Impact of Red Light Therapy on Alleviating Visual Fatigue in Presbyopes
Launched by THE HONG KONG POLYTECHNIC UNIVERSITY · Dec 17, 2024
Trial Information
Current as of June 26, 2025
Not yet recruiting
Keywords
ClinConnect Summary
This clinical trial is examining how effective red light therapy is in reducing visual fatigue, also known as asthenopia, in people aged 40 and older who have trouble focusing on close objects, a common issue called presbyopia. Visual fatigue can cause discomfort and affect daily activities, so finding ways to relieve these symptoms is important. The study will involve around 66 participants who report experiencing visual fatigue and need help with close-up vision. Eligible individuals will be randomly assigned to either use a red light therapy device for a few minutes each day or a similar-looking sham device that doesn’t provide therapy.
Participants can expect to visit the PolyU Optometry Clinic for an initial examination to determine their eligibility. If selected, they will use the assigned device twice a day for one month and will have their symptoms and visual functions checked at two points during the study. This research aims to better understand if red light therapy can help reduce visual fatigue, improve thinking abilities, and enhance emotional well-being in people experiencing these challenges.
Gender
ALL
Eligibility criteria
- Inclusion Criteria:
- • Individuals aged over 40 years old.
- • Self-reported visual fatigue symptoms.
- • Distance best-corrected visual acuity (BCVA) of 0.5 LogMAR or better, and near visual acuity worse than N8 (20/50) at 40 cm with the subject's habitual distance correction.
- • Require near correction in daily life.
- • No light therapy received in the past six months.
- • Giving informed written consent.
- Exclusion Criteria:
- • Presence of diseases that can cause eye pain or headaches, such as strabismus, glaucoma, ocular trauma, conjunctivitis, migraines, keratitis, iridocyclitis, or other self-reported diseases.
- • Systemic diseases (e.g., epilepsy, photosensitivity, seizure) or illiteracy.
- • Afterimage time longer than 6 minutes.
About The Hong Kong Polytechnic University
The Hong Kong Polytechnic University (PolyU) is a leading institution in applied research and education, dedicated to advancing knowledge and innovation in various fields, including health sciences. As a clinical trial sponsor, PolyU focuses on conducting rigorous and ethically sound research to enhance understanding of medical interventions and improve patient outcomes. The university leverages its multidisciplinary expertise, state-of-the-art facilities, and collaboration with industry partners to facilitate groundbreaking studies that address pressing health challenges. Committed to fostering an environment of academic excellence, PolyU aims to translate research findings into practical solutions that benefit society and contribute to the global advancement of healthcare.
Contacts
Jennifer Cobb
Immunology at National Institute of Allergy and Infectious Diseases (NIAID)
Locations
Patients applied
Timeline
First submit
Trial launched
Trial updated
Estimated completion
Not reported