I you fly frequently consider just how critical humidity is relative to your ocular comfort. The humidity in a pressured airplane cabin is likely as low as 10% and studies have shown that this level of humidity sustained for as little as 1 to 3 hours can be associated with significant mucosal irritation (eyes, skin, and upper airways). The Transportation Security Administration (TSA) requires liquid solution bottles that are “carried on” to be less than 3 ounces (~88.7 mL). It is important we remember this in the care of our “frequent flyer” patients – whether it be ocular lubricants, therapeutics, or contact lens care solutions.