Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
(a) Photograph of a sample of the PMMA microprism we fabricated; (b) partially enlarged view of the microrelief under an optical microscope; (c) photograph of the fabricated PMMA anti-fatigue glasses based on microprisms for preventing eyestrain.
