Lens attachment guard (LAG): a novel protection system for lenses used in ophthalmology.

Abstract

To create and clinically test the Lens Attachment Guard (LAG), a 3D-printed protective attachment for the prevention of incidental falls and breakage of ophthalmic lenses employed in laser treatments like pan-retinal photocoagulation (PRP). The LAG system was designed after several cases of lens damage in a busy clinical practice. It was created with Computer-Aided Design software and produced with thermoplastic polyurethane (TPU) through 3D printing. Iterative prototyping was done to maximise fit, optical compatibility and user-friendliness. The last prototype consisted of three primary elements: a winding clip, thread lock and 3D-printed lens holder. The LAG system ensured safe lens stabilisation without compromising laser delivery or visualisation. TPU had shock-absorption and was sterilisation compatible. There were no drops of lenses reported when used. Clinician input revealed enhanced procedural confidence and minimal interference with workflow. The system proved versatile for varied lens types and was readily cleaned and could be reused from case to case. The LAG is a user-friendly, reusable and inexpensive innovation that satisfies a previously unmet need in ophthalmic practice. Its use can have a significant impact on reducing lens damage, increasing procedural safety and increasing clinical efficiency. Multicentre validation and increased lens compatibility testing are ongoing.