Air pollution occurs everywhere, either in the open air, or indoors. One source of indoor air pollution that is not yet widely known by humans is air freshener. The use of air freshener gives the impression of air to be fresh by the scent emitted. Air freshener contains various organic volatile compounds (VOCs) that can endanger health, such as formaldehyde. In addition to the use of air freshener, granular activated carbon is widely used by people to absorb pollutants in the room air. Exposure to low concentrations of formaldehyde does not show significant damage to the cornea but, over a long period of time, cell morphology changes and tear production abnormalities (Lai Li-Ju, 2013).