Study on circadian hormones in school children wearing blue light-blocking eyeglasses before bedtime

Not Applicable

• Conditions: ormal volunteers

• Registration Number: JPRN-UMIN000047256
• Lead Sponsor: Sleep and Circadian Neurobiology Laboratory, Stanford University School of Medicine

Brief Summary

Not available

Detailed Description

Not available

Study Timeline

• Results First Posted: 1900-01-01
• Study Start: 2022-04-01
• Study Completion: 2022-07-31
• Last Update Posted: 17 October 2023

Recruitment & Eligibility

• Status: Complete: follow-up complete
• Sex: Male
• Target Recruitment: 40

Inclusion Criteria

Not provided

Exclusion Criteria

(1) Regularly wears in daily life the following lenses that cannot be prepared to the specifications of the lenses used in the study Lenses with refractive powers outside the following range (myopia prescriptions: SPH: -8.00 to 0 D, CYL: -4.00 to 0 D, hyperopia prescriptions: SPH: 0 to +4.00 D, CYL: 0 to +4.00 D) or non-monofocal lenses such as progressive lenses and prismatic lenses (2) The refractive power of the eyeglasses requires remeasurement in the hospital or ophthalmology department because it is realized that the refractive power of the eyeglasses regularly used in daily life is not suitable. (3) The refractive power of the eyeglasses regularly used in daily life cannot be tested at an eyeglass store. (4) Takes oral medications, supplements, etc., that affect sleep, the autonomic nervous system, or the central nervous system. (5) Has previous or complicating sleep disorders, mental illness, immunologic/allergic diseases, metabolic disorders, corneal disorders, retinal disorders, dry eye, asthenopia, or the like (6) Requires pharmacotherapy for pollinosis, etc. (7) Has infection designated by the Infectious Disease Law or bloodborne infection (e.g., HBV, HCV, HIV, or syphilis) (including close contact with such diseases) (8) Cannot wear correctly the testing instrument before going to bed under the guidance of a legal guardian (9) Has irregular sleep habits (10) Planned changes in living environment during study participation (11) Deemed otherwise unsuitable for the study by the investigator

Study & Design

• Study Type: Interventional
• Study Design: Not specified

Primary Outcome Measures

Name	Time	Method
Evaluation of salivary melatonin concentration

Secondary Outcome Measures

Name	Time	Method
1. Evaluation of circadian rhythm 2. Evaluation of sleepiness, mood, and motivation (modified NRS sleep scale) 3. Evaluation of quality and quantity of sleep (elementary school student version of the children's sleep questionnaire/chronotype evaluation)