Follow along with the video below to see how to install our site as a web app on your home screen.
Note: this_feature_currently_requires_accessing_site_using_safari
To expound on this a little further - The method of holding the lens in place on Blade, M Frame, and M2 glasses is to mis-match the curve of the frame and lens. Putting them together requires both to flex and the tension, along with the friction from the lens in the frame, keeps everything in place. You're in essence loading it like a spring.The cracking was due to the curvature of the lense inside the frame putting stress on the frame. Result...cracks.
This sounds odd to me. They were described as being used (read: not new) condition, but never actually used (red: worn)?Was told they were used but never worn
To expound on this a little further - The method of holding the lens in place on Blade, M Frame, and M2 glasses is to mis-match the curve of the frame and lens. Putting them together requires both to flex and the tension, along with the friction from the lens in the frame, keeps everything in place. You're in essence loading it like a spring.
To borrow the definition of Static Fatigue from the science dictionary.org
--"The phenomenon of a material failing at a smaller load than that required to cause short-term failure, after a period of constant loading by the smaller load; the load necessary to produce static fatigue decreases with increasing time under load. In brittle materials, static fatigue is due to the slow growth of sub-critical cracks to a length at which they will propagate catastrophically; in ductile and/or viscoelastic materials it is due to the progress of plastic or viscoelastic deformation ie creep to the point where catastrophic yielding can occur."
The early plastic used in Oakley's frames were thin and brittle.
This sounds odd to me. They were described as being used (read: not new) condition, but never actually used (red: worn)?