They live in a nest ruled by a queen who is helped by smaller female (worker) bumblebees. Spring. The lifecycle begins in spring, when rising temperatures awaken a queen bumblebee that has been hibernating alone in the soil.
You might not have symptoms in the early stages of diabetic retinopathy. As the condition progresses, diabetic retinopathy symptoms may include: Spots or dark strings floating in your vision (floaters) Blurred vision. Fluctuating vision. Impaired color vision. Dark or empty areas in your vision. Vision loss.
Diabetic retinopathy is caused by changes in the blood vessels of the retina. When these blood vessels are damaged, they may leak blood and grow fragile new vessels.When the nerve cells are damaged, vision is impaired. When this occurs, blood and fluid leak from the retinal blood vessels and fatty material (called exudate) is deposited in the retina. 2  This causes swelling of the retina and is called diabetic macular edema.