5-pack blue light blocking reading glasses, 1.75 computer readers for women and men lightweight with spring hinges huyaopt <br><b>description:</b> <br>super lightweight, as good for reading books. <br>special lens coating for anti scratch/anti smudgy. <br>anti bluelight & uv, effectively protect your eyes from computer radiation damage.</p> <br><b>product specification:</b> <br>product name: bluelight blocker reading glasses <br>material : plastic frame, resin lenses <br>diopter available: +1 / +1.5 / +1.75/ +2 / +2.5 / +3 / +3.5 <br>arm: 5.5" (approx.) <br>lens height: 1.7" (approx.) <br>total frame: 5.43" (approx.) <br>bridge: 0.62" (approx.) <br>glasses weight: 0.04 lb (approx.) <br>packet weight: 0.13 lb (approx.) <br>color : black/gun/brown <br>package includes: <br>bluelight blocking reading glasses*4 </p> <br><b>warm tips:</b> <br>to avoid damage, never clean your reading glasses with tissues, towels,clothing or alcohol, and also avoid using household detergents or soaps. <br>while a few mild soaps don't harm lenses, now some extra strength soaps are powerful enough to slowly disintegrate lens coatings.