Lens Wear Schedules and End-of-Day Comfort - Full Text View

Purpose

The purpose of this study was to assess the impact of lens-free (recovery) intervals of varying lengths on end-of-day comfort and tear film changes with daily contact lens wear.

Condition	Intervention
Myopia	Device: Lotrafilcon B Device: Senofilcon A

Study Type:	Interventional
Study Design:	Allocation: Randomized Intervention Model: Crossover Assignment Masking: Single Blind (Subject) Primary Purpose: Supportive Care
Official Title:	Effect of Recovery Periods on Ocular Comfort During Daily Lens Wear

Resource links provided by NLM:

MedlinePlus related topics: Eye Wear

U.S. FDA Resources

Further study details as provided by Alcon Research:

Primary Outcome Measures:

Mean End-of-Day Comfort [ Time Frame: Hour 12 ] [ Designated as safety issue: No ]
As assessed by the participant using a visual analog scale ranging from 0 (extremely uncomfortable) to 100 (very comfortable and fresh) at the end of each 12-hour (approximate) cycle. During each cycle, contact lenses were worn for 2-hour intervals, separated by lens-free (recovery) intervals of either 0, 30, 60, or 80 minutes. A new pair of contact lenses was dispensed for each 2-hour interval of lens wear.

Secondary Outcome Measures:

Mean Non-Invasive Tear Film Break-Up Time (NITBUT) [ Time Frame: Hour 12 ] [ Designated as safety issue: No ]
As assessed by the investigator using a corneal topographer. NITBUT was assessed at the end of each 12-hour (approximate) cycle. During each cycle, contact lenses were worn for 2-hour intervals, separated by lens-free (recovery) intervals of either 0, 30, 60, or 80 minutes. A new pair of contact lenses was dispensed for each 2-hour interval of lens wear. A longer tear film break-up time indicates a more stable tear film and may lead to a more comfortable lens-wearing experience.

Enrollment:	44
Study Start Date:	August 2011
Study Completion Date:	March 2012
Primary Completion Date:	March 2012 (Final data collection date for primary outcome measure)

Arms	Assigned Interventions
Lotrafilcon B / Senofilcon A Lotrafilcon B worn first, with senofilcon A worn second, as randomized. Each product was worn bilaterally in 2-hour intervals, separated by lens-free (recovery) intervals of either 0, 30, 60, or 80 minutes, over the course of a 12-hour day, for a total of 4 cycles (days).	Device: Lotrafilcon B Commercially marketed, silicone hydrogel, single-vision contact lens FDA-approved for daily wear and extended (overnight) wear up to 6 nights. Other Name: AIR OPTIX® AQUA Device: Senofilcon A Commercially marketed, silicone hydrogel, single-vision contact lens FDA-approved for daily wear and extended (overnight) wear up to 6 nights. Other Name: ACUVUE® OASYS®
Senofilcon A / Lotrafilcon B Senofilcon A worn first, with lotrafilcon B worn second, as randomized. Each product was worn bilaterally in 2-hour intervals, separated by lens-free (recovery) intervals of either 0, 30, 60, or 80 minutes, over the course of a 12-hour day, for a total of 4 cycles (days).	Device: Lotrafilcon B Commercially marketed, silicone hydrogel, single-vision contact lens FDA-approved for daily wear and extended (overnight) wear up to 6 nights. Other Name: AIR OPTIX® AQUA Device: Senofilcon A Commercially marketed, silicone hydrogel, single-vision contact lens FDA-approved for daily wear and extended (overnight) wear up to 6 nights. Other Name: ACUVUE® OASYS®

Detailed Description:

This study was conducted in a cross-over design with two phases. Each phase consisted of four cycles approximately 12 hours in length. During each cycle, contact lenses were worn for 2-hour intervals, separated by lens-free (recovery) intervals of either 0, 30, 60, or 80 minutes. A new pair of contact lenses was dispensed for each 2-hour interval of lens wear. A 12-hour lens-free wear period preceded each phase.

Eligibility

Ages Eligible for Study:	17 Years and older
Genders Eligible for Study:	Both
Accepts Healthy Volunteers:	No

Criteria

Inclusion Criteria:

Is at least 17 years of age and has full legal capacity to volunteer.
Is willing and able to follow instructions and maintain the appointment schedule.
Has had an ocular examination in the last two years.
Is an adapted soft contact lens wearer.
Experiences a decrease in ocular comfort through a lens-wearing day.
Has a current pair of spectacles.
Has a distance contact lens prescription of +6.00 diopters to -10.00 diopters and an acceptable fit with the study lenses.
Has astigmatism less than or equal to -1.00 DC.
Achieves visual acuity of 6/9 or better with the study lenses and with habitual spectacles.
Other protocol-defined inclusion criteria may apply.

Exclusion Criteria:

Has any ocular disease.
Has a systemic condition that may affect a study outcome variable.
Is using any systemic or topical medications that may affect ocular health.
Has known sensitivity to the diagnostic pharmaceuticals to be used in the study.
Other protocol-defined exclusion criteria may apply.

Contacts and Locations

Please refer to this study by its ClinicalTrials.gov identifier: NCT01433549

Locations

Canada, Ontario
University of Waterloo Centre for Contact Lens Research
Waterloo, Ontario, Canada, N2L 3G1

Sponsors and Collaborators

CIBA VISION

University of Waterloo

Investigators

Principal Investigator:

Lyndon Jones, PhD FCOptom FAAO, Director

Centre for Contact Lens Research, School of Optometry, University of Waterloo

More Information

No publications provided

Responsible Party:	Alcon Research ( CIBA VISION )
ClinicalTrials.gov Identifier:	NCT01433549 History of Changes
Other Study ID Numbers:	P-373-C-104
Study First Received:	September 12, 2011
Results First Received:	March 20, 2013
Last Updated:	April 30, 2013
Health Authority:	Canada: Ethics Review Committee

Additional relevant MeSH terms:

Myopia
Refractive Errors
Eye Diseases

ClinicalTrials.gov processed this record on May 22, 2013

Lens Wear Schedules and End-of-Day Comfort (INVERMERE)