3D Printed Frenzel Goggles

Frenzel goggles have been an essential tool for evaluation of involuntary eye movements. However, commercially versions of Frenzel goggles have major disadvantages including significant weight, size, and cost. Our design utilizes 3D printing to develop an affordable and customizable pair of Frenzel goggles for both adults and children.

Proof of concept study. Two glass biconvex lenses (Ajax Scientifics©) of a focal length of 50mm were purchased from a scientific distributer. Using Autodesk Fusion 360® we designed and 3D-printed a goggles casing to securely hold the two lenses. A Velcro strap was used to keep the goggles on our tester’s head. Lighting was provided via two detachable LED button lights, attached to internal lateral walls of the goggles.

Overall, this model cost approximately $31.60CAD along with the printing, LED light units, Velcro strap, and two biconvex lenses. The focal length of lenses and the face-sealing design of the goggles eliminated visual fixation target, and the attached lights appropriately illuminated patient’s eyes for observation. Its adjustable strap allowed accommodation of various head sizes, including pediatric patients.

Our 3D printed Frenzel goggles were able to improve patient comfort, provide clear magnified view of the eyes while eliminating visual fixation, and were significantly more affordable than traditional Frenzel goggles.