Smart Touch Non-dispensing Handling Studies

Optometry Clinical Trial

Official title: Microbial Contamination Rates on the Back Surface of Soft Contact Lenses in Two Short-term, Randomized, Contralateral Non-dispensing Studies

Status Completed

Clinical Trial Summary

This study is a randomized, contralateral, investigator-masked non-dispensing study, to investigate the microbial contamination rates on the back surface of two types of soft contact lenses (hydrogel and silicone hydrogel) extracted from Smart Touch Technology blister packs versus conventional lens packaging after short-term placement on the eye, and to compare the microbial contamination rates of the worn contact lenses to those on the participants' hands/fingers used to conduct lens insertion.

Clinical Trial Description

This will be a prospective, single centre, randomized, contralateral, investigator-masked non-dispensing study. This study requires three visits of approx. 1 hour duration each. At the first visit, the order in which the hydrogel (no EDTA) and silicone hydrogel (with EDTA) contact lenses are allocated to the study participants will be randomized. At the second visit, participants will be crossed over to the alternate lens type (hydrogel no EDTA or silicone hydrogel with EDTA). At the third visit, participants will be randomly allocated to wear the hydrogel lens (with EDTA) in one eye and the silicone hydrogel lens (no EDTA) in the other eye, both removed from Smart Touch Technology packaging. At each visit, participants will be instructed to: - Wash their hands prior to handling the contact lenses; - Swab their thumb and two index fingers of the hand routinely used to conduct contact lens insertion using a sterile cotton swab moistened with sterile preservative free saline for the evaluation of skin microbiota; - Follow the manufacturer's guidelines for lens insertion; - Open the blister pack and insert the contact lens randomly assigned for the right eye; - Open the blister pack and insert the contact lens assigned for the left eye; - Contact lenses will be removed aseptically by a masked investigator after 45 minutes of lens wear. Lenses and finger swabs will be analysed for microbial contamination using established routine microbiology protocols. The number and species of organisms will be determined. A minimum washout period of 48 hours will occur between the study visits. ;

Related Conditions & MeSH terms

• Optometry

• NCT number: NCT03253393
• Study type: Interventional
• Source: The University of New South Wales
• Status: Completed
• Phase: N/A
• Start date: June 4, 2018
• Completion date: February 27, 2019