The purpose of this study is to evaluate the functional vision of 2 daily disposable silicone hydrogel contact lenses using Time Controlled Visual Acuity (TCVA) measurements at high luminance and high contrast after 10+/-3 days of wear post 3 hour exposure to a reduced humidity environment.
After randomization, participants attended a baseline visit to include a 3 hour exposure to reduced humidity environment. The participant's habitual lenses were worn for the baseline visit.
Study Type
INTERVENTIONAL
Allocation
RANDOMIZED
Purpose
TREATMENT
Masking
SINGLE
Enrollment
66
Contact lenses worn during Period 1 or 2, as randomized
Contact lenses worn during Period 1 or 2, as randomized
High Contrast Time-Controlled Visual Acuity (TCVA) (VA Unit) Post-Exposure to Reduced Humidity at Day 10
High contrast TCVA was assessed after 3 hours exposure to reduced humidity environment. TCVA test was performed at 4 meters under high illumination (90%) using a Landolt ring test. For each acuity level, a series of single rings with gaps in one of four directions was presented and the percentage of correctly identified rings constituted the score. TCVA was measured in VA units and a higher TCVA value indicates an improvement in visual acuity. Both eyes contributed to the analysis.
Time frame: Day 10, each product
High Contrast TCVA (VA Unit) Pre-Exposure to Reduced Humidity at Day 10
High contrast TCVA was assessed after 3 hours exposure to normal environment and prior to exposure to reduced humidity environment. Both eyes contributed to the analysis.
Time frame: Day 10, each product
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