Effects of HFMH-EMS on Ocular Artery Circulation

The Effects of High-Frequency Multiband Harmonic Electromagnetic Stimulation (HFMH-EMS) on Ocular Artery Circulation After Prolonged Smartphone Usage

Status

Completed

Phases

Study type

Interventional

Source

ClinicalTrials.gov

Registry ID

NCT06861985

Enrollment

Registered

2025-03-06

Start date

2023-09-20

Completion date

2023-12-31

Last updated

2025-03-06

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Central Retinal Artery Occlusion, Ocular Surface Disease

Brief summary

Investigated the effects of high-frequency multi-band harmonic electromagnetic stimulation on ophthalmic and central retinal artery circulation.

Detailed description

This study investigated the effects of prolonged smartphone usage for over 90 minutes on ophthalmic and central retinal artery circulation before and after smartphone use and compared the effects with versus without intervention by high-frequency multi-band harmonic electromagnetic stimulation.

Interventions

DEVICEBOBY

high-frequency multi-band harmonic electromagnetic stimulation device

OTHERControl

placebo group

Study design

Allocation

RANDOMIZED

Intervention model

PARALLEL

Primary purpose

TREATMENT

Masking

DOUBLE (Subject, Investigator)

Intervention model description

This study is a randomized double-blind controlled trial. All participants who meet the inclusion criteria are randomly assigned to either the high-frequency multi-band harmonic electromagnetic stimulation device group as the experimental group or the placebo device group as the control group.

Eligibility

Sex/Gender

ALL

Age

20 Years to 65 Years

Healthy volunteers

Yes

Inclusion criteria

* 20 to 65 years old

Exclusion criteria

* hypertension * diabetes * heart disease * eye-related diseases

Design outcomes

Primary

Measure	Time frame	Description
Peak Systolic Velocity (PSV)	At the first visit and after 90 minutes usage of device.	peak systolic velocity (PSV) of the ophthalmic artery (OA) were measured using color Doppler ultrasound of the eye arterial blood flow (EPIQ Elite ultrasound system, PHILIPS).
End Diastolic Velocity (EDV)	At the first visit and after 90 minutes usage of device.	end diastolic velocity (EDV) of the ophthalmic artery (OA) were measured using color Doppler ultrasound of the eye arterial blood flow (EPIQ Elite ultrasound system, PHILIPS).
Central Retinal Artery (CRA)	At the first visit and after 90 minutes usage of device.	Central Retinal Artery (CRA) were measured using color Doppler ultrasound of the eye arterial blood flow (EPIQ Elite ultrasound system, PHILIPS).

Countries

Taiwan

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Feb 4, 2026