pseudophakia
    • Visual Acuity
    • +5 more
    • Houston, Texas
      Berkeley Eye Center
    Sep 26, 2023

    Dry Eye, Dry Eye After LASIK-Laser in Situ Keratomileusis Trial (IPL+LLLT)

    Not yet recruiting
    • Dry Eye
    • Dry Eye After LASIK-Laser in Situ Keratomileusis
    • IPL+LLLT
    • (no location specified)
    Apr 5, 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 Freetown (Eyeglasses, Prescription slip)

    Not yet recruiting
    • Refractive Errors
    • Eyeglasses
    • Prescription slip
    • Freetown, Sierra Leone
      Innovations for Poverty Action (IPA)
    Sep 29, 2023

    Argos in Conjunction With Alcon Vision Suite Following

    Recruiting
    • Cataract
    • Clareon PanOptix and AcrySof Vivity IOL implantation Alcon Vision Suite and Argos biometer
    • Abbotsford, British Columbia, Canada
      Valley Laser Eye Centre
    Jun 2, 2023

    Anxiety-related Fixation Instability During LASIK

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

    Cycloplegia Trial in Damieta (Cycloplegics)

    Completed
    • Cycloplegia
    • Damieta, New Damietta, Egypt
      Ehab tharwat
    Oct 14, 2022

    Refractive Ametropia (Myopia, Hyperopia and Astigmatism) Trial (REVIVE Contact Lens)

    Not yet recruiting
    • Refractive Ametropia (Myopia, Hyperopia and Astigmatism)
    • REVIVE Contact Lens
    • (no location specified)
    Sep 19, 2023

    Safety Outcomes Following Implantation ofAddOn Intraocular Lens

    Not yet recruiting
    • Presbyopia
    • +2 more
    • supplementary intraocular lenses
    • Antwerpen, Belgium
    • +3 more
    Oct 24, 2022