Flash freezing - Wikipedia. In physics and chemistry, flash freezing is a naturally occurring phenomenon, but also used by ..... The surface tension can be defined in terms of force or energy. The surface tension of a liquid is the ratio of the change in the energy of the liquid , ... 2019 Flash freezing Wikipedia2018
Measuring Eye Pressure. Eye pressure is measured in millimeters of mercury (mm Hg). Normal eye pressure ranges from 12-22 mm Hg, and eye pressure of greater than 22 mm Hg is considered higher than normal. When the IOP is higher than normal but the person does not show signs of glaucoma, this is referred to as ocular hypertension. High eye pressure alone does not cause glaucoma.
1 An intraocular pressure of greater than 21 mm Hg is measured in one or both eyes on 2 or more occasions. 2  Pressure inside the eye is measured using an instrument called a tonometer.