The optic nerve is the nerve that connects the eye to the brain and carries the impulses formed by the retina to the visual cortex of the brain. The choroid is a thin vascular layer between the sclera and the retina that supplies blood to the retina and conducts arteries and nerves to other structures in the eye.
A muscle pull (or strain) occurs when you twist, pull, or tear your muscle or tendon, the strong elastic cord that connects your muscle to the bone. As we age we are more susceptible to muscle pulls. However, you risk a pull if you donât warm up properly before you exercise and stretch a muscle past its limit, train longer than what your body can handle, or if you push a past muscle injury too far before the muscle has had adequate time to heal.
Signs that you are having a muscle bleed: 1  You have trouble moving your arm or leg. 2  You have pain in the muscle. 3  The muscle feels tight or swells up. 4  The muscle feels warmer than other areas of skin. 5  Even when you are resting it, your muscle feels tight or tense when you touch it. 6  The leg or arm feels numb or tingles.