Clinical trials: Astigmatism
Cataract, Astigmatism
Evaluation of Toric Intraocular Lens(IOL) Combined With Capsular Tension Ring(CTR) in Patients With Cataract Combined With High Myopia
The objective of this study is to evaluate the postoperative visual quality and IOL stability in patients with cataracts and high myopia who have undergone surgery using astigmatism-correcting IOLs in conjunction with tension…
- Conditions
- Cataract, Astigmatism, Intraocular Lens Rotation
- Trial name
- NCT06571773
- Testing
- intraoperative implantation of Capsular Tension Ring, none intraoperative implantation of CTR
- Where
- China
- Volunteers
- 72 people
- Sponsor
- Shanghai 10th People's Hospital
Corneal Astigmatism
Contribution of Posterior Corneal Astigmatism to Total Corneal Astigmatism in a Sample of Egyptian Population
The magnitude of posterior corneal astigmatism was considered negligible due to the smaller difference in the refractive index between the cornea and the aqueous .
- Trial name
- NCT04393740
- Testing
- scheimpflug imaging using pentacam
- Where
- Egypt
- Volunteers
- 356 people, healthy volunteers welcome
- Sponsor
- Cairo University
Myopia, Myopic Astigmatism
A Clinical Trial Assessing the Safety and Effectiveness of Orthokeratology Lenses in Patients With Myopia and Myopic Astigmatism
This is a prospective, multi-centre, single-arm clinical trial to evaluate the effectiveness and safety of MCOK-01 lenses in patients with myopia and myopic astigmatism who need dioptric correction.
- Trial name
- SEMOA (NCT07047924)
- Testing
- MCOK-01
- Where
- 4 sites in Australia
- Volunteers
- 220 people
- Sponsor
- Menicon Co., Ltd.
Ocular Surface Disease, Irregular Astigmatism
Evaluation of the Safety and Efficacy of Rigid Breathable Scleral Contact Lenses for the Correction of Ametropia
To evaluate the short-term efficacy and safety of scleral contact lens in the clinical treatment of patients with irregular astigmatism after corneal transplantation by analyzing ocular parameters and ocular surface conditions of…
- Conditions
- Ocular Surface Disease, Irregular Astigmatism, Contact Lens Complication, Corneal Astigmatism
- Trial name
- NCT06256770
- Where
- China
- Volunteers
- 176 people, healthy volunteers welcome
- Sponsor
- Tianjin Eye Hospital
Astigmatism
Evaluate the Safety and Effectiveness of the Biotrue ONEday for Astigmatism
Comparing Test Lens for Astigmatism Soft Contact Lens (Test) to 1-Day Control for Astigmatism contact lenses (Control).
- Trial name
- NCT03681808
- Testing
- Control, Test
- Where
- 13 sites in United States
- Volunteers
- 242 people, healthy volunteers welcome
- Sponsor
- Bausch & Lomb Incorporated
Astigmatism
Observational Study - TA- 2025-1
This multi-centric, prospective observational study collects biometric datasets as well as associated video recordings of the surgical procedure.
- Trial name
- TA OS 2025-1 (NCT07007897)
- Testing
- Optical Biometry, Cataract Surgery
- Where
- 2 sites in United States
- Volunteers
- 100 people
- Sponsor
- Haag-Streit AG
Cataract, Lens Opacities
PMCF Study on Monofocal Toric IOL (PODEYE TORIC) in Asia
This is a single-center, prospective, open-label PMCF study whereby patients undergoing routine cataract surgery will have mono- or bilateral implantation of hydrophobic acrylic monofocal toric intraocular lens PODEYE TORIC…
- Conditions
- Cataract, Lens Opacities, Astigmatism
- Trial name
- PHY2102 (NCT04778501)
- Testing
- IOL implantation experimental
- Where
- Philippines
- Volunteers
- 45 people
- Sponsor
- Beaver-Visitec International, Inc.
Astigmatism
Clinical Evaluation of Two Toric Contact Lenses in Current Non-toric Lens Users
The purpose of this study is to evaluate the clinical performance, defined as successful fit, of two toric contact lenses (one daily disposable and the other daily wear reusable contact lens to correct astigmatism) in current…
- Trial name
- NCT01180998
- Testing
- Senofilcon A Toric (AOfA), Etafilcon A Toric (1DAMfA)
- Where
- 18 sites in United Kingdom
- Volunteers
- 200 people, healthy volunteers welcome
- Sponsor
- Johnson & Johnson Vision Care, Inc.
Myopia
Comparison Between FS- LASIK and FS-SMILE for Correction of Myopia and Myopic Astigmatism
Aim of the work is to compare the results of femtosecond assisted LASIK and small incision lenticule extraction (SMILE) as regards safety, efficacy and predictability.
- Trial name
- NCT02962544
- Testing
- FS-SMILE, FS- LASIK, Visumax device
- Where
- Egypt
- Volunteers
- 60 people
- Sponsor
- Kasr El Aini Hospital
Aphakia, Astigmatism
Evaluation of Long-term Safety and Performance of PanOptix Trifocal Intraocular Lens (IOL)
The purpose of this Post-Market Clinical Follow-up (PMCF) study is to describe the long-term safety and performance of the AcrySof IQ PanOptix IOL toric and non-toric models in subjects bilaterally implanted with these IOLs for 3…
- Conditions
- Aphakia, Astigmatism, Presbyopia
- Trial name
- NCT06166901
- Testing
- AcrySof IQ PanOptix IOL Toric, AcrySof IQ PanOptix IOL Non-Toric
- Where
- 7 sites in Spain
- Volunteers
- 211 people
- Sponsor
- Alcon Research
Myopia, Astigmatism
Toric Orthokeratology - Slowing Eye Elongation
The aims of this study are to investigate the effects of ortho-k for astigmatic and myopic reduction and myopic control in children, and the long term effects on corneal curvatures and biomechanics.
- Trial name
- TO-SEE (NCT00978692)
- Testing
- Toric Orthokeratology lenses, Single-vision spectacles
- Where
- China
- Volunteers
- 80 people, healthy volunteers welcome
- Sponsor
- The Hong Kong Polytechnic University
Astigmatism
Hydrophobic Acrylic Toric IOL Designed to Reduce the Effects of Preoperative Corneal Astigmatism
The investigational enVista IOL, Model MX60Tis equipped with toric optics and axis marks on the posterior surface to minimize the possibility of surgically induced astigmatism.
- Trial name
- NCT01852084
- Testing
- enVista® One-Piece Hydrophobic Acrylic Toric IOL, enVista control lens
- Where
- United States
- Volunteers
- 191 people
- Sponsor
- Bausch & Lomb Incorporated
Myopic Astigmatism
STAAR Visian Toric ICL Post-Approval Study
The objective of this study is to evaluate the long term (i.e. 24 months) clinical performance of the Visian® Toric Implantable Collamer® Lens (ICL).
- Trial name
- TICL-PAS (NCT04516772)
- Testing
- Visian TICL
- Where
- 8 sites in United States
- Volunteers
- 125 people
- Sponsor
- Staar Surgical Company
Myopia
Evaluation of Alcon Ladarvision Wavefront-Guided PRK
The purpose of this study is to: 1. determine the safety of wavefront guided PRK 2. evaluate the efficacy of wavefront guided PRK 3. evaluate the differences in visual quality after treatment of wavefront guided PRK
- Trial name
- NCT00412295
- Testing
- Alcon Ladarvision (Wavefront-guided PRK)
- Where
- 2 sites in United States
- Volunteers
- healthy volunteers welcome
- Sponsor
- Walter Reed Army Medical Center
Astigmatism, Phacoemulsification
Effectiveness and Safety of Limbal Relaxing Incisions for Correcting Post Phacoemulsification High Astigmatism
To compare the effect of Limbal relaxing incisions (LRIs) plus spectacle correction versus spectacle correction alone on subjective and objective improvement in visual function for correcting post phacoemulsification high…
- Trial name
- NCT06896357
- Testing
- Limbal relaxing incisions
- Volunteers
- 30 people
- Sponsor
- Assiut University
Corneal Astigmatism, Orientation
Construction of Computerized Intraoperative Keratometer and Experimental Study
To construct a computerized intraoperative keratometer to analyze the axis of corneal astigmatism accurately as well as rapidly by self-designed software during surgery.
- Trial name
- NCT01636167
- Testing
- computerized intraoperative keratomer
- Where
- China
- Volunteers
- 60 people
- Sponsor
- Wenzhou Medical University
Eye Diseases, Postcataract Aphakia
Investigation of the Safety and Effectiveness of Monofocal Toric Intraocular Lens (IOL)
This study is a prospective, multicenter, randomized, double masked trial comparing an investigational Monofocal Toric intraocular lens (IOL) (PODEYE TORIC CYL 1.5 D) and a commercially available non-toric monofocal IOL.
- Conditions
- Eye Diseases, Postcataract Aphakia, Cataract, Lens Opacities
- Trial name
- NCT06399211
- Testing
- PODEYE TORIC Monofocal IOL, Alcon AcrySof SA60AT Monofocal IOL
- Volunteers
- 261 people
- Sponsor
- Beaver-Visitec International, Inc.
Myopia (Disorder), Astigmatism
Optical Quality of the Cornea in Orthokeratology
Analyzing Optical Quality After the Use of Overnight Orthokeratology (Ortho-K)
- Trial name
- COPCORTO (NCT06775509)
- Testing
- Ortho-K
- Where
- Spain
- Volunteers
- 23 people, healthy volunteers welcome
- Sponsor
- Institut Investigacio Sanitaria Pere Virgili
Myopia, Hyperopia
Comparative Evaluation of Corneal Staining With Balafilcon A Lenses and Two Multi-Purpose Solutions
A new multi-purpose solution (MPS)was clinically evaluated against Opti-Free RepleniSH MPS at specific time points over the course of four days. The study was conducted with PureVision lenses.
- Conditions
- Myopia, Hyperopia, Astigmatism
- Trial name
- NCT01024855
- Testing
- RevitaLens OcuTec MPS (Investigational MPS) and Opti-Free RepleniSH MPS (control)
- Where
- United States
- Volunteers
- 30 people, healthy volunteers welcome
- Sponsor
- Abbott Medical Optics
Astigmatism
Bilateral Dispensing Clinical Trial of Stenfilcon A Against Etafilcon A for Astigmatism
Bilateral dispensing clinical trial of stenfilcon A against etafilcon A for astigmatism.
- Trial name
- NCT02410824
- Testing
- stenfilcon A toric lens, etafilcon A toric lens
- Where
- 2 sites in United States, Canada
- Volunteers
- 52 people
- Sponsor
- CooperVision, Inc.