Diurnal Variation in Tear Osmolarity

Study Results

Results pending

The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.

Basic Information

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Recruitment Status

COMPLETED

Total Enrollment

60 participants

Study Classification

OBSERVATIONAL

Study Start Date

2011-03-31

Study Completion Date

2016-03-31

Brief Summary

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The purpose of this study is to measure the change in Tear Osmolarity during the course of the day to support clinical diagnosis of aqueous deficiency or meibomian gland disease and differentiate between the two forms of dry eye.

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Detailed Description

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The premise of this study is that dry eye disease, specifically tear osmolarity, changes during the course of the day based on the etiology of the dry eye and that aqueous-deficiency dry eye will worsen during the course of the day while meibomian gland deficiency will stabilize or possibly even improve during the course of the day.

Conditions

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Dry Eye Disease

Study Design

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Observational Model Type

CASE_CONTROL

Study Time Perspective

CROSS_SECTIONAL

Study Groups

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Aqueous Dificiency Dry Eye

20 Participants

No interventions assigned to this group

Meibomian Gland Disease Dry Eye

20 Participants

No interventions assigned to this group

Normal Eye

20 Participants

No interventions assigned to this group

Eligibility Criteria

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Inclusion Criteria

1. Healthy males and females ≥ 18 years old
2. Negative urine pregnancy results for females of childbearing potential
3. Able to read and sign an informed consent form and show willingness to comply with the study protocol visits and procedures
4. Has 20/40 BCVA or better in at least one eye
5. Does not currently wear contact lenses
6. For Aqueous-Deficiency Group:

* Has symptoms of Dry Eye
* Schirmer testing ≤ 10 mm
* Tear Break Up Time ≤ 8 seconds
* Conjunctival staining ≥ 1+
* Meibomian gland inspissations ≤ 1+
* No lid thickening, lid erythema, or thickened, turbid meibomian gland secretions
7. For Meibomian Gland Disease Group:

* Has symptoms of Dry Eye
* Schirmer testing ≥ 10 mm
* Tear Break Up Time ≤ 8 seconds
* Conjunctival staining ≥ 1+
* Meibomian gland inspissations ≥ 2+
8. For Normal Group:

* Has no symptoms of Dry Eye
* Schirmer testing \> 10 mm
* Tear Break Up Time \> 8 seconds
* No or trace Conjunctival staining
* No Meibomian gland inspissations

Exclusion Criteria

1. Any topical medication within the last three months, except for artificial tears
2. Unable to discontinue use of artificial tears during the course of the day for Visit 2
3. Any Systemic disease, which in the opinion of the Investigator, may affect ocular health or confound study results
4. Any active ocular disease other than Dry Eye Disease, Meibomian Gland Disease or Sjogren's Syndrome, which in the opinion of the Investigator, may affect ocular health or confound study results
5. Clinically significant lid or conjunctival abnormalities, neovascularization, corneal scars or corneal opacities
6. Clinically significant limbal or bulbar injection, or corneal staining not due to DES
7. Has worn hard or rigid gas permeable contact lenses within 1 year
8. Has worn soft contact lenses within 1 week
9. Has had eye surgery or an eye injury within 6 months
10. Positive urine pregnancy results for females of childbearing potential
11. Any changes in current medication within 30 days of Visit 2 or anticipated change during course of study, which in the opinion of the Investigator may confound study results

Minimum Eligible Age

18 Years

Eligible Sex

ALL

Accepts Healthy Volunteers

Yes