Intraocular pressure sensing device and method using sensor based on half Wheatstone bridge

A pressure sensing method of a sensing device based on a Wheatstone bridge, wherein the sensing device includes a half Wheatstone bridge unit including two variable resistors of which resistance values are changed according to an environmental change and a variable capacitor unit electrically connected to the half Wheatstone bridge unit, and

• wherein the pressure sensing method includes,
• generating, by the variable capacitor unit, each of RC delays for the two variable resistors;
• an amplifier amplifying respective charging voltages charged after a time of the respective RC delays;
• and
• comparing the amplified charging voltages and outputting the compared charging voltages as digital values.

An implant for treating an eye disease, comprising:

• a distal portion including a snorkel having a size configured to be accommodated in a front of an eyeball;
• a proximal portion extended from the distal portion at an angle and having a shape configured to be accommodated in a part of a Schlemm's canal;
• and
• a pressure sensing device using a sensor based on a Wheatstone bridge, the pressure sensing device including:
• a half Wheatstone bridge unit including two variable resistors of which resistance values are changed according to an environmental change;
• a variable capacitor unit electrically connected to the half Wheatstone bridge unit and generating RC delays for two variable resistors, respectively;
• and
• an amplifier amplifying respective charging voltages charged after a time of the respective RC delays.