A mass airflow sensor. A mass (air) flow sensor (MAF) is used to find out the mass flowrate of air entering a fuel-injected internal combustion engine. The air mass information is necessary for the engine control unit (ECU) to balance and deliver the correct fuel mass to the engine. Air changes its density as it expands and contracts with temperature and pressure.
Over time, scar tissue that forms from bleeding can cause the retina to detach from the wall of the eye (retinal detachment) and cause loss of vision. Severe proliferative retinopathy may be treated with laser surgery in order to save vision.
Retinal hemorrhage is bleeding from the blood vessels in the retina, inside your eye. Your retina is the thin layer that lines the back of your eye. Medical conditions, such as diabetes, high blood pressure, anemia, or leukemia. Eye problems, such as macular degeneration, or a bulging of the blood vessels in the retina.