Perfluorohexyloctane Eye Drops vs. Sodium Hyaluronate for Video Display Terminal-Associated Dry Eye

June 29, 2026 updated by: Jinyuan,MD, Beijing Tongren Hospital

A Prospective, Multicenter, Randomized Controlled Trial on the Efficacy and Safety of Perfluorohexyloctane Eye Drops Versus 0.1% Sodium Hyaluronate Eye Drops in the Treatment of Video Display Terminal-associated Dry Eye

This is a prospective, multicenter, open-label, randomized controlled trial designed to evaluate the efficacy and safety of perfluorohexyloctane (PFHO) eye drops (Hengqin®, Chengdu Shengdi Pharmaceutical Co., Ltd.) compared with 0.1% sodium hyaluronate eye drops in patients with video display terminal (VDT)-associated dry eye.

Participants aged 18-70 years with mild to moderate dry eye (confirmed by Chinese Dry Eye Expert Consensus 2020 criteria) who use video display terminal for more than 6 hours/day and at least 5 days/week for more than 1 year will be enrolled. A total of 159 subjects will be randomized in a 2:1 ratio to the experimental group (PFHO eye drops, n=106) or control group (0.1% sodium hyaluronate eye drops, n=53), both administered 1 drop/eye, 4 times daily (3-5 hour intervals), bilaterally, for 8 weeks.

The primary endpoint is the change from baseline in fluorescein tear film break-up time (FBUT) at Week 8. Secondary endpoints include FBUT changes at Weeks 2 and 4, standard patient evaluation of eye dryness（SPEED） questionnaire score changes, total corneal fluorescein staining (tCFS), partial blink rate (PBR), non-invasive tear film break-up time (NIBUT), lipid layer thickness (LLT), meibomian gland secretion quality score, and This is a prospective, multicenter, open-label, randomized controlled trial designed to evaluate the efficacy and safety of perfluorohexyloctane (PFHO) eye drops (Hengqin®, Chengdu Shengdi Pharmaceutical Co., Ltd.) compared with 0.1% sodium hyaluronate eye drops (Hialid®) in patients with video display terminal (VDT)-associated dry eye.

Participants aged 18-70 years with mild to moderate dry eye (confirmed by Chinese Dry Eye Expert Consensus 2020 criteria) who use electronic screens for more than 6 hours/day and at least 5 days/week for more than 1 year will be enrolled. A total of 159 subjects will be randomized in a 2:1 ratio to the experimental group (PFHO eye drops, n=106) or control group (0.1% sodium hyaluronate eye drops, n=53), both administered 1 drop/eye, 4 times daily (3-5 hour intervals), bilaterally, for 8 weeks.

The primary endpoint is the change from baseline in fluorescein tear film break-up time (FBUT) at Week 8. Secondary endpoints include FBUT changes at Weeks 2 and 4, SPEED questionnaire score changes, total corneal fluorescein staining (tCFS), partial blink rate (PBR), non-invasive tear film break-up time (NIBUT), lipid layer thickness (LLT), meibomian gland secretion quality score, and meibography score at Weeks 2, 4, and 8.

Study Overview

Status

Not yet recruiting

Conditions

Intervention / Treatment

Study Type

Interventional

Enrollment (Estimated)

159

Phase

  • Phase 4

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Contact

Study Locations

  • China
      • Beijing, China
        • Chinese PLA General Hospital
        • Contact:
          • Liqiang Wang
      • Beijing, China
        • Peking Union Medical College Hospital
        • Contact:
          • Di Chen
      • Beijing, China
        • Beijing Aier-Intech Eye Hospital
      • Guangzhou, China
        • Guangdong Provincial People's Hospital
        • Contact:
          • Honghua Yu
      • Guangzhou, China
        • Sun Yat-Sen Memorial Hospital
        • Contact:
          • Yuqing Lan
      • Shanghai, China
        • Eye & ENT Hospital of Fudan University
        • Contact:
          • Lan Gong
      • Xi'an, China
        • Xi'an Fourth Hospital
        • Contact:
          • Ying Li
      • Zhongshan, China
        • Zhongshan City People's Hospital
        • Contact:
          • Naiyang Li
    • Beijing Municipality
      • Beijing, Beijing Municipality, China
        • Beijing Anzhen Hospital
        • Contact:
          • Xinxiao Gao

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Ages Eligible for Study

  • Adult
  • Older Adult

Accepts Healthy Volunteers

No

Description

Inclusion Criteria:

  1. Age 18-70 years (inclusive), male or female;
  2. Subject reports dry eye symptoms for at least 6 months;

  3. Diagnosis of mild to moderate dry eye according to the Chinese Dry Eye Expert Consensus (2020) criteria:

    • Mild dry eye: fluorescein tear film break-up time (FBUT) ≥2 seconds, no significant ocular surface damage signs, corneal fluorescein staining score <5;
    • Moderate dry eye: FBUT ≥2 seconds AND corneal fluorescein staining dots <30 or not exceeding 2 quadrants;
  4. Normal tear secretion: Schirmer I test ≥10 mm/5 min;
  5. Daily electronic screen usage >6 hours;
  6. Electronic screen use for at least 5 days/week, for more than 1 year;
  7. Understands and provides written informed consent.

Exclusion Criteria:

  1. Allergy or hypersensitivity to any component of the study drugs;
  2. Requires the use of artificial tears (other than study drug), secretagogues, ocular surface repair agents, anti-inflammatory/antibiotic eye drops, or other dry eye-related drugs (e.g., muscarinic receptor blockers for visual fatigue) during the study period;

  3. Presence of any of the following ocular or systemic conditions:

    • Active ocular infection, ocular inflammation, or active ocular allergy;
    • Conjunctivochalasis, nasolacrimal duct obstruction;
    • Glaucoma or elevated intraocular pressure;
    • Retinal disease or ocular tumor;
    • Requirement to wear contact lenses during the study;
    • Obstructive sleep apnea syndrome or sleep disorders;
    • Planned or ongoing physical therapy (intense pulsed light, meibomian gland massage, warm compress, thermopulsation) within 2 weeks before enrollment through the end of study;
  4. Ocular surgery within 3 months prior to enrollment, incomplete recovery from previous ocular surgery, or planned ophthalmic surgery during the study period;
  5. Current smoker;
  6. Pregnant or breastfeeding women, or women planning to become pregnant during the study period;
  7. Uncontrolled systemic disease, or use of systemic medications (e.g., beta-blockers, benzodiazepines, corticosteroids, antihistamines, or other medications that may interfere with tear production);
  8. History of anxiety or depression;
  9. Any other condition that, in the judgment of the investigator, would make the subject unsuitable for participation.

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Primary Purpose: Treatment
  • Allocation: Randomized
  • Interventional Model: Parallel Assignment
  • Masking: None (Open Label)

Arms and Interventions

Participant Group / Arm
Intervention / Treatment
Active Comparator: 0.1% Sodium Hyaluronate Eye Drops
1 drop per eye, 4 times daily (3-5 hour intervals between doses), applied bilaterally to the lower conjunctival sac, for 8 weeks.
Drug: 0.1% Sodium Hyaluronate Eye Drops
1 drop per eye, 4 times daily (3-5 hour intervals between doses), applied bilaterally to the lower conjunctival sac, for 8 weeks.
Other Names:
  • Hialid®，Santen Pharmaceutical(China) Co., Ltd
Experimental: Perfluorohexyloctane Eye Drops (PFHO)
1 drop per eye, 4 times daily (3-5 hour intervals between doses), applied bilaterally to the lower conjunctival sac, for 8 weeks.
Drug: Perfluorohexyloctane Eye Drops (PFHO)
1 drop per eye, 4 times daily (3-5 hour intervals between doses), applied bilaterally to the lower conjunctival sac, for 8 weeks.
Other Names:
  • Hengqin®, Chengdu Shengdi Pharmaceutical Co., Ltd.

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Fluorescein Tear Film Break-Up Time（FBUT）
Time Frame: week 8
Change from Baseline in Fluorescein Tear Film Break-Up Time (FBUT) at Week 8
week 8

Secondary Outcome Measures

Outcome Measure
Measure Description
Time Frame
standard patient evaluation of eye dryness（SPEED） Questionnaire
Time Frame: Weeks 2, 4, and 8
1.Change from Baseline in SPEED Questionnaire Score at Weeks 2, 4, and 8 2.Scores range from 0 to 28, with higher scores indicating more severe symptoms.
Weeks 2, 4, and 8
Total Corneal Fluorescein Staining Score (tCFS)
Time Frame: Weeks 2, 4, and 8
1.Change from Baseline in Total Corneal Fluorescein Staining Score (tCFS) at Weeks 2, 4, and 8；2.The cornea was divided into five regions: superior, central, inferior, nasal, and temporal. Each region was scored from 0 to 3, yielding a total score ranging from 0 to 15, with higher scores indicating more severe signs.
Weeks 2, 4, and 8
Partial Blink Rate (PBR)
Time Frame: Weeks 2, 4, and 8
Change from Baseline in Partial Blink Rate (PBR) at Weeks 2, 4, and 8
Weeks 2, 4, and 8
Non-Invasive Tear Film Break-Up Time (NIBUT)
Time Frame: Weeks 2, 4, and 8
Change from Baseline in Non-Invasive Tear Film Break-Up Time (NIBUT) at Weeks 2, 4, and 8
Weeks 2, 4, and 8
Meibomian Gland Secretion Quality Score
Time Frame: Weeks 2, 4, and 8
1.Change from Baseline in Meibomian Gland Secretion Quality Score at Weeks 2, 4, and 8；2.The central lower eyelid margin was gently pressed with a cotton swab to evaluate five meibomian glands. The secretion quality of each gland was graded on a scale of 0 to 3. The total score ranged from 0 to 15, with higher scores indicating poorer meibum quality.
Weeks 2, 4, and 8

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Beijing Tongren Hospital

Investigators

  • Principal Investigator: Jin Yuan, Beijing Tongren Hospital

Publications and helpful links

The person responsible for entering information about the study voluntarily provides these publications. These may be about anything related to the study.

General Publications

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start (Estimated)

June 30, 2026

Primary Completion (Estimated)

February 28, 2027

Study Completion (Estimated)

April 30, 2027

Study Registration Dates

First Submitted

June 24, 2026

First Submitted That Met QC Criteria

June 29, 2026

First Posted (Actual)

July 1, 2026

Study Record Updates

Last Update Posted (Actual)

July 1, 2026

Last Update Submitted That Met QC Criteria

June 29, 2026

Last Verified

June 1, 2026

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

  • IIT-VDT-PFHO-2026

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

NO

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

No

Studies a U.S. FDA-regulated device product

No

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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