<unk>  is the procedure eye care professionals perform to determine the intraocular pressure (IOP), the fluid pressure inside the eye. It is an important test in the evaluation of patients at risk from glaucoma. Most tonometers are calibrated to measure pressure in millimeters of mercury (mmHg).
Ocular tonometry
Scanning laser ophthalmoscopy
Ophthalmoscopy
Retinal vessel analysis
Corneal topography
Photoacoustic imaging
Fundus photography
Exophthalmometer