Although the MOSFET is a four-terminal device with source (S), gate (G), drain (D), and body (B) terminals, the body (or substrate) of the MOSFET is often connected to the source terminal, making it a three-terminal device like other field-effect transistors.n the case of an n-type switch, the body is connected to the most negative supply (usually GND) and the gate is used as the switch control. Whenever the gate voltage exceeds the source voltage by at least a threshold voltage, the MOSFET conducts. The higher the voltage, the more the MOSFET can conduct.
Causes of Glaucoma. Glaucoma causes include elevated eye pressure (called intraocular pressure or IOP) due to the eyeâs inability to drain fluid efficiently. A clear fluid called aqueous humor circulates inside the front portion of our eyes.
About 10 percent of those with glaucoma have whatâs called angle-closure (acute) glaucoma, and in these cases a sudden rise in eye pressure can cause: 1  Severe eye pain. 2  Blurred vision. 3  Sudden visual disturbances.  Halos around 1  lights. Reddening of the 2  eye. Nausea and vomiting.