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.
Causes of Broken Eye Blood Vessels. Broken blood vessels do not cause pain. Photo Credit red eye image by Ken Marshall from Fotolia.com. A broken blood vessel in the white of the eye, also called a subconjunctival hemorrhage, may look painful, though the bright red area does not cause damage to the eye.