Clinical trials: Surgical Errors
Refractive Surgery
Topography Guided LASIK by Different Protocols for Treatment of Astigmatism
Background and Rationale: LASIK has been among the highest satisfaction rates of surgical procedures, ranging from 82%-98%. Different ablation profiles have been developed over the years.
- Trial name
- NCT03597906
- Testing
- topography guided ablation, manifest refraction, full topography modified refraction
- Where
- Egypt
- Volunteers
- 30 people, healthy volunteers welcome
- Sponsor
- Cairo University
Mucopolysaccharidosis (MPS)
Mucopolysaccharidosis (MPS) I, II, and VI Screening in a High-Risk Population With Previous Surgical Repair or Presence of Inguinal and/or Umbilical Hernia in Combination With Pediatric ENT Surgery (The HATT Project)
Mucopolysaccharidosis (MPS) type II (MPS II; Hunter syndrome) is a rare, X-linked disease caused by a deficiency of the lysosomal enzyme iduronate-2-sulfatase (I2S) and occurs almost exclusively in boys, with an incidence of…
- Trial name
- NCT02095015
- Where
- 14 sites in United States, Canada and 5 more
- Volunteers
- 159 people
- Sponsor
- Shire
Myopia, Astigmatism
Evaluation of Visual Outcomes After Myopic LASIK
The aim of the study was to evaluate visual outcomes, contrast sensitivity, glare testing and high order aberrations induced by different laser technologies and to evaluate differences in aberrometer technology.
- Conditions
- Myopia, Astigmatism, Myopic Astigmatism
- Trial name
- NCT00366743
- Testing
- Conventional LASIK, Wavefront-guided LASIK
- Volunteers
- 120 people
- Sponsor
- Medical University of South Carolina
Myopia
Evaluation of Conventional Photorefractive Keratectomy (PRK) in U.S. Army Personnel, Substudy of: Initial Evaluation of Excimer Laser Keratorefractive Surgery in U.S. Army Personnel
The purpose of this study is to: 1. evaluate the safety and efficacy of conventional PRK in U.S. Army personnel who have naturally occurring myopia with or without astigmatism. 2.
- Trial name
- NCT00412568
- Testing
- Photorefractive Keratectomy (PRK)
- Where
- United States
- Volunteers
- 150 people, healthy volunteers welcome
- Sponsor
- Walter Reed Army Medical Center
Cataract
Optimizing Refractive Results and Patient Satisfaction After Cataract Surgery
Cataract surgery is the most common eye surgery in the world. If the patient with cataract uses spectacles and both patient and surgeon find it beneficial, it is possible to compensate for the spectacles during surgery and…
- Trial name
- ORAPSCA (NCT05001932)
- Testing
- Cataract surgery
- Where
- Denmark
- Volunteers
- 400 people
- Sponsor
- Copenhagen University Hospital, Rigshospitalet
Cataract, Corneal Astigmatism
ClarVista HARMONI Toric Trial With Intraoperative Exchange
The purpose of this study was to demonstrate the safety and effectiveness of the HARMONI® Modular Intraocular Lens System with a toric optic in subjects with pre-existing corneal astigmatism in need of cataract surgery.
- Conditions
- Cataract, Corneal Astigmatism, Aphakia
- Trial name
- NCT03054649
- Testing
- HARMONI® Modular Intraocular Lens System, Intraoperative optic exchange
- Where
- 2 sites in Mexico, Philippines
- Volunteers
- 44 people
- Sponsor
- ClarVista Medical
Surrgical Induced Astigmatism
Surgically Induced Astigmatism of Temporal Versus Nasal Clear Corneal Phacoemulsification
To compare the short-term astigmatic outcomes of phacoemulsification cataract surgery and intraocular lens implantation using temporal versus nasal clear corneal incisions.
- Trial name
- NCT00521833
- Testing
- phacoemulsification and intraocular lens implantation
- Where
- Iran
- Volunteers
- 20 people
- Sponsor
- Shahid Beheshti University of Medical Sciences
Corneal Astigmatism, Cataract
Effectiveness, Stability and Influence Factors of Femtosecond Laser Assisted Cataract Surgery
What is this study about? This study looks at whether a laser procedure called femtosecond laser-assisted arcuate keratotomy (FSAK) helps people with both cataracts and mild astigmatism see more clearly after cataract surgery.
- Trial name
- NCT07081919
- Testing
- femtosecond laser-assisted arcuate keratotomy (FSAK) combined with standard cataract surgery
- Where
- China
- Volunteers
- 105 people
- Sponsor
- Eye & ENT Hospital of Fudan University
Astigmatism
Astigmatism Management in Cataract Surgery With the AcrySof Toric Intraocular Lens
The purpose of this study is to determine if Toric intraocular lens implantation in cataract surgery is a more efficient and cost-effective treatment of astigmatism than Monofocal intraocular lens implantation.
- Trial name
- NCT01075542
- Testing
- AcrySof Toric intraocular lens, model SN60TT, AcrySof Monofocal IOL, model SN60AT
- Where
- 3 sites in Netherlands
- Volunteers
- 86 people
- Sponsor
- Maastricht University Medical Center
Macular Hole, Myopia
Efficacy and Safety of Myopic Macular Hole Closure Surgery Without Endotamponade Agent
Macular hole (MH) is a common condition that affects approximately 1.6/1000 elderly Chinese population. The prevalence is expected to be even higher in individuals with high myopia (HM), an established risk factor for MH.
- Trial name
- NCT07129798
- Testing
- ILM flap with no endotamponade technique
- Where
- Hong Kong
- Volunteers
- 20 people
- Sponsor
- Chinese University of Hong Kong
Adrenal Tumor, Adrenal Mass
Prevention of Conversion in Posterior Retroperitoneal Adrenalectomy by Measuring Preoperative Anatomical Conditions
With our retrospective study the investigators show the limitations of the posterior retroperitoneal adrenalectomy by analyzing anatomical parameters.
- Conditions
- Adrenal Tumor, Adrenal Mass, Pheochromocytoma, Conn Adenoma
- Trial name
- NCT04071561
- Testing
- Posterior retroperitoneal adrenalectomy (PRA), Lateral transperitoneal adrenalectomy (LTA)
- Where
- Switzerland
- Volunteers
- 14 people
- Sponsor
- University of Basel
Refractive Errors
Early Feasibility Study to Evaluate the AccuraSee in Correcting Residual Refractive Errors After Cataract Surgery
To determine if the intraocular pseudophakic contact lens (IOPCL), referred to as the AccuraSee, corrects residual refractive errors after cataract surgery using a plus powered lens in subjects with ocular pathology previously…
- Trial name
- NCT05113979
- Testing
- AccuraSee IOPCL with +3.0D add
- Where
- United States
- Volunteers
- 10 people, healthy volunteers welcome
- Sponsor
- OnPoint Vision Inc
ATTR Amyloidosis, Cardiopathy
Orthopaedic Specimen Pathology and Early Diagnosis of ATTR Cardiopathy (ATTR-ORTHO)
The goal of this observational study is to learn about the frequency of ATTR amyloid, cardiac involvement and associated features, in 150 patients aged 50 or more years, and operated for an idiopathic carpal tunnel syndrome…
- Conditions
- ATTR Amyloidosis, Cardiopathy, Carpal Tunnel Syndrome, Lumbar Spine Stenosis
- Trial name
- ATTR-ORTHO (NCT06367842)
- Where
- France
- Volunteers
- 150 people
- Sponsor
- Institut Mutualiste Montsouris
Astigmatism, Cataract
Astigmatism Management With Iris-registration Guided Corneal Relaxing Incisions or Toric IOLs During Cataract Surgery
Most of the patients presenting for cataract surgery also have pre-existing corneal astigmatism which if left uncorrected can adversely affect visual and refractive outcomes after cataract surgery.
- Trial name
- NCT05561296
- Testing
- Femtosecond laser assisted cataract surgery with astigmatism management
- Where
- United States
- Volunteers
- 50 people
- Sponsor
- Kenneth J Rosenthal
Presbyopia
Visual and Economic Profits of ReSTOR® Multifocal Intraocular Lenses (IOL) on Public Health Patients in Spain
Surgical correction of presbyopia is possible via the implantation of multifocal intraocular lenses after removal of the crystalline lens.
- Trial name
- NCT01088282
- Testing
- Cataract surgery
- Where
- 2 sites in Spain
- Volunteers
- 120 people
- Sponsor
- University of Barcelona
Refractive Error, Glaucoma
A Post-market Clinical Study to Collect Safety and Performance Data on Johnson & Johnson Surgical Vision Products
Retrospective collection of data from medical records, multicenter, post-market clinical follow-up study.
- Conditions
- Refractive Error, Glaucoma, Cataracts, Clear Lens Exchange
- Trial name
- NCT05394324
- Testing
- Intervention
- Where
- 13 sites in United States, Germany and 1 more
- Volunteers
- 1,674 people
- Sponsor
- Johnson & Johnson Surgical Vision, Inc.
Freeman-Burian Syndrome, Freeman-Sheldon Syndrome
Survey Study and Records Review of Treatment Outcomes in Freeman-Sheldon Syndrome
The purpose of this study is to evaluate the difference in diagnosis accuracy, treatment outcomes, patient perspectives, facial function and walking ability, emotional and social health, and respiratory complications between…
- Conditions
- Freeman-Burian Syndrome, Freeman-Sheldon Syndrome, Whistling Face Syndrome, Sheldon-Hall Syndrome
- Trial name
- FINDFSS (NCT05419245)
- Testing
- Guided Health History for Freeman-Burian Syndrome Questionnaire, Freeman-Burian syndrome Semi-Structured Quality of Life Interview, Medical Records Review
- Where
- United States
- Volunteers
- 20 people
- Sponsor
- Dufresne, Craig, MD, PC
Retinal Perforations, Myopia, Degenerative
Corneal Flap Transplantation for Macular Hole Repair of High Myopia
The goal of this clinical trial is to learn about an innovative surgical technique for macular hole repair. This technique is for patients with high myopia using pars plana vitrectomy (PPV) combined with corneal flap…
- Trial name
- NCT05875909
- Testing
- corneal flap transplantation
- Where
- China
- Volunteers
- 30 people
- Sponsor
- First People's Hospital of Hangzhou
Cataract After, Astigmatism
Influence of Residual Astigmatism on Visual Acuity in Patients Undergoing Cataract Surgery With Trifocal Intraocular Lens Implantation
MAIN OBJECTIVE: To assess the influence of residual astigmatism on visual acuity in the different lens foci in patients operated on for cataracts with a trifocal intraocular lens implant.
- Conditions
- Cataract After, Astigmatism, IOL, Visual Acuity
- Trial name
- NCT04387721
- Testing
- Kind of trifocal IOL
- Where
- Spain
- Volunteers
- 48 people, healthy volunteers welcome
- Sponsor
- Enrique Ordiñaga-Monreal, OD, MSc
Refractive Errors, Myopia
Correlation Between Preoperative Refraction and Anterior Segment Parameters With ICL Vault
This prospective non-comparative interventional study aims to analyse the pre-operative factors affecting the range of optimal ICL vaulting.
- Conditions
- Refractive Errors, Myopia, Myopic Astigmatism
- Trial name
- NCT05670626
- Testing
- Refractive Surgery
- Where
- Egypt
- Volunteers
- 40 people, healthy volunteers welcome
- Sponsor
- Kasr El Aini Hospital