Haag-Streit AT900 C

This used Haag-Streit AT900 C applanation tonometer is the classic slit lamp mounted unit found in ophthalmology and optometry clinics worldwide, prized for its accuracy and durability in everyday intraocular pressure measurement. The AT900 C mounts directly onto a compatible Haag-Streit slit lamp and uses the Goldmann applanation principle, giving practitioners a reliable, repeatable reading that remains the clinical gold standard for glaucoma screening and monitoring. Its rugged construction and simple mechanical calibration mean these units tend to stay in service for many years with only routine care. This particular unit has been in active clinical use and shows normal cosmetic wear consistent with its service history, but it remains fully functional and ready to be integrated into a slit lamp workstation. The tonometer arm, prism holder, and measuring drum are all present, and the device operates smoothly through its full measurement range. Clinics upgrading their exam lanes or building out a secondary or backup station will find this a cost effective way to add a trusted Goldmann style tonometer without paying new equipment pricing. We recommend verifying calibration with a standard test bar upon receipt and periodic recalibration per office protocol, as is standard practice with any pre owned applanation tonometer. This AT900 C is well suited for general ophthalmology, optometry, and vision screening practices that need dependable IOP measurement integrated with their existing Haag-Streit slit lamp platform.