SEIKO Vision by their website does not appear to be available in the United States (no providers are listed in their directory)-- do you happen to know anything equivalent available there?
Seiko's US website has some PDFs if you do some searching but the JP website is a far better resource, and the products are international for the most part. [1]
You can read about the double aspherics here:
https://www.2020mag.com/article/double-asphericity-a-freefor...
[1] https://www.seiko-optical.com/fileadmin/media/marketing_shop...