Clinical trials: Refractive Surgery
Keratoconus, Corneal Ectasia
Safety & Efficacy of Corneal Collagen Cross-Linking in Eyes With Keratoconus or Corneal Ectasia After Refractive Surgery
The objectives of this study are to evaluate and compare the safety and efficacy of three treatment regimens for corneal collagen cross-linking performed with VibeX (riboflavin ophthalmic solution) and the KXL System in impeding…
- Trial name
- NCT01459679
- Testing
- KXL System (15 mW/cm2), KXL System (30 mW/cm2), KXL System (45 mW/cm2)
- Where
- 83 sites in United States, Puerto Rico
- Volunteers
- 1,721 people
- Sponsor
- American-European Congress of Ophthalmic Surgery
Cataract
Total Corneal Astigmatism Prevalence in Cataract Patients
The purpose of this study is to report the prevalence data for total corneal astigmatism (TCA) in cataract surgery candidates.
- Trial name
- NCT06148857
- Testing
- IOLMaster 700
- Where
- China
- Volunteers
- 11,000 people
- Sponsor
- Peking University Third Hospital
Pediatric Cataract, IOL Implantation
Myopia Progression Control Using Atropine 0.05% After Pediatric Cataract Surgery And Intraocular Lens Implantation Surgery
Myopic shift remains a debilitating and unpredictable adverse event following pediatric cataract surgery. While research exploring peripheral myopic defocus for post-cataract surgery myopia prevention shows promising results, the…
- Conditions
- Pediatric Cataract, IOL Implantation, Myopia Progression
- Trial name
- NCT07364370
- Testing
- Atropine Eye drops
- Where
- Egypt
- Volunteers
- 50 people
- Sponsor
- Cairo University
Recruitment of Participants
Study of the Correlation Between Preoperative Precise Biometrics, Spatial Assessment and Postoperative Visual Quality in Cataract Patients
This study summarizes the experience of precision treatment and postoperative management of various types of cataract, and intend to further improve the quality of Clinical Cataract diagnosis and treatment.
- Trial name
- NCT04833491
- Where
- China
- Volunteers
- 1,000 people, healthy volunteers welcome
- Sponsor
- Second Affiliated Hospital, Zhejiang University, School of Medicine
Cataract, Epiretinal Membrane
Combined 25-gauge Vitrectomy and Cataract Surgery With Toric Intraocular Lens With Idiopathic Epiretinal Membrane.
Toric intraocular lens (IOL) is now widely used for the cataract surgery with preoperative corneal astigmatism. Symptomatic epiretinal membrane (ERM) is often treated with 25-gauge transconjunctival sutureless vitrectomy…
- Conditions
- Cataract, Epiretinal Membrane, Corneal Astigmatism
- Trial name
- NCT02328157
- Testing
- Vitrectomy with cataract surgery and toric IOL, Vitrectomy with cataract surgery and common IOL
- Where
- Japan
- Volunteers
- 30 people
- Sponsor
- Kagawa University
Presbyopia
CorVision® 4-year Follow-up
The objective of the study is to assess the long-term safety and effectiveness of the CorVision® microlens implanted in presbyopic patients for the management of management of presbyopia and near vision impairment.
- Trial name
- CorVision4yFU (NCT07623720)
- Where
- Czechia
- Volunteers
- 95 people
- Sponsor
- Gemini Eye Clinic
Keratoconus
Effects of Corneal Anatomical Match Between Donor and Recipient During DALK Surgery on Final Visual and Refractive Outcomes in Patients With KCN
Patients with KCN who undergo cornea transplantation divided to 2 groups: Group1: After mechanical trephination, horizontal meridian of donor's cornea sutured to horizontal meridian of recipient cornea Group 2: After mechanical…
- Trial name
- NCT04130334
- Testing
- After mechanical trephination, horizontal meridian of donor's cornea sutured to horizontal meridian of recipient cornea, : After mechanical trephination, horizontal meridian of donor's cornea sutured to vertical meridian of recipient cornea
- Where
- Iran
- Volunteers
- 52 people, healthy volunteers welcome
- Sponsor
- Shahid Beheshti University of Medical Sciences
MCS vs ReLACS, Pain Perception Postoperative
Manual Immediately Sequential Bilateral Cataract Surgery (M-ISBCS) vs Refractive Laser-Assisted Immediately Sequential Bilateral Cataract Surgery (ReLA-ISBCS)
The focus of this study is to assess the differences in patient perceptions of pain undergoing cataract surgery by using the Refractive Laser-Assisted Cataract Surgery (ReLACS) technique compared to the standard Manual Cataract…
- Conditions
- MCS vs ReLACS, Pain Perception Postoperative, Early Anesthesia vs Standard Anesthesia, Immediately Sequential Bilateral Cataract Surgery
- Trial name
- NCT05480839
- Testing
- M-IBCS, ReLA-IBCS Early, ReLA-ISBCS
- Where
- Canada
- Volunteers
- 100 people, healthy volunteers welcome
- Sponsor
- Uptown Eye Specialists
Strabismus Surgery
Refractive and Topographic Changes After Strabismus Surgery
Strabismus, characterized by a misalignment of the eyes, is a common condition that can result in functional and cosmetic issues, often affecting vision and binocular coordination.
- Trial name
- NCT06929130
- Volunteers
- 60 people
- Sponsor
- Assiut University
Bacterial Keratitis
Antibiotic Susceptibility of Conjunctival Bacterial Isolates From Refractive Surgery Patients
The purpose of this study is to determine the in vitro antibiotic susceptibility patterns of conjunctival bacterial flora isolated preoperatively from patients undergoing refractive surgery.
- Trial name
- NCT00707005
- Where
- South Korea
- Volunteers
- 105 people
- Sponsor
- Yonsei University
Eye Cyclorotation Degree, Pupil Shift
Evaluation of Position-induced Cyclorotation Between Wavefront Measurement and Refractive Surgery by the Iris Registration Method
Cyclorotation of eyes may be affected by motion and orientation of the head and body. An automated alignment method with the technique of iris recognition was used to assess the amount and orientation of position-induced…
- Trial name
- NCT00943163
- Where
- Taiwan
- Volunteers
- 93 people, healthy volunteers welcome
- Sponsor
- National Taiwan University Hospital
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
Myopia, Astigmatism
An Outcomes Study Comparing the Intralase FS 60 to the Intralase iFS When Performing LASIK Surgery for Nearsightedness
The purpose of the study is to compare the results of LASIK surgery when using two versions of a femtosecond laser in patients with nearsightedness with and without astigmatism.
- Trial name
- NCT01365728
- Testing
- LASIK with the iFS femtosecond laser
- Where
- United States
- Volunteers
- 61 people, healthy volunteers welcome
- Sponsor
- Stanford University
Corneal Ectasia
Safety and Efficacy Study for Corneal Collagen Cross-Linking in Eyes With Corneal Ectasia After Refractive Surgery
The objectives of this study are to evaluate the safety and efficacy of corneal collagen cross-linking performed with VibeX (riboflavin ophthalmic solution) and the KXL System as compared to placebo in impeding the progression…
- Trial name
- NCT01643252
- Testing
- riboflavin: 0.12% riboflavin ophthalmic solution with the KXL system
- Sponsor
- Glaukos Corporation
Anisometropic Amblyopia, Refractive Errors
Excimer Laser Surgery for Anisometropic Amblyopia
Study Objectives To compare the efficacy and safety of surgical treatment (PRK) versus non-surgical treatment of anisometropic amblyopia in children who have failed conventional treatment due to non-compliance or non-response.
- Trial name
- ATS19 (NCT03342235)
- Testing
- Photorefractive Keratectomy (PRK), Patching 2 hours per day, Excimer Laser System
- Sponsor
- Jaeb Center for Health Research
Traumatic Cataract
Long-term Visual and Refractive Outcomes After Traumatic Cataract Surgery in Children
This prospective multicenter observational study aims to evaluate long-term visual and ocular biometric outcomes in pediatric patients aged 0-16 years who were diagnosed with traumatic cataract and underwent cataract extraction…
- Trial name
- NCT07087275
- Where
- China
- Volunteers
- 600 people
- Sponsor
- Jin Yang
Dry Eye
The Effect Of Lifitegrast On Refractive Accuracy And Symptoms In Dry Eye Patients Undergoing Cataract Surgery
To determine if Xiidra® lifitegrast plays a role in the refractive accuracy when administered to patients preoperatively who are scheduled for cataract surgery and have a tear break up time (TBUT) ≤ 10 seconds and central corneal…
- Trial name
- NCT03866629
- Testing
- Lifitegrast
- Where
- United States
- Volunteers
- 103 people, healthy volunteers welcome
- Sponsor
- MDbackline, LLC
Keratoconus, Refractive Surgery
AI-Orchestrated Workflow Versus Consultant Ophthalmologist for Refractive Surgery and Keratoconus Diagnosis (AEYE Trial)
Background and Rationale: Laser vision correction procedures, such as LASIK (Laser-Assisted In Situ Keratomileusis), PRK (Photorefractive Keratectomy), and SMILE (Small Incision Lenticule Extraction), are highly effective but…
- Conditions
- Keratoconus, Refractive Surgery, Machine Learning, Artifical Intelligence
- Trial name
- AEYE (NCT07096232)
- Testing
- Multi-Agent AI Diagnostic Workflow (AEYE)
- Where
- Egypt
- Volunteers
- 50 people
- Sponsor
- Hazem Yassin Clinics
Congenital Cataract, Pediatric Cataract
Five-Year Visual Function and Refractive Outcomes After Congenital Cataract Surgery
This prospective multicenter observational study aims to evaluate the 5-year visual function and refractive outcomes in children undergoing surgery for congenital cataract.
- Trial name
- NCT07070037
- Where
- China
- Volunteers
- 400 people
- Sponsor
- Jin Yang
Cataract, Refractive Errors
Comparison of Intraocular Lens Power Calculation Methods After Corneal Laser Refractive Surgery in Axial and Refractive Ammertropia
The study aims at determining the best biometry calculation formula to be used in IOL calculation of cataract patients how previously underwent laser refractive correction surgery
- Trial name
- NCT01979172
- Where
- Egypt
- Volunteers
- 400 people, healthy volunteers welcome
- Sponsor
- The National Eye Hospital, Cairo, Egypt