Clinical trials: Cornea
Keratoconus
Validation of Innovative Scheimpflug Topography Derived RGP Contact Lens Designs In Optometry Network
The goal of this Prospective, single-site, cohort study is to validate rigid gas permeable corneal contact lens (RGP) designs for keratoconus derived from combining the data from corneal topography scans and contact lenses…
- Trial name
- VISION (NCT06312163)
- Testing
- The contact lens to be investigated in this study (Scheimpflug topography derived corneal RGP contact lens design). A CE (UKCA) marked class 2 medical devices.
- Where
- United Kingdom
- Volunteers
- 120 people, healthy volunteers welcome
- Sponsor
- Moorfields Eye Hospital NHS Foundation Trust
Wavefront Aberration, Corneal, Refractive Errors
Digital Wavefront Sensing
A holographic optical coherence tomography (H-OCT) setup is used to detect the wavefront by means of phase reconstruction.
- Trial name
- DWS (NCT04597255)
- Testing
- Holographic optical coherence tomography
- Volunteers
- 30 people, healthy volunteers welcome
- Sponsor
- Medical University of Vienna
Cataract, Healthy Eye
The Heidelberg Engineering ANTERION Anterior Segment Cornea and IOL Precision and Agreement Study
This is a prospective clinical study that will be conducted at one clinical site located in the United States to assess anterior segment parameters with the ANTERION
- Conditions
- Cataract, Healthy Eye, Cornea Abnormality, Post-Keratorefractive Surgery
- Trial name
- NCT04130490
- Testing
- ANTERION
- Where
- United States
- Volunteers
- 176 people, healthy volunteers welcome
- Sponsor
- Heidelberg Engineering GmbH
Corneal Dystrophy
Corneal Endothelium Morphology and Central Thickness in Type II Diabetes Mellitus and Normal Subjects
The purpose of this study is to compare corneal endothelium morphology and central thickness in type II Diabetes Mellitus and normal subjects with special reference to glycemic status.
- Trial name
- NCT01084850
- Where
- Denmark
- Volunteers
- 300 people, healthy volunteers welcome
- Sponsor
- Frederiksberg University Hospital
Keratoconus
Treatment of Keratoconus With Advanced Corneal Crosslinking
The purpose of this study was to determine whether mechanical compression of the cornea during corneal crosslinking for keratoconus using a sutured rigid contact lens can improve the optical outcomes of the treatment.
- Trial name
- NCT02425150
- Testing
- Corneal reshaping/crosslinking (CRXL), Corneal Crosslinking (CXL)
- Volunteers
- 120 people, healthy volunteers welcome
- Sponsor
- Umeå University
Dry Eye Syndromes
The Effects of BAK on the Blood Aqueous Barrier of Pseudophakic Patients
BAK is one of the most frequent preservatives in eye drops. BAK is a quaternary ammonium salt with surfactant qualities. It can be bacteriostatic or bactericidal depending on the concentrations used.
- Trial name
- NCT01280110
- Testing
- Hydroxypropylmethylcellulose, Carboxymethylcellulose
- Where
- Brazil
- Volunteers
- 44 people, healthy volunteers welcome
- Sponsor
- University of Campinas, Brazil
Macular Dystrophy, Corneal
Phase 1 Pilot Study of 4-MP to Treat Stargardt Macular Dystrophy
The purpose of this study is to investigate whether taking 4-methylpyrazole (4-MP, fomepizole, Antizol™) inhibits dark adaptation of the eye.
- Trial name
- NCT00346853
- Testing
- 4-Methylpyrazole, saline
- Where
- United States
- Volunteers
- 10 people, healthy volunteers welcome
- Sponsor
- University of Utah
Corneal Ulcer
Studying the Relationship Between Contact Lens Packaging Solutions and Bacterial Binding to Surface Eye Cells
The goal of this study is to investigate the overall theory that the use of chemically preserved solutions associated with contact lenses promotes an increase in bacterial infection.
- Trial name
- NCT01104961
- Testing
- Contact lens packaging solution, Balanced salt solution (BSS)
- Where
- United States
- Volunteers
- healthy volunteers welcome
- Sponsor
- University of Texas Southwestern Medical Center
Keratoconus
The Collagen Factors of Rapid Progression of Keratoconus in Children.
The purpose of this observational study was to understand the differences in clinical features and mechanisms of keratoconus between children and adults.
- Trial name
- KCLD (NCT06722937)
- Testing
- Observation
- Where
- China
- Volunteers
- 160 people, healthy volunteers welcome
- Sponsor
- Zhongshan Ophthalmic Center, Sun Yat-sen University
Cornea; Sense Loss
Investigation in Corneal Sensation
The aim is to find out more about how corneal sensory fibres react to different types of stimuli (liquid / tactile / nylon thread) and how this can be consciously perceived by the individual.
- Trial name
- NCT04045509
- Testing
- Liquid Jet Esthesiometer Prototype, Tactile Esthesiometer Prototype, Cochet Bonnet esthesiometer
- Where
- Switzerland
- Volunteers
- 90 people, healthy volunteers welcome
- Sponsor
- Daniela Nosch
Healthy, Dry Eyes
Topical Menthol For Tear Secretion
Tears are the natural way to keep eyes moist, and tears are important for good vision and healthy eyes. Eyes without enought tears get dry and sore.
- Trial name
- TMTS (NCT07109609)
- Testing
- Topical application of 20% menthol solution in MCT oil.
- Where
- Canada
- Volunteers
- 30 people, healthy volunteers welcome
- Sponsor
- Reinhold Vieth
Keratoconjunctivitis Sicca
TearLab Core Validation Study to Establish Referent Values for Dry Eye Disease
This is a prospective, observational case series to determine the clinical utility of tear osmolarity and other commonly used objective tests to diagnose dry eye disease, as well as to establish referent values for objective…
- Trial name
- CVS (NCT00848198)
- Where
- 10 sites in United States, France and 3 more
- Volunteers
- 314 people, healthy volunteers welcome
- Sponsor
- TearLab Corporation
Keratoconus, Corneal Cross-Linking
Surface Ablation With Corneal Cross Linking in Mild Keratoconus
Interventional and comparative prospective study: Sixty-nine eyes (38 patients) suffering from keratoconus (stages 1-2 Amsler-Krumeich classification) will be divided into four groups.
- Trial name
- NCT05176171
- Testing
- Photorefractive Keratectomy with Corneal Cross-Linking
- Where
- Iran
- Volunteers
- 50 people, healthy volunteers welcome
- Sponsor
- Shahid Beheshti University
Keratoconus
Reliability of Topography Measurements in Keratoconus
The purpose of this study is to assess the reliability and repeatability of the parameters obtained using the Galilei dual-scheimpflug corneal topographer for monitoring progression in eyes with keratoconus.
- Trial name
- NCT03511495
- Testing
- Galilei Corneal Topographer
- Where
- United States
- Volunteers
- 86 people, healthy volunteers welcome
- Sponsor
- Milton S. Hershey Medical Center
Juvenile Systemic Lupus Erythematosus
AS-OCT Study of Cornea and Tear Film Parameters in Juvenile SLE Patients
The aim of thie study to assess tear film parameters such as tear meniscus height (TMH), tear meniscus area (TMA), and tear meniscus depth (TMD).
- Trial name
- NCT05015465
- Testing
- Anterior Segment OCT
- Where
- Egypt
- Volunteers
- 140 people, healthy volunteers welcome
- Sponsor
- Minia University
Eye Diseases
Pix2pix Networks for Scheimpflug Corneal Tomography Image Generation
Computer-aided medical image analysis has advantages, but requires large amounts of training data, which are scarce and costly to obtain, are subject to privacy concerns, and are often highly imbalanced, with over-representation…
- Trial name
- NCT04582253
- Testing
- Scheimpflug Camera Corneal Tomography
- Where
- Egypt
- Volunteers
- 923 people, healthy volunteers welcome
- Sponsor
- Assiut University
Irregular; Contour of Cornea, Keratoconus
Scleral Versus Corneal RGP Contact Lenses in Irregular Cornea Disorders
The most common causes for irregular cornea (IC) in hospital contact lens practice are Keratoconus (KC) and related cornea thinning disorders.
- Conditions
- Irregular; Contour of Cornea, Keratoconus, Pellucid Marginal Corneal Degeneration, Injury of Cornea
- Trial name
- NCT02444923
- Testing
- Scleral rigid gas permeable contact lenses (SRGPcl) (Zenlens™), Corneal Rigid gas Permeable contact lenses (CRGPcl) (Rose K2)
- Where
- United Kingdom
- Volunteers
- 30 people, healthy volunteers welcome
- Sponsor
- London South Bank University
Cornea
Influence of Silicone Hydrogel Extended Contact Lens Wear on Corneal Sensitivity
Soft contact lens wear reduces the amount of oxygen reaching the eye, which may have an influence on corneal sensitivity. The aim of this study is to measure corneal sensitivity with means of liquid jet esthesiometry at baseline…
- Trial name
- NCT05298917
- Testing
- silicone hydrogel contact lens
- Where
- Switzerland
- Volunteers
- 30 people, healthy volunteers welcome
- Sponsor
- Daniela Nosch
Keratoconus
Topography Versus Non-Topography-Guided PRK With CXL in Keratoconus
To our knowledge, this study is one of the first to compare the visual results of non-topography-guided and topography-guided photorefractive keratectomy (PRK) applying sequential and simultaneous corneal cross-linking (CXL)…
- Trial name
- keratoconus (NCT03890718)
- Testing
- Photorefractive keratectomy in mile keratoconus
- Where
- Iran
- Volunteers
- 38 people, healthy volunteers welcome
- Sponsor
- Shahid Beheshti University
Cornea; Ectasia, Refractive Errors
Corneal Elastography and Patient Specific Modeling
The goal of this research is to develop measurement tools and simulation technology for characterizing and predicting individual responses to corneal treatments and for advancing understanding of corneal ectasia risk factors.
- Conditions
- Cornea; Ectasia, Refractive Errors, Keratoconus
- Trial name
- NCT03030755
- Testing
- Optical coherence tomography
- Where
- United States
- Volunteers
- 60 people, healthy volunteers welcome
- Sponsor
- The Cleveland Clinic