IntacsÂ® Eye Surgery. The IntacsÂ® eye surgery procedure usually requires only a one hour office visit. A preoperative exam will determine if a patient is able to undergo IntacsÂ® eye surgery as a treatment for myopia or keratoconus.ntacsÂ® Eye Surgery. The IntacsÂ® eye surgery procedure usually requires only a one hour office visit. A preoperative exam will determine if a patient is able to undergo IntacsÂ® eye surgery as a treatment for myopia or keratoconus.
The Summer Factor: Temperature. Temperature also affects density altitude. When you heat the air, the air molecules have more energy. And, when they have more energy, they spread farther apart. (You probably learned this in high school chemistry class...). When the air is warmer than standard, it's less dense and performance decreases.
Air pressure therefore depends on elevation or altitude (higher up means less air above), the average temperature of the air above the particular location (hot air is lighter than cold air), and what the air's composition is.