Vitrectomy Surgery. updated. Sometimes, a vitreous hemorrhage can clear up on its own. If vision does not improve, vitrectomy surgery may be necessary. A vitrectomy is a surgical procedure that is performed to remove the clouded vitreous gel in the center of the eye.
Hail is generally associated with spring thunderstorms but may occur at any time of year. Hail is formed in huge thunderhead (cumulonimbus) clouds (Munez, 2000). During days when the soil is heated by the sun, the air near the ground also is heated.
The tropics have lots o â¦ f thunderstorms but not as many generate hail. Some of the most frequent hail occurs in mountainous areas due to the orographic lift that allows updrafts to become stronger. It is very common and hail can be quite large in northern India and parts of China. Hailstorms can also occur frequently across much of Europe.