Healthy Clinical Trial - Test of QLS Device to Detect Early Cataracts

Status Completed

Clinical Trial Summary

This study will test the reliability of an instrument called the Quasi Elastic Laser Scattering Device (QLS) in detecting early changes in cataract formation.

Surgery is currently the only treatment for cataracts. Many laboratories, however, are researching drugs to reverse, delay or prevent cataract formation. Anti-cataract drugs presumably would be most effective given early in the course of disease. When clinical trials of these drugs are begun, dependable and standardized methods for documenting and monitoring lens opacities will be needed to test their effectiveness. The QLS was designed to detect the earliest molecular changes in cataract development. This study will evaluate the usefulness and reliability of this instrument in measuring these changes.

Normal volunteers and patients with cataracts in this study will have a standard eye examination, including a vision test and eye pressure measurement. The pupils will be dilated for QLS testing and for examination of the retina. Photographs of the retina may be taken. The QLS test uses a very dim laser light similar to that used to scan grocery items in the supermarket. The laser beam is projected into the lens of the eye, and the scattered light is collected and analyzed to determine normal and abnormal molecular interactions in the lens. Two measurements will be done for each eye. The test will be repeated in 6 months to determine reproducibility of the system.

Clinical Trial Description

Recently, a device has been created to determine molecular interactions that occur in the nucleus of the lens, called Quasi Elastic Laser Scattering Device (QLS). Preliminary studies have shown its potential in the detection of the earliest changes occurring in cataract, at the stage where anticataract treatment would theoretically be most effective in reversing, delaying or preventing cataracts. A new miniaturized version of this device has been developed by NASA using low energy lasers and offered for further development and testing at the NEI. We therefore propose to conduct a preliminary study to evaluate the usefulness and reproducibility of this instrument for quantitating lens changes. ;

Study Design

N/A

Related Conditions & MeSH terms

Clinical Trial Details

NCT number	NCT00001617
Study type	Observational
Source	National Institutes of Health Clinical Center (CC)
Contact
Status	Completed
Phase	N/A
Start date	September 1997
Completion date	August 2000

View Details

See also
Status	Clinical Trial	Phase
Recruiting	`NCT06052553` - A Study of TopSpin360 Training Device	N/A
Completed	`NCT05511077` - Biomarkers of Oat Product Intake: The BiOAT Marker Study	N/A
Recruiting	`NCT04632485` - Early Detection of Vascular Dysfunction Using Biomarkers From Lagrangian Carotid Strain Imaging
Completed	`NCT05931237` - Cranberry Flavan-3-ols Consumption and Gut Microbiota in Healthy Adults	N/A
Terminated	`NCT04556032` - Effects of Ergothioneine on Cognition, Mood, and Sleep in Healthy Adult Men and Women	N/A
Completed	`NCT04527718` - Study of the Safety, Tolerability and Pharmacokinetics of 611 in Adult Healthy Volunteers	Phase 1
Completed	`NCT04065295` - A Study to Test How Well Healthy Men Tolerate Different Doses of BI 1356225	Phase 1
Completed	`NCT04998695` - Health Effects of Consuming Olive Pomace Oil	N/A
Completed	`NCT04107441` - AX-8 Drug Safety, Tolerability and Plasma Levels in Healthy Subjects	Phase 1
Completed	`NCT01442831` - Evaluate the Absorption, Metabolism, And Excretion Of Orally Administered [14C] TR 701 In Healthy Adult Male Subjects	Phase 1
Terminated	`NCT05934942` - A Study in Healthy Women to Test Whether BI 1358894 Influences the Amount of a Contraceptive in the Blood	Phase 1
Recruiting	`NCT05525845` - Studying the Hedonic and Homeostatic Regulation of Food Intake Using Functional MRI	N/A
Completed	`NCT05515328` - A Study in Healthy Men to Test How BI 685509 is Processed in the Body	Phase 1
Completed	`NCT04967157` - Cognitive Effects of Citicoline on Attention in Healthy Men and Women	N/A
Completed	`NCT05030857` - Drug-drug Interaction and Food-effect Study With GLPG4716 and Midazolam in Healthy Subjects	Phase 1
Recruiting	`NCT04494269` - A Study to Evaluate Pharmacokinetics and Safety of Tegoprazan in Subjects With Hepatic Impairment and Healthy Controls	Phase 1
Recruiting	`NCT04714294` - Evaluate the Safety, Tolerability and Pharmacokinetics Characteristics of HPP737 in Healthy Volunteers	Phase 1
Completed	`NCT04539756` - Writing Activities and Emotions	N/A
Recruiting	`NCT04098510` - Concentration of MitoQ in Human Skeletal Muscle	N/A
Completed	`NCT03308110` - Bioavailability and Food Effect Study of Two Formulations of PF-06650833	Phase 1

Clinical trials are conducted in a series of steps, called phases - each phase is designed to answer a separate research question.

Phase 1: Researchers test a new drug or treatment in a small group of people for the first time to evaluate its safety, determine a safe dosage range, and identify side effects.
Phase 2: The drug or treatment is given to a larger group of people to see if it is effective and to further evaluate its safety.
Phase 3: The drug or treatment is given to large groups of people to confirm its effectiveness, monitor side effects, compare it to commonly used treatments, and collect information that will allow the drug or treatment to be used safely.
Phase 4: Studies are done after the drug or treatment has been marketed to gather information on the drug's effect in various populations and any side effects associated with long-term use.