Trial Outcomes & Findings for Ocular Characteristics in Contact Lens and Spectacle Wear (NCT NCT03913377)

A total of 78 subjects were enrolled into this study. Of those enrolled, 65 subjects were assigned to either the observational arm (21) or the interventional arm (44), while 13 subjects failed to meet all eligibility criteria.

Of the 21 subjects assigned to the observational arm, all subjects completed the study. Of the 44 subjects assigned to the interventional arm 2 subjects were discontinued. A total of 63 subjects completed the study.

Ocular Characteristics in Contact Lens and Spectacle Wear

NIBUT/NIKBUT was measured as the time interval in seconds after the final blink to the first appearance of distortion in the reflected rings; or to the time that the participant has to blink due to discomfort. NIBUT is measured by a topographer (e.g. Medmont) via observation by the investigator and a stopwatch. NIKBUTis measured by the Oculus Keratograph and reported by the instrument. Different instrumentation was used depending on site availability. Combined measurements of pre-lens data collected for the interventional arm are reported. Only the interventional arm was reported since the primary analysis was conducted among habitual contact lens users. The average NIKBUT was reported for each treatment. Higher values indicate better performance

Meibomian gland expressiblity was assessed in three regions of the lower eyelid: temporal, central, and nasal. Each region is expressed and the overall grade of the region is evaluated using a four-grade scale: 0 = No Secretion, 1 = Inspissated, 2 = Colored/Cloudy Liquid, and 3 = Clear Liquid Oil. The total score was calculated as the sum of all grades across the three regions and ranged from 0 (no secretion) to 9, with higher scores indicating more MGE. Total scores were converted into a binary variable for the analysis purpose where Y=1 if the total score is greater than 6 and 0 otherwise. The percentage of participants with MGE total score greater than 6 was estimated. Only the interventional arm was reported since the secondary analysis was conducted among habitual contact lens users.

Conjunctival staining was graded and recorded by quadrant (Superior, Inferior, Nasal, and Temporal) using the following grading scale: Grade 0 = None, Grade 1 = Trace, Grade 2 = Mild, Grade 3 = Moderate, and Grade 4 = Severe. Average grade was calculated based on grades of the four quadrants. Only the interventional arm was reported since the secondary analysis was conducted among habitual contact lens users.

Horizontal lid margin staining and sagittal lid margin staining are graded for each eyelid (upper and lower) separately. The horizontal and sagittal grades are then averaged for each eyelid to obtain the upper lid average grade and lower lid average grade. The final grade is the average of the upper and lower lid average grades. Participants can be classified according to their final grades for each eye. The classification is defined as follows: "None" for final grades of 0, "Mild" for final grades between 0.25 and 1.00, "Moderate" for final grades between 1.25 and 2.00, and "Severe" for final graded between 2.25 and 3.00. Only the interventional arm was reported since the secondary analysis was planned to be conducted among habitual contact lens users only.

Meibomian gland expressiblity was assessed in three regions of the lower eyelid: temporal, central, and nasal. Each region is expressed and the overall grade of the region is evaluated using a four-grade scale: 0 = No Secretion, 1 = Inspissated, 2 = Colored/Cloudy Liquid, and 3 = Clear Liquid Oil. Only the interventional arm was reported since the secondary analysis was conducted among habitual contact lens users.