Data on vitrectomy. 1  Patients with proliferative retinopathy have a 33% risk of a vitreous haemorrhage at some time. 2  About 25% of these haemorrhages are recurrent or severe and need a vitrectomy. 3  After vitrectomy about 20% bleed needing a washout.  After vitrectomy, 33% have vision better than 6/18. 3% develop rubeotic glaucoma.
The Earth's atomospheric ozone layer is located in the tropopause, which is located just. above the troposphere. The tropopause is the bottom limit of the stratosphere several. miles above the surface of the Earth.
Q&A Related to Where Is the Ozone Layer Located Where is the Ozone Layer Located? The ozone layer is located in the region of the Earth's atmosphere called the stratosphere. The ozone layer is located in the bottom layer called the tropopause. In what layer of the atmosphere is ozone located? It is in the. stratosphere. located 8 to 50km above sea level. The ozone layer