美国采购需求：平顶镜片、Rx镜片、防蓝光镜片、防蓝光镜片、光学镜片、眼镜片

I'm reaching out to inquire about the availability of product lines, specifically transitions xtra options. Could you provide detailed information regarding the wholesale pricing for both the versions with and without a certain feature? It would be helpful to understand any volume discounts or pricing tiers you may offer as well. Additionally, I'd appreciate any insights on lead times for orders and minimum purchase quantities. Knowing this information will help me make an informed decision moving forward. Please let me know if there are any catalogs or product sheets available that I can review for further details.