Prototypes
The ptosis crutch was prototyped using a combination of 3D printing and manual manufacturing.
The ptosis crutch was prototyped and tested from the first generation. It was the rapid production and interaction with the world that lead to the development of the final product. The components of the crutch were 3D printed using several different materials before failure testing of each material was performed. The failure testing involved testing the durability of the device when being attached/ detached to the spectacles as well as when operating the adjustable components

Failure analysis
Following the clinical validation of the ptosis crutch, a Failure Modes and Effect Analysis (FMEA) was performed. FMEA is a tool that uses a bottom-up approach. A design FMEA was performed to determine any possible failures of the device that may occur in the prototyping process as well as during the use of the ptosis crutch.

Attachment – successful.
Crutch bar housing - successful.
Control – successful.
Ultrat Attachment - successful, provide sufficient flexibility for the clip mechanism.