3in1 Rectangle Sunglasses: How to Use Every Mode

By Eagle Eyes Optics | Published: 2026-10-29

Category: How-to Guides

Learn how to switch between sun, blue-light, and night modes on the Eagle Eyes 3in1 Rectangle sunglasses. Step-by-step guide with common mistakes.

Quick answer

The 3in1 Rectangle sunglasses use a magnetic system to swap between TriLenium polarized sun lenses, blue-light blocking lenses, and Night-Lite lenses. Here is how to switch modes correctly.

Why the magnetic system matters

The 3in1 system uses magnets to attach accessory lenses to the DigiTec base frame. This means no tools or clips to fiddle with, but it also means you need to align the lenses properly for a secure hold.

Common mistake: forcing the lenses

Do not press the lenses onto the frame with excessive force. The magnets will pull them into place when aligned correctly. Forcing them can misalign the lenses or scratch the coating.

How to switch modes on the 3in1 Rectangle

Start with the base frame: Wear the DigiTec base frame alone. This is your clear-lens mode for indoor or low-light use. Check that the frame sits comfortably and the temples are adjusted to your face. If the frame feels loose or tight, adjust the temple arms before adding lenses.
Attach the TriLenium sun lenses: Hold the TriLenium lens module near the front of the base frame. The magnets will pull it into place when close enough. Center the module so it clicks into the frame evenly. This is your sun mode for outdoor use. If one side lifts off, the module is not centered. Remove and reattach.
Swap to Night-Lite for driving after dark: Remove the sun lens module by gripping the outer edge and pulling it forward. Align the Night-Lite module the same way until it snaps into place. Use this mode to reduce glare from oncoming headlights. Never drive with the sun lenses at night. The polarization reduces visibility in low light.
Use the blue-light blocking mode: The DigiTec base frame itself includes blue-light filtering for screen use. No lens module is needed. Simply wear the frame alone when working on a computer or phone. The blue-light mode is always ready. You do not need to carry an extra module for screen time.
Store spare modules safely: When not in use, keep the spare lens modules in the included case. This prevents scratches and keeps the magnets clean. Dust or grit on the magnets can weaken the hold. Check the magnets for debris before attaching a module. A quick wipe with a microfiber cloth is enough.

Product facts

3in1 Rectangle: The 3in1 Rectangle includes TriLenium polarized lenses, Night-Lite lenses, and a DigiTec base frame with magnetic attachment. You get three vision modes in one frame, so you can switch from sun protection to night driving without carrying multiple glasses.
3in1 Rectangle