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.
To analyze and discuss the importance of CG envelopes. CG affects the physical configuration of the aircraft, aerodynamic performance and load carrying capacity. Landing - Unable to flare (pitch up) at low speeds, the aircraft is too nose-heavy. Take off - Unable to produce enough moment to rotate the nose. Possible damage to the airplane when landing. disturbance due to a gust.