Goldmann Applanation Tonometer for Intraocular Pressure Measurement

The Applanation Tonometer is a precision ophthalmic diagnostic instrument used to measure intraocular pressure (IOP) by determining the force required to flatten a defined area of the cornea. Goldmann-type applanation tonometry is widely regarded as the clinical reference method for IOP measurement and is commonly used during glaucoma assessment and routine ophthalmic examinations. Most models are designed for mounting on a compatible slit lamp microscope. Key Features & Specifications - Type: Contact applanation tonometer - Measurement principle: Goldmann applanation principle - Application: Measurement of intraocular pressure - Typical measuring range: 0–80 mmHg depending on model - Measurement method: Measures the force required to flatten a fixed corneal area - Measuring prism: Optical applanation prism - Typical applanation diameter: Approximately 3.06 mm - Mounting: Designed for installation on compatible slit lamp microscopes - Reading: Mechanical measuring/drum dial on conventional models - Clinical applications: Glaucoma screening and monitoring, ocular hypertension assessment and routine ophthalmic examination - Construction: Precision-engineered metal mechanism with prism holder and measuring arm - Calibration: Periodic calibration/checking recommended using the manufacturer's calibration system - Operation: Commonly used with topical anaesthetic and fluorescein during Goldmann applanation measurement - Reusable prism: Available on many models; requires appropriate cleaning and disinfection between patients - Suitable for: Ophthalmology hospitals, eye clinics, optometry centres and diagnostic facilities.