Clinical trials: Biometrics Measurement
Cataract
Ocular Biometrics in a French Population
The investigators aimed to study ocular biometrics parameters and their association with age, gender and the prevalence of high myopia in a population of cataract surgery candidates in the South of France.
- Trial name
- NCT04992403
- Where
- France
- Volunteers
- 11,650 people
- Sponsor
- University Hospital, Montpellier
Healthy
Influence of Artificial Tears on Keratometry and Biometry Measurements With Different Devices
The goal of this clinical trial is to learn about the influence of artificial tears on measurements of healthy eyes with three different devices.
- Trial name
- NCT06358456
- Testing
- Artificial tear, No artificial tears
- Where
- Germany
- Volunteers
- 145 people, healthy volunteers welcome
- Sponsor
- University Clinic Frankfurt
Birth Weight, Fetal Body Weight
Cross Sectional Area of Umbilical Cord Versus Hadlock's Formula in Prediction of Neonatal Birth Weight
Ultrasound measurement of cross sectional area of umbilical cord might offer advantage over Hadlock's formula for accurate estimation of actual birth weight at term gestation leading to prevention of large number of maternal and…
- Trial name
- NCT05362175
- Testing
- Obstetric ultrasound
- Where
- Egypt
- Volunteers
- 220 people, healthy volunteers welcome
- Sponsor
- Ain Shams University
Myopia
Assessment of Measurement Variability Across Automated Biometry Devices
This is a non-interventional prospective, comparative study of white-to-white, corneal thickness, and anterior chamber depth measurements as taken on the Orbscan II compared to the IOL Master 700 (Zeiss), IOL Master 500 (Zeiss)…
- Trial name
- NCT06045325
- Testing
- Orbscan II, IOL Master 700, IOL Master 500
- Where
- United States
- Volunteers
- 204 people, healthy volunteers welcome
- Sponsor
- Berkeley Eye Center
Smoking ( Cigarette), Cornea
Acute Ocular Effects of Cigarette Smoking
This prospective study aims to evaluate the short-term effects of smoking on corneal tomographic and biometric measurements in healthy adults.
- Conditions
- Smoking ( Cigarette), Cornea, Anterior Eye Segment Measurements
- Trial name
- NCT07580040
- Testing
- Cigarette Smoking Exposure, No Smoking Exposure
- Where
- Turkey (Türkiye)
- Volunteers
- 90 people, healthy volunteers welcome
- Sponsor
- Istanbul University
Small for Gestational Age Infant, Fetal Growth Restriction
Developing and Testing AI Models for Fetal Biometry and Amniotic Volume Assessment in Fetal Ultrasound Scans.
Routine fetal ultrasound scan during the second trimester of the pregnancy is a low-cost, noninvasive screening modality that has been proven to lower fetal mortality by up to 20%.
- Conditions
- Small for Gestational Age Infant, Fetal Growth Restriction, Oligohydramnios, Polyhydramnios
- Trial name
- NCT05059093
- Testing
- Classification and segmentation deep learning models
- Where
- 6 sites in Morocco
- Volunteers
- 122 people, healthy volunteers welcome
- Sponsor
- Deepecho
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
Pseudophakic Anterior Chamber Depth Measurement in Second Eye Refinement Cataract Surgery
To study the effective lens position concept in second eye refinement (SER) cataract surgery, by relating inter-ocular symmetry of pseudophakic anterior chamber depth (pACD) measured in Pentacam and SER refractive outcomes.
- Trial name
- NCT02423668
- Testing
- 50% Partial adjustment, No adjustment, Full adjustment
- Volunteers
- 88 people
- Sponsor
- Centro Hospitalar do Baixo Vouga
Child Development
Dongguan Eye Study of Schoolchildren and Adolescents（DESSA）
This is a study to report the change of ocular biometry of schoolchildren and adolescents as well as its association with birth parameters in China.
- Trial name
- NCT03409094
- Where
- China
- Volunteers
- healthy volunteers welcome
- Sponsor
- Sun Yat-sen University
Holistic Care, Mental Health
Using Integrated Care and Wearable Technology to Evaluate Outcomes of the Shields & Stripes Program for Veterans and First Responders
This study aims to evaluate outcomes from the Shields \& Stripes (S\&S) program - a 12-week, multidisciplinary wellness intervention designed for veterans and first responders.
- Conditions
- Holistic Care, Mental Health, Sleep, PTSD
- Trial name
- S&S Wellness (NCT07452900)
- Where
- United States
- Volunteers
- 80 people
- Sponsor
- Baylor University
Dry Eye, Cataract
Effect of Dry Eye Treatment on Corneal Astigmatism Measurements
This prospective single-center study evaluates the effect of dry eye disease and short-term ocular surface treatment on the agreement and repeatability of corneal astigmatism measurements in patients with age-related cataract.
- Trial name
- NCT07657858
- Testing
- Sodium Hyaluronate Eye Drops
- Where
- China
- Volunteers
- 400 people
- Sponsor
- Jin Yang
Cataract, Cornea
Agreement and Accuracy of Different Devices for Biometry Measurements in Patients With Cataract
The rationale of this study is to compare repeatability, reproducibility and agreement of three different AS-OCT devices and Pentacam.
- Conditions
- Cataract, Cornea, Surgery
- Trial name
- Comparison (NCT04323358)
- Testing
- Biometry, Keratometry
- Where
- Austria
- Volunteers
- 50 people
- Sponsor
- Medical University of Vienna
Cataract Senile
Repeatability in Measurements of Two ssOCT and One OLCR Biometer
Achieving high accuracy and precision in ocular biometry has become primordial for cataract surgery, due to the shift of cataract surgery from a rehabilitation procedure to a refractive one.
- Trial name
- NCT04255706
- Testing
- biometric measurement IOLMaster 700, biometric measurement Lenstar LS 700, biometric measurement Anterion Heildelberg
- Where
- Austria
- Volunteers
- 50 people
- Sponsor
- Prim. Prof. Dr. Oliver Findl, MBA
Pseudoaphakia
Time Study for Biometry Measurements With the Lenstar and IntraOcularLens (IOL) Master 500
The objectives of this study are to determine the time needed to complete a full set of measurements (Total Ophthalmic Exam, Subject Data Entry and Acquisition of the Measurement) by each test device, the Lenstar 900 Version i4…
- Trial name
- NCT01550939
- Testing
- Ophthalmic Biometer
- Where
- United States
- Volunteers
- 61 people, healthy volunteers welcome
- Sponsor
- Haag Streit USA
Cataract
Effect of Artificial Tears on Biometry
The purpose of this study is to determine if measurements for cataract surgery are improved with use of additional lubrication with artificial tears.
- Trial name
- NCT04230720
- Testing
- Systane Complete
- Where
- United States
- Sponsor
- Weill Medical College of Cornell University
Cataract, Lens Opacities
Feasibility Investigation of Biometry and Tomography Measurements in a Heterogeneous Patient Cohort
The planned clinical investigation will be conducted to acquire raw data for the development of the algorithm. The data acquisition is intended to obtain first impressions of the potential performance of the changed hardware and…
- Conditions
- Cataract, Lens Opacities, Artificial Lens Implant, Corneal Astigmatism
- Trial name
- BioBase (NCT05458661)
- Testing
- Clinical Prototype BioBase (SN 07 and SN 08)
- Volunteers
- 100 people, healthy volunteers welcome
- Sponsor
- Carl Zeiss Meditec AG
Biometrics Measurement
Validation of In-Ear Sensor
The purpose of this study is to clinically validate noninvasive in-ear sensor.
- Trial name
- NCT04680871
- Testing
- In-Ear Sensor
- Where
- United States
- Volunteers
- healthy volunteers welcome
- Sponsor
- Starkey Laboratories, Inc
Anterior Segment of Eye, Axial Length
Agreement of Two OCT Biometers: A Pilot Study
The purpose of this study is to compare the measurements obtained with two different biometers, UNITY Dx and Anterion. In eye care, a biometer is a device that uses laser technology to take highly precise measurements of the…
- Conditions
- Anterior Segment of Eye, Axial Length, Biometrics Measurement
- Trial name
- NCT07782619
- Testing
- UNITY DX, ANTERION
- Where
- United States
- Volunteers
- 50 people
- Sponsor
- Alcon Research