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.
A. Eyes look red or bloodshot when the tiny blood vessels on the surface of the eye (the conjunctiva) expand and become swollen with blood. Most often, this is due to simple irritation of the eye, from allergies, dust, or dryness. Red or bloodshot eyes are also symptoms of many different conditions that affect the eye.yes look red or bloodshot when the tiny blood vessels on the surface of the eye (the conjunctiva) expand and become swollen with blood. Most often, this is due to simple irritation of the eye, from allergies, dust, or dryness.