order your crutch glass now - take your own measurement - English - YouTube
How many days would it take to remove ptosis if I use ptosis crutch glasses? - Quora
World Optic - Ptosis Eye Crutches
A simple new method for the construction of a ptosis crutch - Walsh - 2006 - Ophthalmic and Physiological Optics - Wiley Online Library
A Modular and Adjustable Ptosis Crutch as a Non-Surgical, Low Cost Solution for Elevating the Upper Eyelid in Myasthenia Gravis - Document - Gale Academic OneFile