Changes of Visual Function, Ocular Surface Structures and Physiology After Long-Termed Contact Lens Wear

September 8, 2016 updated by: Hsiao Sang Chu, MD, National Taiwan University Hospital
Our study is aimed to observe the long termed effect of contact lens wear on ocular surface, especially focused on visual function and ocular inflammation mediators.

Study Overview

Status

Unknown

Conditions

Intervention / Treatment

Detailed Description

Contact lens fitting are important treatments for many ocular diseases as they provide three main therapeutic applications: visual correction, protection of ocular surface, and cosmetic or sport purposes. The ophthalmology department of NTUH has set up contact lens special clinic as one of our comprehensive refractive services. The investigators provided corneal lenses or Rose K lenses for optical correction of keratoconus patients; the investigators also fitted large scleral lenses for the correction of irregular astigmatism for post-penetrating keratoplasty and post-refractive surgery patients. In addition, contact lenses can be an adjuvant therapy for ocular surface disorders as severe dry eye and limbal insufficiency. There were researches that proved the inflammatory mediators and neutrophils increased after long-termed wear of silicon hydrogel soft lenses or over night orthokeratology lenses. They also concluded that lens wear affected corneal epithelial proliferation. However, the physiological changes after long-termed wear of large diameter scleral lenses are still pending. In addition, we still do not understand the lens effects on high order aberration and ocular surface structures. The purpose of our study is to analyze the epidemiologic data and treatment results of the patients fitted with specialty lenses in our contact lens clinic from Aug 2016 to Aug 2018. Patients will be categorized into different groups by the diagnoses and the type of lens wear. After 6 months of follow up, the change of visual acuity, visual function related quality of life, the changes of ocular surface structures and physiology will be analyzed. The investigators hope to share the experiences of specialty contact lens fitting and understand the effects of long-term contact lens wear on ocular surface.

Study Type

Interventional

Enrollment (Anticipated)

40

Phase

  • Not Applicable

Contacts and Locations

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

Study Locations

  • Taiwan
      • Taipei, Taiwan, 10002
        • Recruiting
        • Hsiao Sang Chu
        • Contact:

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

20 years to 65 years (Adult, Older Adult)

Accepts Healthy Volunteers

Yes

Genders Eligible for Study

All

Description

Inclusion Criteria:

  • age 20 to 65
  • contact lens wear
  • willing to be followed for at least 6 months

Exclusion Criteria:

  • active ocular infection
  • active corneal melting
  • inability to follow lens cleaning instructions
  • pregnancy

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: Non-Randomized
  • Interventional Model: Parallel Assignment
  • Masking: None (Open Label)

Arms and Interventions

Participant Group / Arm
Intervention / Treatment
Experimental: corneal lenses
patients that wear corneal lenses ( Hiclear Rigid Gas Permeable Lenses)
Device: corneal lenses
wear corneal lenses on daily basis
Experimental: large diameter lenses
patients that wear scleral lenses (Paragon Normaleyes)
Device: large diameter lenses

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Ocular inflammatory mediators
Time Frame: 6 months
to monitor the change of tear inflammatory mediators 6 months after lens wear
6 months

Collaborators and Investigators

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

Sponsor

National Taiwan University Hospital

Investigators

  • Principal Investigator: Hsiao Sang Chu, MD, MS, Department of Ophthalmology, NTUH

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

August 1, 2016

Primary Completion (Anticipated)

August 1, 2019

Study Completion (Anticipated)

August 1, 2019

Study Registration Dates

First Submitted

August 30, 2016

First Submitted That Met QC Criteria

September 8, 2016

First Posted (Estimate)

September 9, 2016

Study Record Updates

Last Update Posted (Estimate)

September 9, 2016

Last Update Submitted That Met QC Criteria

September 8, 2016

Last Verified

September 1, 2016

More Information

Terms related to this study

Additional Relevant MeSH Terms

Other Study ID Numbers

  • 201508075RINC

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

YES

IPD Plan Description

for publication

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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