.In order to protect harmful ultraviolet rays from eye, coating UV solution
..to plastic lens was common .
...However, UV-400 lens is special because it intercepts ultraviolet rays
..without any treatment.

UV-400 lens is produced by mold which uses for non-treatmented,

ultraviolet rays, interceptive, plastic lens.

.And, UV-400's interception effect for ultraviolet rays-A, ultraviolet rays-B and ultraviolet rays-C is outstanding. (Better than nomal UV solution coated lens)

Moreover, uniformity of interception rate is one of the special features.