In some cases, the vitreous gel can peel the retina away from the back of the eye, resulting in a macular hole or retinal tear. This can progress into a retinal detachment if left untreated. Injury or trauma Very occasionally, an injury to the eye or trauma can result in a retinal detachment.
Breathing at higher altitudes might be especially difficult if you have COPD as well as another condition, such as high blood pressure, heart disease, or diabetes. Being exposed to high-altitude conditions for more than several days can also affect the heart and kidneys.
UNDERSTANDING GROUND EFFECT. What is ground effect (GE) and how does change the way your RC heli reacts while hovering close to the ground? First off GE is not just limited to helicopters; anything that is flying close the ground will experience it.