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The Impact of Hypo-osmolar Drops on Contact Lens Comfort (SAFFRON)

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ClinicalTrials.gov Identifier: NCT03050125
Recruitment Status : Completed
First Posted : February 10, 2017
Last Update Posted : May 4, 2017
Sponsor:
Collaborator:
Coopervision, Inc.
Information provided by (Responsible Party):
Centre for Contact Lens Research, University of Waterloo

Brief Summary:
This pilot study will investigate the impact of sterile saline drops that are formulated at hypo-osmolar levels on CL comfort in comparison to an iso-osmolar drop, in a group of symptomatic CL wearers.

Condition or disease Intervention/treatment Phase
Contact Lens Related Dry Eye Device: Hypo-osmolar drop 1 Device: Hypo-osmolar drop 2 Device: Iso-osmolar drop Not Applicable

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Study Type : Interventional  (Clinical Trial)
Actual Enrollment : 20 participants
Allocation: Randomized
Intervention Model: Crossover Assignment
Masking: Double (Participant, Investigator)
Primary Purpose: Treatment
Official Title: The Impact of Hypo-osmolar Drops on Contact Lens Comfort
Actual Study Start Date : February 7, 2017
Actual Primary Completion Date : March 28, 2017
Actual Study Completion Date : March 28, 2017

Resource links provided by the National Library of Medicine

MedlinePlus related topics: Eye Wear

Arm Intervention/treatment
Experimental: Hypo-osmolar drop 1
Subject will receive regular instillations of hypo-osmolar sterile saline drops with the lowest osmolarity of the two hypo-osmolar drops.
Device: Hypo-osmolar drop 1
180 mOsmol sterile saline drops used as a contact lens rewetting drop.

Experimental: Hypo-osmolar drop 2
Subject will receive regular instillations of hypo-osmolar sterile saline drops with the highest osmolarity of the two hypo-osmolar drops.
Device: Hypo-osmolar drop 2
240 mOsmol sterile saline drops used as a contact lens rewetting drop.

Experimental: Iso-osmolar drop
Subject will receive regular instillations of sterile iso-osmolar saline drops.
Device: Iso-osmolar drop
300 mOsmol sterile saline drops used as a contact lens rewetting drop.




Primary Outcome Measures :
  1. Participant's Subjective Rating of Comfort (Questionnaire) [ Time Frame: Baseline, 1.5hrs, 3hrs, 4.5hrs, 6hrs, 7.5hrs, 9hrs, End of 1 day ]
    Participants rated their eye comfort by subjective questionnaire (un-annotated scale, 0-100, 0=Very poor comfort, 100=Excellent comfort). Change over time measured at baseline, 1.5 hrs, 3 hrs, 4.5 hrs, 6 hrs, 7.5 hrs, 9 hrs and End of day.

  2. Participant's Subjective Rating of Dryness (Questionnaire) [ Time Frame: Baseline, 1.5hrs, 3hrs, 4.5hrs, 6hrs, 7.5hrs, 9hrs, End of 1 day ]
    Participants rated the dryness of their eyes by subjective questionnaire (un-annotated scale, 0-100, 0=Very dry, 100=No dryness at all). Change over time measured at baseline, 1.5 hrs, 3 hrs, 4.5 hrs, 6 hrs, 7.5 hrs, 9 hrs and End of day.

  3. Participant's Subjective Rating of Foreign Body Sensation (Questionnaire) [ Time Frame: Baseline, 1.5hrs, 3hrs, 4.5hrs, 6hrs, 7.5hrs, 9hrs, End of 1 day ]
    Participants rated the foreign body sensation of their eyes by subjective questionnaire (un-annotated scale, 0-100, 0=Intense feeling of foreign body sensation, 100=No foreign body sensation at all). Change over time measured at baseline, 1.5 hrs, 3 hrs, 4.5 hrs, 6 hrs, 7.5 hrs, 9 hrs and End of day.

  4. Participant's Subjective Rating of Stability of Vision (Questionnaire) [ Time Frame: Baseline, 1.5hrs, 3hrs, 4.5hrs, 6hrs, 7.5hrs, 9hrs, End of 1 day ]
    Participants rated the stability of their vision by subjective questionnaire (un-annotated scale, 0-100, 0=Not stable at all/ very fluctuating, 100=Very stable). Change over time measured at baseline, 1.5 hrs, 3 hrs, 4.5 hrs, 6 hrs, 7.5 hrs, 9 hrs and End of day.

  5. Participant's Subjective Rating of Comfort (Questionnaire) - Likert scale [ Time Frame: Baseline, 1.5 hrs, 3 hrs, 4.5 hrs, 6 hrs, 7.5 hrs, 9 hrs and End of 1 day. ]
    Participants responded to the statement "My eyes feels comfortable" (5 possible ratings, Strongly agree, agree, undecided, disagree, strongly disagree). Change over time measured at baseline, 1.5 hrs, 3 hrs, 4.5 hrs, 6 hrs, 7.5 hrs, 9 hrs and End of day.

  6. Participant's Subjective Rating of Dryness (Questionnaire) - Likert scale [ Time Frame: Baseline, 1.5 hrs, 3 hrs, 4.5 hrs, 6 hrs, 7.5 hrs, 9 hrs and End of 1 day. ]
    Participants responded to the statement "My eyes feel dry" (5 possible ratings, Strongly agree, agree, undecided, disagree, strongly disagree). Change over time measured at baseline, 1.5 hrs, 3 hrs, 4.5 hrs, 6 hrs, 7.5 hrs, 9 hrs and End of day.

  7. Participant's Subjective Rating of Burning (Questionnaire) - Likert scale [ Time Frame: Baseline, 1.5 hrs, 3 hrs, 4.5 hrs, 6 hrs, 7.5 hrs, 9 hrs and End of 1 day. ]
    Participants responded to the statement "My eyes burn" (5 possible ratings, Strongly agree, agree, undecided, disagree, strongly disagree). Change over time measured at baseline, 1.5 hrs, 3 hrs, 4.5 hrs, 6 hrs, 7.5 hrs, 9 hrs and End of day.

  8. Participant's Subjective Rating of Awareness (Questionnaire) - Likert scale [ Time Frame: Baseline, 1.5 hrs, 3 hrs, 4.5 hrs, 6 hrs, 7.5 hrs, 9 hrs and End of 1 day. ]
    Participants responded to the statement "I am aware of the lenses in my eyes" (5 possible ratings, Strongly agree, agree, undecided, disagree, strongly disagree). Change over time measured at baseline, 1.5 hrs, 3 hrs, 4.5 hrs, 6 hrs, 7.5 hrs, 9 hrs and End of day.

  9. Participant's Subjective Rating of vision stability (Questionnaire) - Likert scale [ Time Frame: Baseline, 1.5 hrs, 3 hrs, 4.5 hrs, 6 hrs, 7.5 hrs, 9 hrs and End of 1 day. ]
    Participants responded to the statement "My vision is stable" (5 possible ratings, Strongly agree, agree, undecided, disagree, strongly disagree). Change over time measured at baseline, 1.5 hrs, 3 hrs, 4.5 hrs, 6 hrs, 7.5 hrs, 9 hrs and End of day.

  10. Drop preference (compared with last drop used) [ Time Frame: End of day 2, End of day 3 ]
    Participant's subjective response for drop preference (compared with last drop used) at the end of days 2 and 3. (5 possible ratings: Strongly prefer Day 1, Prefer Day 1, No preference, Prefer Day 2, Strongly prefer day 2 OR Strongly Prefer Day 2, Prefer Day 2, No preference, Prefer Day 3, Strongly prefer day 3)


Secondary Outcome Measures :
  1. Tear film osmolarity [ Time Frame: Baseline, End of 1 day ]
    Tear film osmolarity in mOsmol/L, measured prior to the first drop of the day and at the end of the day.

  2. Tear meniscus height [ Time Frame: Baseline, End of 1 day ]
    Tear meniscus height in mm, measured prior to the first drop of the day and at the end of the day.

  3. Non-invasive tear film break-up time (NITBUT) [ Time Frame: Baseline, End of 1 day ]
    Measurement of time taken in seconds for a dry spot to appear on the corneal surface after blinking.

  4. Conjunctival hyperemia [ Time Frame: Baseline, 4.5 hrs, End of 1 Day ]
    Conjunctival hyperemia evaluated on a scale from 0 (negligible) to 100 (severe).

  5. Limbal hyperemia [ Time Frame: Baseline, 4.5 hrs, End of 1 Day ]
    Limbal hyperemia evaluated on a scale from 0 (normal) to 4 (severe).

  6. Average corneal staining [ Time Frame: Baseline, 4.5 hrs, End of 1 Day ]
    Average corneal staining evaluated on a scale from 0 (normal) to 4 (severe).

  7. Lens movement [ Time Frame: Baseline, 4.5 hrs, End of 1 Day ]
    Amount of lens movement on blink (mm).

  8. Lens lag [ Time Frame: Baseline, 4.5 hrs, End of 1 Day ]
    Amount of lens lag on blink (mm).

  9. Lens Tightness [ Time Frame: Baseline, 4.5 hrs, End of 1 Day ]
    Amount of lens tightness (%).



Information from the National Library of Medicine

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Ages Eligible for Study:   17 Years and older   (Child, Adult, Older Adult)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   Yes
Criteria

Inclusion Criteria:

  • Is at least 17 years of age;
  • Has full legal capacity to volunteer;
  • Has read and signed an information consent letter;
  • Is willing and able to follow instructions and maintain the appointment schedule;
  • Is willing and able to stay within the School of Optometry and Vision Science building for the duration of each Study Day;
  • Currently wears daily, soft, frequent replacement lenses licensed in Canada (daily, bi-weekly or monthly disposable lenses, no extended wear, no monovision) for at least 3 days/week and 6 hours/day during the 2 months prior to enrolment;
  • Is symptomatic according to the following classification:

    • Reports a difference between average and comfortable wear time with habitual lenses of at least 3 hours;
    • Fall into the symptomatic group as per Young's criteria (Appendix 4).
  • Is able to remove and insert the lenses by themselves;
  • Owns a wearable pair of spectacles;
  • Is willing to wear the study lenses for 10 hours;
  • Has visual acuity (VA) correctable to logMAR 0.20 or better in each eye;
  • Shows an acceptable lens fit with their habitual lenses;

Exclusion Criteria:

  • Is participating in any concurrent clinical or research study;
  • Has any known active* ocular disease and/ or infection;
  • Has any ocular abnormality that would contraindicate contact lens wear;
  • Has any known infection or inflammation that requires treatment or has a systemic condition that in the opinion of the investigator may affect the study measures;
  • Is using any systemic or topical medications that in the option of the investigator may affect the study measures;
  • Has any known sensitivity to the diagnostic pharmaceuticals and products to be used in this study;
  • Is pregnant or lactating (by verbal communication) due to potential ocular physiology changes that may affect the study outcome;
  • Is aphakic;
  • Has undergone refractive error surgery;
  • Is a member of the CCLR directly involved in the data collection. *For the purpose of this study, active ocular disease is defined as an infection or inflammation that requires therapeutic treatment. Mild (i.e. not considered clinically relevant) lid abnormalities (blepharitis, meibomian gland dysfunction, papillae), corneal and conjunctival staining and dry eye are not considered an active ocular disease. Neovascularization and corneal scars are the result of previous hypoxia, infection or inflammation and are therefore not active.

Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT03050125


Locations
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Canada, Ontario
Centre for Contact Lens Research
Waterloo, Ontario, Canada, N2L 3G1
Sponsors and Collaborators
Centre for Contact Lens Research
Coopervision, Inc.

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Responsible Party: Centre for Contact Lens Research, Director, Centre for Contact Lens Research, University of Waterloo
ClinicalTrials.gov Identifier: NCT03050125     History of Changes
Other Study ID Numbers: 21907
First Posted: February 10, 2017    Key Record Dates
Last Update Posted: May 4, 2017
Last Verified: May 2017
Individual Participant Data (IPD) Sharing Statement:
Plan to Share IPD: No

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Studies a U.S. FDA-regulated Drug Product: No
Studies a U.S. FDA-regulated Device Product: No
Product Manufactured in and Exported from the U.S.: No