Arthritis and Diseases That Affect the Hand and Wrist. Many forms of arthritis and related conditions like carpal tunnel syndrome and ganglion cysts cause pain, stiffness and swelling. Read More >>. The hand, wrist and finger joints are prone to several types of damage including fracture, pain and tendon injury. Read More >>.
Marijuana and the Eyes. Marijuana has a few key effects on the eyes. One of the most noticeable occurs shortly after smoking the drug: redness of eyes. THC in marijuana lowers blood pressure which dilates the blood vessels and increases blood flow throughout the body.
All forms of the drug are mind-altering and the drug's psychoactive effects occur within minutes of inhalation, usually lasting anywhere from 2-4 hours. Most experts assert marijuana has no athletic-related performance-enhancing potential and, under its influence, is believed to: 1  Impair hand-eye coordination. 2  Reduce reaction timing and motor coordination. 3  Reduce motor coordination and perceptual accuracy.  Impair 1  concentration. Increase heart rate and fatigue.