User`s guide

10
68E34 41 Rev.G
Introduction (continued)
Device Description
The Reichert Tono-Pen XL is a precision electronic tonometer which
measures intraocular pressure (IOP). The body of the instrument is
specially designed to t comfortably in the user’s hand, facilitating
fast and accurate measurements. The stainless steel probe on the
Tono-Pen XL contains a solid state strain gauge which converts
intraocular pressure (IOP) to an electrical signal. The probe tip must be
covered by a protective membrane. Reichert Ocu-Film
®
Tip Covers are
recommended.
Utilizing a sophisticated “single chip” microprocessor and electronics
housed in the body of the instrument, the waveform produced by each
touch to the anesthetized corneal surface is analyzed and stored for a
statistical comparison process. Each single valid IOP reading is digitally
displayed on the liquid crystal display (LCD). When four valid readings
are obtained, the mean IOP and the standard deviation for those
readings (an indication of reliability) are shown on the LCD.
Features
The Tono-Pen XL tonometer has the following features:
• Easy to use - IOP can be measured reliably by medical professionals.
• Portable - The Tono-Pen XL tonometer weighs just 59.4 g (2.1 oz) and
is battery operated.
• Accurate - The measurements from the Tono-Pen XL tonometer
correlate strongly with Goldmann applanation tonometry and direct
measurements of IOP.
• Versatile - The Tono-Pen XL tonometer may be used easily with the
patient in any position, making the instrument suitable for the office, in
glaucoma clinics, at the hospital bedside, and in remote locations.