Exercises using a cable puts muscles under a constant tension. With free weights, the angle of joints are often changing, thus the resistance on the muscle is also changing. Under constant tension, blood flow is often increased, thereby resulting in quicker and bigger pumps.
News. Premature birth causes blindness among babies. Consultant eye surgeon at the Eye Hospital and co-ordinator of childhood blindness, Dr. (Ms.) Mangala Gamage said the new cause for blindness is Retinopathy of Premature babies (ROP), a disease of the retina among prematurely born babies.
When fatty plaque deposits build up in blood vessels (due to, for example, diabetes, high blood pressure, smoking, or high cholesterol) and make them narrower, small pieces of plaque can break off from a blood vessel wall and block blood flow to the eye, causing temporary blindness. Other causes of temporary blindness include: Chemicals: Many chemicals can cause temporary blindness when sprayed in the eyes (i.e. pepper spray, mace, or even cleaning products). Conversion disorder: If you are experiencing severe psychological or emotional stress, you may experience a conversion disorder.