Sign up for an Award
Participate with your entry in one of our professional or student awards.Sign up for an award
You are using an outdated browser. Please upgrade your browser to improve your experience.
After the adolescent myopia is very unstable, to adapt to changes in the degree of need for frequent replacement eye glasses. Usually directly with a new glasses, so the old glasses were idle. The principles of the design basis refractometer, the glasses process to be improved, devised the "spectacle film" with a degree, can be directly attached to the original lens spectacles up change, achieve "replacement of glasses" effect.
Hunan University of Science and Tec