Poison ivy is all green. The stem of poison ivy is brown and cylindrical, while blackberry and raspberry stems can be green, can be squared in cross-section, and can have prickles. Raspberries and blackberries are never truly vines; that is, they do not attach to trees to support their stems.
Occasionally, these blood vessels can burst and led to hemorrhage (bleeding) that appears as a red patch on the white of the eye. In the majority of cases, this type of bleeding (called subconjunctival hemorrhage) occurs without a known cause. Subconjunctival hemorrhage can also result from certain medical conditions including trauma, high blood pressure, eye infections, and bleeding disorders. The straining associated with vomiting, coughing, or sneezing can also sometimes lead to subconjunctival hemorrhage. Stress is not a recognized cause of subconjunctival hemorrhage. The good news is, if you had a conjunctival hemorrhage, these are only cosmetically annoying but go away and do not endanger the vision.
Broken blood vessels occur when a tiny blood vessel bursts under the clear surface of your eye (also known as the conjunctiva). Think of it as a painless bruise on your eye. In spite of its gruesome appearance, a subconjunctival hemorrhage should not cause any pain, discharge, or change in your vision.he official name for a broken blood vessel in your eye is a subconjunctival (sub-kon-junk-TIH-vul) hemorrhage. Symptoms of this condition include: 1  Bright red patch on the white of the eye. 2  A slight sense of fullness in the eye or under the lid. 3  Very mild irritation of the eye.