Clinical trials: Surgical Errors
Retinal Detachment, Refractive Errors
Visual Outcome of Vitrectomy After Refractive Surgery
Results of retinal detachment surgery may be affected in cases with history of previous intraocular surgery.
- Trial name
- NCT05583253
- Testing
- Vitrectomy
- Where
- Egypt
- Volunteers
- 50 people
- Sponsor
- Benha University
Cataract, Refractive Errors
Panoptix Trifocal Lens in Post Refractive Myopic Laser Vision Correction Surgery
The two main objectives of this study are to demonstrate safety and effectiveness of implanting the PanOptix Trifocal IOL in patients who have had previous myopic Lasik.
- Trial name
- NCT04698278
- Testing
- PanOptix Trifocal Intraocular Lens
- Where
- United States
- Volunteers
- 20 people, healthy volunteers welcome
- Sponsor
- Parkhurst NuVision Clinical Research LLC
Refractive Errors, Aberration, Corneal Wavefront
Chromatic and Monochromatic Optical Aberrations After Corneal Refractive Surgery
Refractive surgeries can be divided into two distinct categories: 1) corneal surgeries (superficial and deep procedures) carried on the surface of the eye and 2) lens surgeries (phakic IOL, refractive lens exchange) - an…
- Trial name
- NCT03893838
- Where
- Poland
- Volunteers
- 100 people, healthy volunteers welcome
- Sponsor
- Wrocław University of Science and Technology
Refractive Surgery, Myopia
Comparison Between TPRK Versus AAPRK in Correction of Myopia
PURPOSE: The aim of the study is to compare visual acuity means, refractive results, safety, and efficacy of TPRK with AAPRK as primary outcomes and surgical time, pain scores, haze levels, and healing time as secondary outcomes.
- Trial name
- NCT03569423
- Testing
- Transepithelial photorefractive keratectomy, Alcohol assisted photorefractive keratectomy
- Where
- 2 sites in Egypt, Saudi Arabia
- Volunteers
- 100 people
- Sponsor
- Minia University
Cataract, Corneal Astigmatism
Comparison of Toric IOL Implantation and Opposite Clear Corneal Incision During Cataract Surgery to Correct Corneal Astigmatism
With increasing demands of patients concerning refractive outcome after cataract surgery, toric intraocular lenses (IOLs) that correct corneal astigmatism have been introduced more widely to cataract surgery.
- Trial name
- NCT01763151
- Testing
- toric IOL, IOL combined with opposite clear corneal incision (OCCI)
- Where
- Austria
- Volunteers
- 55 people
- Sponsor
- Vienna Institute for Research in Ocular Surgery
Surgical Procedures, Operative
Impact of a Pharmacist-anesthesiologist Collaboration During Anesthesia Consultation on Prevention of Perioperative Medication Errors of Patients in Programmed Surgery
The investigators will evaluate the efficiency of a pharmacist-anesthesiologist collaboration in the anesthetic consultation in the prevention of medical errors perioperatively in patients undergoing scheduled surgery
- Trial name
- PREVEMCA (NCT04013061)
- Testing
- Pluridisciplinary consultation
- Where
- 3 sites in France
- Volunteers
- 378 people
- Sponsor
- Centre Hospitalier Universitaire de Nīmes
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)
Myopia
Lacritin and Heparanase Levels in Human Tears After Laser Refractive Surgery
The purpose of this study is to measure tear lacritin and heparanase levels before and following surgery using a minimal risk procedure to collect tears from patients undergoing PRK or LASIK.
- Trial name
- NCT01049724
- Testing
- Tear collection
- Where
- United States
- Volunteers
- 196 people, healthy volunteers welcome
- Sponsor
- Fort Belvoir Community Hospital
Cataract
Impact of a Corneal Pre-cut on Wound Architecture and Astigmatism in Cataract Surgery - a Pilot Study
We would like to evaluate the use of a 600μm pre-cut regarding wound architecture and surgically induced astigmatism as compared to a stab-incision (a corneal incision without a pre-cut).
- Trial name
- NCT02155270
- Testing
- Corneal precut 600µm, Corneal stabincision
- Where
- Austria
- Volunteers
- 55 people
- Sponsor
- Prim. Prof. Dr. Oliver Findl, MBA
Refractive Error
WaveLight® Refractive Flap Accuracy Study
The purpose of this study is to evaluate the accuracy of the WaveLight FS200 femtosecond laser, as assessed by 1 day and 1 month post-operative optical coherence tomography (OCT) anterior segment corneal measurements compared to…
- Trial name
- NCT01941485
- Testing
- WaveLight® Refractive Suite, LASIK surgery
- Volunteers
- 60 people
- Sponsor
- Alcon Research
Myopia, Astigmatism
A Three-Phase Contralateral Comparison of Ray-Tracing Guided LASIK Versus Three Other Refractive Surgery Platforms to Correct Myopia or Myopia With Astigmatism
This purpose of this study is to compare a new form of LASIK called Ray Tracing Guided LASIK to 3 other forms of corneal refractive surgery: 1. KLEx (KeratoLenticule Extraction) using the Zeiss Visumax 800 Laser, 2.
- Trial name
- NCT07201298
- Testing
- Ray-Tracing Guided LASIK, Keratorefractive Lenticule Extraction (KLEx), WaveFront Optimized LASIK
- Where
- United States
- Volunteers
- 120 people, healthy volunteers welcome
- Sponsor
- Hoopes Vision
Refractive Error
WaveLight® Refractive Myopic Study
The purpose of this study is to evaluate outcomes of subjects undergoing myopic surgery using the WaveLight® Refractive Suite (Excimer EX500 and Femtosecond FS200 lasers).
- Trial name
- NCT01941498
- Testing
- Wavelight® Refractive Suite, LASIK surgery
- Volunteers
- 104 people
- Sponsor
- Alcon Research
Presbyopia Correction, Astigmatism
A Planned Study at Multiple Sites is Being Done to Compare the Results of Two Types of Trifocal Toric Intraocular Lenses Used in Cataract Surgery
To evaluate the clinical outcomes and patient satisfaction of two commercially available trifocal toric intraocular lenses Primary Objective: To compare the distance-corrected intermediate visual acuity between the two trifocal…
- Conditions
- Presbyopia Correction, Astigmatism, Cataract
- Trial name
- NCT07232615
- Testing
- Optiflex TRIO Intraocular Lens, AcrySof® IQ PanOptix®
- Where
- 6 sites in Germany, India and 1 more
- Volunteers
- 138 people
- Sponsor
- Biotech Healthcare Holding Gmbh
Gall Bladder Disease
Investigating Three-Dimensional Versus Two-Dimensional Imaging in Laparoscopic Cholecystectomies
During laparoscopic surgery, your surgeon operates through 'keyhole' incisions in your abdomen. These allow long tools and a camera to pass to perform the surgery and allow the surgeon to see inside you.
- Trial name
- NCT01930344
- Testing
- 3D Laparoscopic visual system, 2D Laparoscopic visual system
- Where
- United Kingdom
- Volunteers
- 114 people, healthy volunteers welcome
- Sponsor
- Royal Surrey County Hospital NHS Foundation Trust
Refractive Errors
Correction of Refractive Error Surprises After Cataract Surgery in Adults
A refractive surprise can be defined as the failure to achieve the intended postoperative refractive target or the presentation of unexpected and, unwanted post-operative refractive error.
- Trial name
- NCT06379477
- Testing
- Refractive surgeries
- Volunteers
- 63 people
- Sponsor
- Assiut University
Pterygium, Cataract
Effect of Pterygium Excision on Intraocular Lens Power Calculation for Subsequent Cataract Operation
Pterygium is known to induce with-the-rule astigmatism. Excision of pterygium will steepen the cornea and reduce corneal astigmatism.
- Conditions
- Pterygium, Cataract, Astigmatism
- Trial name
- NCT00563667
- Testing
- pterygium excision
- Where
- 3 sites in China
- Volunteers
- 40 people
- Sponsor
- Hospital Authority, Hong Kong
Cataract, Lens Opacities
Implantation of a Trifocal Hydrophobic IOL in Patients That Underwent Refractive Surgery
Controlled, open label, prospective Post Market Clinical Follow-Up, single-center clinical study to investigate visual performance after implantation of a trifocal IOL (PhysIOL Pod L GF) in patients that underwent refractive…
- Conditions
- Cataract, Lens Opacities, Presbyopia
- Trial name
- NCT04054427
- Testing
- IOL implantation experimental
- Volunteers
- healthy volunteers welcome
- Sponsor
- Beaver-Visitec International, Inc.
Non-Invasive Blood Pressure Monitoring in Trendelenburg Position
How Accurate Is Non-Invasive Blood Pressure Monitoring During Trendelenburg Laparoscopic Surgery?
This study will test how accurate a blood pressure cuff is during certain types of surgery. During some abdominal surgeries done with small tools and a camera (called laparoscopic surgery), doctors place patients in a head-down…
- Trial name
- NCT07107425
- Where
- Turkey (Türkiye)
- Volunteers
- 100 people
- Sponsor
- Koç University
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
Retinal Detachment, Lens Diseases
Retinal Detachment After Lens Surgery in the Nearsighted
This study aims to study the incidence of retinal detachment in the nearsighted myopic after phakoemulsification lens surgery and use of posterior chamber foldable soft implants with a follow-up of 5 years and preliminary results…
- Conditions
- Retinal Detachment, Lens Diseases, Short-Sighted
- Trial name
- A09F0401 (NCT04072939)
- Testing
- Patients having had a lens surgery
- Volunteers
- 101 people
- Sponsor
- University Hospital, Bordeaux