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.
Visual loss from glaucoma results from characteristic deterioration of the optic nerve leading to progressive loss of the field of vision. At least 3 million Americans suffer from glaucoma. Glaucoma is one of the leading causes of adult blindness, and it is also the leading cause of preventable blindness. Most people who go blind from glaucoma are blind in at least one eye at the time of original detection, which points to the need for better early diagnosis.