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 clouds where the sleet falls from are warmer than the air below. The sleet begins as rain and, as it falls, freezes, becoming rather small ice pellets. <br /><br /> Hail, on the other hand, is a weather phenomenon occurring in summer storms. Rain falls from the warmer bottom of storm clouds.