Clinical trials: Refractive Surgery
Corneal Astigmatism
Limbal Relaxing Incisions Versus Paired 4 mm Clear Corneal Incisions on Steep Meridian During Phacoemulsification
The goal of this is prospective, computer based randomized clinical trial is to compare the efficacy of reduction of the pre-existing corneal astigmatism at the time of cataract surgery in patients admitted in sohag university…
- Trial name
- LRI-CCI (NCT05593263)
- Testing
- surgical correction of astigmatism with cataract
- Volunteers
- 120 people
- Sponsor
- Sohag University
Myopia, Astigmatism
Wavefront-guided LASIK Surgery Compared to Ray Tracing-Guided LASIK Surgery
We are enrolling participants aged 22 and older to have LASIK surgery in both eyes. We will perform wavefront-guided LASIK in one eye and ray tracing-guided LASIK in the fellow eye of each participant.
- Trial name
- NCT07078799
- Testing
- LASIK
- Where
- United States
- Volunteers
- 70 people, healthy volunteers welcome
- Sponsor
- Stanford University
Glaucoma, Ocular Hypertension
Comparing Refractive and Visual Outcomes of MIGS and Traditional Surgeries
The primary goal of this study is to evaluate refractive and visual outcomes in glaucoma patients who will be having either traditional glaucoma surgery or minimally invasive glaucoma surgery, also known as MIGS.
- Trial name
- NCT03584958
- Where
- United States
- Volunteers
- 150 people
- Sponsor
- Wills Eye
Refractive Errors
Measurement of Refractive SE Following Implantation of LS313 MF30 IOL
This Study determines the most precise method for measuring post-operative refraction following implantation of the asymmetric multifocal LS-313 MF30 comparing the results of Refraction of the different Autorefractor Keratometers…
- Trial name
- NCT03292614
- Testing
- Measurements of the postoperative refraction
- Where
- Germany
- Volunteers
- 25 people
- Sponsor
- Dietrich-Bonhoeffer-Klinikum
Aphakia, Presbyopia
Contralateral Claims Study of Clareon Vivity Pro
The purpose of this study is to test new versions of Clareon Vivity Pro intraocular lenses (IOLs) by comparing them to currently marketed IOLs.
- Trial name
- NCT07484191
- Testing
- Clareon Vivity Pro IOL, Clareon Vivity IOL, TECNIS PureSee IOL
- Where
- 7 sites in Australia
- Volunteers
- 165 people
- Sponsor
- Alcon Research
Myopia, Keratoconus
Assessment of Corneal Biomechanical Properties Using Corvis ST and ECD Following LASIK, PRK, CXL, Veriflex IOL and Implantable Collamer Lens
To evaluate corneal biomechanical changes using the Corvis ST and ECD in patients who have under-gone LASIK, PRK, corneal cross-linking (CXL), Veriflex IOL and ICL.
- Conditions
- Myopia, Keratoconus, Refractive Surgery
- Trial name
- NCT06818461
- Testing
- Corvis St Before and after lasik, PRK, CXL, Veriflex IOL and ICL
- Where
- Egypt
- Volunteers
- 150 people, healthy volunteers welcome
- Sponsor
- Beni-Suef University
Cataract, Fuchs Endothelial Corneal Dystrophy
Partial Range Of Field IOLs in DMEK-Enabled Procedures
Study Overview This study aims to evaluate the visual outcomes, quality of vision, and patient satisfaction after receiving an extended range PRoF intraocular lens (IOL) during triple Descemet Membrane Endothelial Keratoplasty…
- Trial name
- PROFIDE (NCT07441616)
- Testing
- combined cataract and lamellar endothelial keratoplasty
- Where
- Belgium
- Volunteers
- 10 people
- Sponsor
- Universitair Ziekenhuis Brussel
Cataract, Presbyopia
Non-comparative Study to Assess the Visual Performances and Safety of a Progressive Multifocal Intraocular Lens
This is an interventional, non-controlled, multicenter international trial with a prospective design on one cohort of patients.
- Trial name
- PSM15 (NCT02838004)
- Testing
- IOL MINI WELL READY
- Where
- Germany
- Volunteers
- 77 people
- Sponsor
- SIFI SpA
Primary Pterygium, Astigmatism
Preoperative and Postoperative Refractive and Topographic Evaluation in Patients With Primary Pterygium: Comparison of Two Surgical Techniques
This study evaluated changes in refractive status and corneal topography before and after surgical treatment of primary pterygium.
- Trial name
- RETOP (NCT07742995)
- Testing
- Conjunctival Autograft, Amniotic Membrane Transplantation
- Volunteers
- 78 people
- Sponsor
- Instituto de Oftalmología Fundación Conde de Valenciana
Corneal Astigmatism, Intraocular Pressure
How Astigmatism Influences Corneal Biomechanics and Intraocular Pressure
The aim of the study was to identify whether preoperative corneal astigmatism can influence corneal biomechanics and the assessment of intraocular pressure (IOP) following micro-incision phacoemulsification.
- Conditions
- Corneal Astigmatism, Intraocular Pressure, Cataract Senile
- Trial name
- NCT03162471
- Testing
- non-contact measurement of intraocular pressure
- Volunteers
- 39 people
- Sponsor
- Medical University of Lodz
Astigmatism
Surgical Correction of Astigmatism
Laser correction for myopia and astigmatism using an excimer laser has been performed with success for several years. During the last 2 years, a new method for correction of refractive errors has emerged.
- Trial name
- NCT01680354
- Testing
- ReLEx, LASIK
- Where
- Denmark
- Sponsor
- Aarhus University Hospital
Cataract
Intraocular Lens Power Calculation After Laser Refractive Surgery Based on Optical Coherence Tomography
The long-term goal of this project is to utilize very high-speed optical coherence tomography (OCT) technology to guide surgical treatments of corneal diseases.
- Trial name
- OCT IOL (NCT00532051)
- Testing
- OCT measurements
- Where
- United States
- Volunteers
- 690 people
- Sponsor
- Oregon Health and Science University
Epiretinal Membrane
Refractive Consequences of Epiretinal Membrane Surgery
Epiretinal membrane is treated with vitrectomy and peeling. Afterwards cataract is usually developed, which requires a cataract surgery.
- Trial name
- EPIREF (NCT02413619)
- Testing
- Vitrectomy, Cataract surgery, Combined surgery
- Where
- Denmark
- Volunteers
- 62 people
- Sponsor
- Glostrup University Hospital, Copenhagen
Cataract, Astigmatism
Evaluation of the Accuracy & Safety of the LaserArcs Nomogram
Evaluation of the Accuracy and Safety of the LaserArcs Femtosecond Cataract Surgery Arcuate Incision Nomogram in Patients Undergoing Cataract Surgery and Astigmatism Reduction
- Trial name
- NCT05278442
- Testing
- LaserArc
- Where
- United States
- Volunteers
- 50 people
- Sponsor
- Research Insight LLC
Cataract, Astigmatism
Astigmatism Correction With Intrastromal Arcuate Incisions in Eyes Undergoing Cataract Surgery With Femtosecond Laser Using the Cassini Ambient With Iris Registration (ARCUATAS)
This is an observational, prospective follow-up post-marketing study of CE marked medical devices aimed at treating astigmatism in patients with cataracts.
- Trial name
- ARCUATAS (NCT05053620)
- Testing
- Calculation of the arcuate intrasomal incisions
- Where
- Spain
- Volunteers
- 22 people
- Sponsor
- OFTALVIST (Oftalmología Vistahermosa S.L)
Visual Impairment, Hearing Loss
Survey of Sensory Impairment Indicators Among Adults Aged 65 Years and Older in Xinxing County
This cross-sectional population-based survey will be conducted among residents aged 65 years and older in Xinxing County, Yunfu, Guangdong Province, China.
- Conditions
- Visual Impairment, Hearing Loss, Dual Sensory Impairment, Cataract
- Trial name
- NCT07694505
- Where
- China
- Volunteers
- 2,854 people, healthy volunteers welcome
- Sponsor
- Zhongshan Ophthalmic Center, Sun Yat-sen University
Myopia
Does Pupil Size Matters in Refractive Surgery?
To determine the influence of pupil size in refractive surgery. If any influence exist.
- Trial name
- NCT01678729
- Volunteers
- 60 people, healthy volunteers welcome
- Sponsor
- Ziv Hospital
Corneal Astigmatism
Toric IOL vs Non-toric IOL With LRI for Corneal Astigmatism
The purpose of the study is to compare the astigmatism reducing effect of a toric intraocular lens (IOL) (model MX60T - Bausch \& Lomb) with that of limbal relaxing incisional surgery combined with a non toric IOL (model MX60 …
- Trial name
- NCT03633851
- Testing
- Toric intraocular MX60T lens, Standard MX60 plus corneal incisions
- Where
- United Kingdom
- Volunteers
- 30 people, healthy volunteers welcome
- Sponsor
- Ashford and St. Peter's Hospitals NHS Trust
The Comparison of IOL Formulas in Eyes With PCE≥15um Undergoing Cataract Surgery
Comparison of IOL Formulas in Eyes With PCE≥15µm
The goal of this observational study is to evaluate the long-term refractive outcomes of advanced intraocular lens (IOL) power calculation formulas in cataract patients with posterior corneal elevation (PCE ≥ 15 μm).
- Trial name
- NCT07346456
- Testing
- Intraocular lens calculation formulas
- Where
- China
- Volunteers
- 102 people
- Sponsor
- Second Affiliated Hospital of Xi'an Jiaotong University
Cataract, Presbyopia
Visual Results of the Acrysof IQ Vivity Toric Extended Vision Intraocular Lens
The main goal of this study is to evaluate real-world visual outcomes, rotational stability, and patient reported visual disturbances with a non-diffractive extended vision presbyopia and astigmatism correcting intraocular lens…
- Conditions
- Cataract, Presbyopia, Corneal Astigmatism
- Trial name
- NCT04652037
- Testing
- Acrysof IQ Vivity Toric Extended Vision Intraocular Lens Implantation
- Where
- Canada
- Volunteers
- 20 people
- Sponsor
- Centre hospitalier de l'Université de Montréal (CHUM)