Evaluation of the Effect of Repeated Usage on the Tear Film Characteristics of an Investigational Eye Drop in Dry Eye Sufferers
- Conditions
- Dry Eye Syndrome
- Interventions
- Device: Carboxymethylcellulose sodium, glycerin and polysorbate 80
- Registration Number
- NCT01339936
- Lead Sponsor
- Optometric Technology Group Ltd
- Brief Summary
The main objectives of the investigation will be to assess the effect of the repeated usage of an investigational eye drop on the tear film characteristics of dry eye sufferers and demonstrate the benefit of this eye drops for dry eye sufferers.
- Detailed Description
Not available
Recruitment & Eligibility
- Status
- COMPLETED
- Sex
- All
- Target Recruitment
- 40
- Mild or greater dry eye symptoms.
- Evidence of evaporative dry eye
- Known allergy or sensitivity to the study product(s) or its components
- Current contact lens wearer
- Systemic or ocular allergies
- Use of systemic medication which might have ocular side effects.
- Any ocular infection.
- Use of ocular medication.
Study & Design
- Study Type
- INTERVENTIONAL
- Study Design
- SINGLE_GROUP
- Arm && Interventions
Group Intervention Description Investigational eye drop Carboxymethylcellulose sodium, glycerin and polysorbate 80 Formulation 1: Carboxymethylcellulose sodium, glycerin and polysorbate 80 based eye drops formulated for the relief of ocular surface irritation and symptoms of dryness
- Primary Outcome Measures
Name Time Method Tear Film Evaporation Rate after 30 days of eyedrop usage The rate of evaporation of the tears from the ocular surface was measured. To do so the participant was required to wear a sealed goggle over the eye, which served to isolate the air surrounding the ocular surface. The temperature and humidity were measured within the sealed goggle during closed eye and open eye situations. The evaporation from the ocular surface was calculated by taking the difference between the evaporation rate of the skin taken during the closed eye measurement and the evaporation rate taken during the open eye measurement. The rate of evaporation was measured in 10\^-7 g/cm\^2 /s and recorded for relative humidity of 25% to 35%.
- Secondary Outcome Measures
Name Time Method Tear Break Up Time after 30 days of eyedrop usage The tear film break-up-time (BUT) is the time elapsed between eye opening after a blink, and the appearance of the first dark spot within the tear film when observed with a wide diffuse light source of the Tearscope. This measurement is indicative of the tear film stability. Three independent measurements were recorded in each case and the median value over the three measurements calculated. The latter value constituted the secondary endpoint used in the analysis.
Ocular Surface Disease Index Score after 30 days of eye drop usage The OSDI is a 12-item patient-reported outcomes questionnaire designed to assess the range of ocular surface symptoms, their severity, and their impact on the patient's ability to function.
The OSDI items are scored on a 0 to 4 Likert-type scale, where 0 = None of the time, 1 = Some of the time, 2 = Half of the time, 3 = Most of the time, and 4 = All of the time. Using individual item responses, an overall OSDI score is calculated. The overall OSDI score ranges from 0 to 100, where a score of 100 corresponds to complete disability while a score of 0 corresponds to no disability.
Trial Locations
- Locations (1)
OTG Research & Consultancy
🇬🇧London, England, United Kingdom