Implementation of a 3D Printed Custom Mask Fitter in an Ophthalmology Setting during the COVID-19 Pandemic

Abstract Objective To assess the effectiveness of a 3D printed custom mask fitter in lieu of N95 respirators among ophthalmologists and other eye care professionals (ECPs) who may not be prioritized to receive N95 respirators amidst the COVID-19 pandemic. Methods This was a proof-of-concept study from a tertiary eye care center in Oakville, Canada. All participants underwent the N95 Qualitative Fit Test with a custom mask fitter secured over an ASTM Level 3 facemask. Participants answered a 1 to 10 Likert scale questionnaire on comfort, ease of use, and feasibility of the custom mask fitter, as well as comfort of a regular facemask. Results A total of 20 participants were recruited of whom 90% (18/20) successfully passed the Fit Test. The median scores for comfort, ease of use, and everyday feasibility for the custom mask fitter were 3.5, 4.5, and 3.0, respectively, while the median score for comfort of a regular facemask was 8.5. Conclusion A reusable, low-cost, 3D printed custom mask fitter is a potential effective alternative to an N95 respirator amongst ECPs but may require improvement in its design and comfort. This is especially relevant in the context of a limited supply of N95 respirators amidst a global pandemic.