Tonometers, originally designed exclusively to measure intraocular pressure, can be used to assess tissue stiffness in epileptogenic brain tissue; however, the current technology has the significant limitation of requiring a perpendicular angle for accurate assessment and the tactile point/ tip is not well suited for the topography of the brain (gyri and sulcus). To overcome this obstacle, the operating table must be adjusted to uncomfortable positions mid-surgery and multiple readings are required to achieve an accurate measurement, resulting in time consuming delays in surgery. The brain tonometer proposed here modifies the existing tonometer, resulting in a new device that is ideal for measurement of brain tissue stiffness. The tip and supporting arms of the tonometer is redesigned such that it does not require a large contact area and can grip the small gyri in the brain. Furthermore, in contrast to the existing tonometer which relies on gravity to operate the tip, the redesigned brain tonometer controls extension/ retraction of the tip via battery powered operation. These modifications result in an entirely novel tonometer that can measure pressure from virtually any angle, thereby increasing versatility and accuracy for measuring brain tissue stiffness and allowing for improved diagnostic power and understanding of epilepsy.