The water content of moist air can be measured with no less than six different metrics: Wet Bulb Temperature, Relative Humidity, Absolute Humidity, Degree of Saturation, Humidity Ratio (also known as Mixing Ratio), and Specific Humidity.
You can use a sextant to determine the position (called the âshootâ) in the sky of the sun, moon, or other celestial body, as well as your longitude. Although its design looks complicated, with an understanding of how it works and practice, you can reliably use it to find your position. Ad.
1 Eye pressure. 2  Tonometry measures the pressure in the eye (intraocular pressure, or IOP). 3  Vision tests. 4  These include tests to check for visual acuity and loss of side and central vision (perimetry testing). Tonometry measures the pressure in the eye (intraocular pressure, or IOP). 2  Vision tests. 3  These include tests to check for visual acuity and loss of side and central vision (perimetry testing). 4  Cornea thickness. 5  Tests such as ultrasound pachymetry measure the thickness of the clear front surface of the eye (cornea).