Growths on the surface of the eye can be unsightly and frightening. Most growths on the eye, which often occur as people age, pose no threat to health or vision and aren&rsquo;t cancers.
The unit of measure for static pressure is often inches of water (in. water). one inch of water is the suction needed to draw water up a straw one inch. pound per square inch static pressure (1 psi) is equal to 27.7 in. water static pressure. static pressure is given as Pascals (Pa).
When pressure is measured relative to absolute zero pressure, it is called absolute pressure. On the other hand, pressure measuring devices often use gage pressure, which is measured relative to atmospheric pressure. Standard atmospheric pressure at sea level is 101.3 kPa or 14.7 psi.