An "ECO tonometer" is a type of tonometer used to measure intraocular pressure (IOP) in the eye. Intraocular pressure is the fluid pressure inside the eye, and it's an important aspect of eye health to monitor, especially in conditions like glaucoma, where elevated intraocular pressure can lead to optic nerve damage and vision loss. The "ECO" in ECO tonometer might stand for "Electronic Contact Ophthalmodynamometer." This type of tonometer typically uses electronic sensors and probes to measure intraocular pressure. Contact Method: ECO tonometers usually involve direct contact with the surface of the eye. The device gently touches the cornea to measure the pressure within the eye. Electronic Sensors: These tonometers utilize electronic sensors to detect changes in pressure. When the probe makes contact with the cornea, it measures the force required to slightly flatten the cornea, providing a measurement of intraocular pressure. Digital Display: ECO tonometers often have a digital display that shows the measured intraocular pressure in millimeters of mercury (mmHg) or another applicable unit. Accuracy and Precision: These tonometers are designed to provide accurate and precise measurements of intraocular pressure, which is essential for monitoring eye health and diagnosing conditions like glaucoma.