Z-Blue targets wavelengths in the red part of the light spectrum between 580-640nm, which is associated with photosensitivity and other strong reactions in the brain.

In addition, TheraSpecs Z-Blue in max strength features substantially the same filtering properties and performance as Zeiss® Z1 lenses.

Z-Blue does block a small percentage of blue light, but they are not designed as blue light glasses. If you are looking for glasses that target blue light, you should instead consider one of our other lens options like Flex or Contrast HEV for general blue light protection or FL-Pro if you need enhanced protection.

Z-Blue is ideal for any exposure to flashing or other high-intensity lighting. This includes visible flicker from screens, malfunctioning light sources, strobe lights at concerts or sporting events, flashing or fast-motion sequences in movies or video games, emergency lighting on vehicles, and more.

Z-Blue also can help manage sensitivity to disorienting patterns, such as striped designs or sunlight flickering through trees.

We recommend Z-Blue if you are photosensitive or struggle with disorienting environments, with high-intensity lighting or patterns. For extreme photosensitivity, Z-Blue in max strength may be best for you.

If your main concern is sensitivity to fluorescent lights, we recommend starting with FL-Pro.

If you're still not sure, you can answer a few questions and get instant recommendations from our lens assistant.

Absolutely! You can get Z-Blue lenses with your prescription, or with reader correction. Simply tap/click on your preferred frame style above, choose either "Prescription" or "Reading Glasses" under Lens Correction, and complete the rest of the options before adding to your cart.

TheraSpecs can also be made with prism prescription, a further tool for managing visual sensitivity.

You have 60 days for returns or exchanges of all non-custom TheraSpecs, so you can make sure Z-Blue is the best option for your needs. If you are wanting prescription or reader TheraSpecs, we suggest starting with one of our fully-refundable fitover styles.