Tonometers are devices, which measure eye pressure by measuring the refractory resistance of the cornea against radial indentation caused by accommodation. The eye's pressure against the retina is measured in millimeters of mercury. Your eye care provider will use one of many different methods to measure this pressure within your eyes. Various practitioners use optical fiber microscochlear analysis combined with infrared light source tomography or fluoroscopy to determine eye pressure and correction.
For those practitioners wanting to obtain more clinical significance from their measurements, a digital multi-functional model is ideal. If you are a primary-care physician, you probably have special types of tonometers which are attached to a stethoscope to obtain a footplate reading. The advantages of a footplate reading include intraocular pressure, which is difficult to obtain through other measuring techniques, usually an incompatible surface with the patient's eye. In addition, using a footplate may also limit the patient's range of motion during the measurement process. If you are planning to purchase a portable or retractable multipurpose tonometer for your practice, consider purchasing the type which provides the most accurate measurement of both regionalism and global intraocular pressure.
If you are a practice specializing in the diagnosis of glaucoma, you should consider using automated observation tonometers. This instrumentation is very similar to the previously mentioned multi-function handheld tonometer, only this measurement method is different. The difference is that an eye pressure reading is obtained by placing the finger on a small strip of translucent glass placed in front of the eye, directing light energy entering the eye through the prisms located on the glasses. A computer reads the reflection produced by the light, and this information is interpreted by the machine.
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