Exposure to the constant hazards of airborne particles (such as during a sandstorm or cave-in) has made your eyes less susceptible to irritants, such as sand, dust, and even liquids and gases.
Benefit(s): You gain a +2 trait bonus against being blinded by foreign objects (such as from a Dirty Trick combat maneuver) and you halve any reductions in visibility from the environment (such as from certain storms) and their corresponding penalties. For example, if you were in a sandstorm that normally reduces visibility to 25 feet and imparts a –4 penalty on Perception checks, you reduce visibility to 50 feet and take only a –2 penalty on Perception checks.
Pathfinder Player Companion: Kobolds of Golarion. © 2013 Paizo Publishing, LLC; Authors: Tork Shaw, Mat Smith, and Jerome Virnich.