Guide to Install Prescription Lenses
（This page is intended solely for prescription lens versions of glasses.）
Origin and Disclaimer for Prescription Glasses:
The prescription lens version of our glasses was created by adding a prescription lens on top of the non-prescription version. As a result, the frame's thickness and weight are increased, which may affect user comfort. We do not generally recommend purchasing this version due to the potential for a less comfortable experience. However, we introduced the current prescription lens option to meet the needs of some customers who requested it and wanted to give it a try.（Custom Edition）
!!! Please NOTE that we do not offer prescription lenses; you can purchase them locally.
Materials Needed:
- Rounded Polarized Sunglasses with Adjustable ND Filter
- Prescription lenses (to be obtained from your local optician)
- Adapter ring (included and shipped with ZYRA™sunglasses)
- Microfiber cloth (to clean the lenses and sunglasses)
Step-by-Step Instructions:
Get Custom Prescription Lenses
Visit an optician or lens provider and ask for prescription lenses with a refractive index that fits your needs (1.56 or higher may be recommended).
Provide the sunglasses' measurements to ensure compatibility, especially noting the thickness and width of the lens area. For the ND9 Vision Pro-ZYRA, the width should be around 47mm.
Check for Lens Adapter Ring Compatibility
Confirm that the ring is compatible with prescription lenses of the required thickness (e.g., 5mm or thinner).
The adapter should be able to accommodate lenses between -100 and -400 degrees of prescription, Unfortunately, lenses for astigmatism cannot be used.
Prepare the Sunglasses
Clean the frame and lens area with a microfiber cloth to remove dust and ensure a smooth installation process.
Align the Prescription Lenses with the Adapter Ring
Position the prescription lens carefully within the adapter ring. Make sure it fits snugly into the ring's frame without forcing it.
If needed, add a slight extra degree (e.g., +25 degrees) to the prescription to account for the sunglasses’ thickness.
Insert the Prescription
Gently snap the adapter ring (with the prescription lens) into the designated lens area of the sunglasses.
Ensure that the lens sits securely and is flush with the sunglasses' frame. If there’s no adapter ring, directly insert the lenses into the frame by gently pressing them into place.
Test the Fit
Once the lens is installed, ensure that the sunglasses’ adjustable ND filter mechanism still operates smoothly. There should be no obstruction or misalignment.
AdjustmentsIf the lenses do not sit perfectly or the filter
mechanism becomes obstructed, remove the lenses carefully and realign them. Ensure the lenses are properly cut and adjusted for the sunglasses.
Installation Video
For a visual guide on how to install the lenses, check out this video:
