1 1dk is equal to 82.6 1mmhg. 1Kdk equals 7.5 1mmHg, so 1 1dk equals 82.6 1mmhg. Pa and mmhg are both units of pressure measurement. Mercury is one of the units of mercury column, pressure and pressure value, but it is not SI unit. Commonly used are cmHg and mmHg. 1 1dk conversion oxygen permeability is 20%; 1 1dk has a low oxygen permeability, so it is not suitable for wearing for a long time and for several consecutive days. If you wear it occasionally and wear it for a short time, it is ok. If you wear it for a long time, it is recommended to choose cosmetic contact lenses made of silica gel hydrogel, whose oxygen permeability is basically above 150dk. Beauty contact lens is a kind of contact lens. After wearing it, it will directly wear the cornea, and it will easily lead to bacterial reproductive infection and inflammation.