Eyewear has a detachable, light-blocking shield including a vent which enables airflow for moisture management and wearer comfort. The eyewear's nosepad can include a nosepad vent, and a temple can include a fluid channel and temple vent for further facilitating airflow and moisture management. The vent of the shield can direct airflow into a region behind a lens of the eyewear and increase the volume of air flowing across an inner surface of the eyewear lens and through the fluid channel.