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.
The percentage of people saying they were very worried about terrorist attacks while flying fell by half, from 25 percent to 12 percent, while the percentage expressing no worry rose 16 points, to 56 percent. Frequent fliers were far less likely to express concern than infrequent fliers or those who've never flown.