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.
Hail is water that gets caught in strong upward moving winds. The water will freeze, then start to fall, with more water attaching to the hailstone. This can get sent back up into the freezing air several times. Each time it goes up, a layer of ice is formed. Once the hail is too heavy or the strong upward winds weaken, the hail will fall to the ground. While most hail is small, some hailstones can be as big as softballs. University of Illinois Extension | University of Illinois at Urbana-Champaign | College of ACES Â© 2018 University of Illinois Board of Trustees | Privacy | EEO