Mentor O&O Tono-Pen II

This used Mentor O&O Tono-Pen II is a handheld applanation tonometer that established itself as an office standard for quick, reliable intraocular pressure readings well before the newer digital models arrived. It uses a small probe tip with a strain gauge sensor to take a rapid series of individual applanation measurements, then computes and displays an averaged IOP value once enough consistent readings have been captured, flagging any results that fall outside a statistically valid range. Because the probe requires only topical anesthesia and a brief touch to the cornea, it remains a fast, portable alternative to slit lamp mounted Goldmann tonometry, particularly useful chairside, at bedside, or in mobile screening settings. Clinically, this unit supports glaucoma screening, ongoing IOP monitoring, and general anterior segment workups in optometry and ophthalmology practices, as well as in primary care and urgent care settings where a dedicated slit lamp is not available. Its compact, pen-style body allows a clinician to work comfortably at any angle relative to the patient, and the audible confirmation tone gives feedback during measurement without requiring the operator to watch a display continuously. The tip covers are disposable, so the device is intended to be used with fresh single-use covers for each patient encounter to maintain proper hygiene and measurement accuracy. As a pre-owned instrument, this Tono-Pen II is offered in working condition and represents a budget-friendly way for a practice to add a second tonometer, outfit a satellite location, or keep a reliable backup unit on hand. Buyers should expect a legacy design consistent with its generation, and should plan on sourcing new disposable tip covers and, if needed, a battery replacement or calibration check as part of routine setup before placing it into clinical use.