Clinical trials: Intraocular Lens Calculation
Cataract
AI-Driven IOL Prediction Using SS-OCT Biometry
This prospective, multicenter, non-interventional observational study aims to evaluate the agreement between a novel swept-source optical coherence tomography (SS-OCT) biometer and the IOLMaster 700 for ocular biometric…
- Trial name
- NCT07733154
- Testing
- IOLMaster 700, Novel SS-OCT Biometer
- Where
- 3 sites in Australia, China and 1 more
- Volunteers
- 2,500 people
- Sponsor
- The Hong Kong Polytechnic University
Dry Eye Disease (DED), Cataract
Impact of DED on the Accuracy of Preoperative Keratometry Values in the Calculation of IOL Power for Cataract Surgery.
This study looks at how dry eye disease can affect important eye measurements needed before cataract surgery. These measurements guide us in choosing the right artificial lens to implant, which is essential for achieving clear…
- Trial name
- NCT06989827
- Testing
- Preservative free artificial tear
- Where
- Croatia
- Volunteers
- 100 people, healthy volunteers welcome
- Sponsor
- University Hospital Sestre Milosrdnice
Cataract
Intraocular Lens (IOL) Calculation Improvement
Intraocular Lens (IOL) formulas sometimes differ from expected. Using novel measurement methods before and after cataract surgery improved formulas are tried be developed.
- Trial name
- NCT01372657
- Testing
- biometry calculation
- Where
- Switzerland
- Volunteers
- 11 people
- Sponsor
- University Hospital, Basel, Switzerland
Rhegmatogenous Retinal Detachment, Hypotony Ocular
Ocular Hypotony and Refractive Predictability in RRD Surgery
This study evaluates how preoperative ocular hypotony (Goldmann IOP ≤ 7 mmHg) affects refractive predictability, axial length measurements, and visual outcomes in patients undergoing combined phacovitrectomy with silicone oil for…
- Trial name
- HYP-RRD (NCT07283614)
- Testing
- Combined Phacovitrectomy with Intraocular Lens Implantation and Silicone Oil Tamponade, Silicone Oil Removal
- Where
- Kazakhstan
- Volunteers
- 45 people
- Sponsor
- Kazakh Eye Research Institute
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
Intraocular Lens Implantation, Cataract
Intraoperative Aberrometry vs Conventional Intraocular Lens Calculation, a Prospective Study.
the goal of this intervention study is to compare prospectively the accuracy of the power calculation between both groups, the intraoperative aberrometry (ORA) vs barrett universal II preoperative calculation (control group) .
- Conditions
- Intraocular Lens Implantation, Cataract, Humans, Ocular, Refraction
- Trial name
- ORAVSCTRL (NCT06219252)
- Testing
- Intraoperative aberrometer, Preoperative intraocular lens calculation
- Where
- Mexico
- Volunteers
- 300 people, healthy volunteers welcome
- Sponsor
- Instituto de Oftalmología Fundación Conde de Valenciana
Cataract
Comparison of the Accuracy of Different Intraocular Lens Power Calculation Formulas in Cataract Patients With Prior Radial Keratotomy
The Web-based Barret True K formula with no history formula has been proven to be a good choice for cataract patients after RK in several studies.
- Trial name
- NCT06354296
- Volunteers
- 50 people
- Sponsor
- He Eye Hospital
Cataract
Intraocular Lens Power Calculation Using Pre- and Intra-operative Measurements
Recently a prototype of a combination of an anterior segment OCT (VISANTE; Carl Zeiss Meditec AG) and an operating microscope (OPMI 200; Carl Zeiss Meditec AG) was introduced that allows measurements of the crystalline lens as…
- Trial name
- NCT02513134
- Where
- Austria
- Volunteers
- 75 people
- Sponsor
- Prim. Prof. Dr. Oliver Findl, MBA
Cataract
Intraocular Lens Calculation Using Artificial Intelligence
The aim of this study is to investigate the lens diameter (LD) as a useful parameter in intraocular lens (IOL) power calculation by using several different non-invasive imaging techniques.
- Trial name
- NCT07202767
- Testing
- Swept-Source Anterior Segment OCT
- Where
- Austria
- Volunteers
- 170 people
- Sponsor
- Johannes Kepler University of Linz
Cataract
Level of Agreement of Intraocular Lens Power Measurements Between IOLMaster and Verion
Primary objective of this study is to evaluate the level of agreement of two keratometry modules, the IOLMaster and the Verion Reference Unit, in terms of keratometric values and IOL power calculation.
- Trial name
- NCT03876782
- Testing
- IOLMaster, Verion
- Where
- Greece
- Volunteers
- 54 people
- Sponsor
- Democritus University of Thrace
Intraocular Lens
Comparison of Two Different Methods for Calculating Intraocular Lens Tilt and Decentration
Agreement and Reproducibility of Intraocular Lens Tilt and Decentration Measurements: A Comparison between CASIA2 and CILT
- Trial name
- NCT07025707
- Where
- Austria
- Volunteers
- 15 people
- Sponsor
- St John of God Hospital, Vienna
Pterygium, Cataract
Surgical Treatment of Concurrent Cataract and Primary Pterygium
Pterygium is known to induce with-the-rule astigmatism. The corneal curvature along the long axis of the pterygium body is flattened. The excision of pterygium will result in steepening of the cornea and reduction of astigmatism.
- Conditions
- Pterygium, Cataract, Lenses, Intraocular
- Trial name
- NCT00563277
- Testing
- combined pterygium and cataract operation, pterygium excision followed by cataract operation
- Where
- 3 sites in China
- Volunteers
- 75 people
- Sponsor
- Hospital Authority, Hong Kong
Lens Diseases
Accuracy of Intra Ocular Lens CARLEVALE Calculation
The purpose of this study is to assess the accuracy of intra ocular lens power calculation using the new Carlevale sutureless scleral fixation posterior chamber intra ocular lens.
- Trial name
- NCT05368870
- Testing
- Carlevale implantation
- Where
- France
- Volunteers
- 40 people
- Sponsor
- Poitiers University Hospital
Intraocular Lens Calculation, Combined Phaco-vitrectomy
Intraocular Lens Power Calculation for Combined Phaco-vitrectomy Procedures
The aim of the study is to evaluate the degree of refractive error postoperatively in combined procedures and to calculate a new constant in order to improve current state of the art biometry calculations.
- Trial name
- NCT03856346
- Testing
- Biometry
- Where
- Switzerland
- Volunteers
- 200 people, healthy volunteers welcome
- Sponsor
- Cantonal Hospital of St. Gallen
Cataract
High Resolution Immersion Ultrasound for iIOL Power Calculation
Assess is the additional use of high resolution immersion ultrasound measurements improve the refractive outcome after cataract surgery.
- Trial name
- NCT03749486
- Testing
- Cataract surgery
- Where
- Austria
- Volunteers
- 40 people
- Sponsor
- Prim. Prof. Dr. Oliver Findl, MBA
Cataract
Check of Optical Features and Accuracy of the Zeiss ZO Lens After Selection and Calculation With OKULIX
It is planned to implant the intraocular lenses XL Stabi ZO and Invent ZO into the eyes of patients for whom a cataract operation is medically indicated. The lenses are marketed and CE certified.
- Trial name
- ZO Okulix (NCT00842959)
- Testing
- Invent ZO, XL Stabi ZO
- Where
- Germany
- Volunteers
- 120 people
- Sponsor
- Carl Zeiss Meditec AG
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
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
Pseudophakia
The Effects of Angle Kappa on Clinical Outcomes With the PanOptix Intraocular Lens
Angle Kappa is considered a potential factor in explaining suboptimal outcomes with intraocular lenses (IOLs), particularly multifocal IOLs. Some evidence suggests this is not the case.
- Trial name
- NCT04242875
- Testing
- Angle Kappa, Visual disturbance questionnaire.
- Where
- United States
- Volunteers
- 30 people
- Sponsor
- Carolina Eyecare Physicians, LLC
Calculation of Intraocular Lens in High Myopic Cataractous Patients
Comparison Between Different Investigations Used in Intraocular Lens Calculation in High Myopic Cataractous Patients
the purpose of the study is to compare the accuracy of optical and ultrasonic biometry in intraocular lens (IOL) calculation in high myopic cataractous patients
- Trial name
- NCT04952181
- Testing
- optical biometry, ultrasonic biometry
- Volunteers
- 40 people, healthy volunteers welcome
- Sponsor
- Sohag University