Zoff+Shuchu (Concentration): 2-way glasses with detachable hood for creating a focused environment. These glasses cut out unnecessary visual information, reducing the load on the brain's "frontal eye field" (the part of the brain that controls eye movement). They can be used as regular fashionable glasses, or you can attach the included frame to block out your peripheral vision and enhance concentration. Color: Brown Frame Material: Resin/Plastic Condition: No stains, tears, or odors ZN201015A-49A1 I purchased these but never used them, and they have been stored away. They are currently a popular item that is out of stock. The demi pattern and frame shape are stylish. #zoffglasses #zoff #brown #glasses #concentration #ZoffShuchu #fashion #study #reading