1. Introduction
- continued
1.
2a
Indications for use
The Perkins Mk3 Tonometer is used to measure intraocular Pressure (IOP) which is
the fluid pressure inside the eye.
1.
2b
Purpose for use
The Perkins Mk3 Tonometer is an essential tool used in the global examination of all
eye check-ups and specifically for a glaucoma examination, these tests together
give a complete picture of the patient’s ocular health and are therefore important in
understanding the risks of developing and/or controlling diseases such as cataracts,
macular degeneration, or glaucoma. The following tests make up a glaucoma
examination:
• medical and ocular history
• visual acuity testing
• refraction to measure the glasses or lens correction
• tonometry testing for IOP
1.
3
Brief Description of the Appliance
The Applanation Tonometer functions according to the “Goldmann” method:
The measuring of the pressure required to maintain a uniform applanation of
the surface of the cornea.
• The intraocular pressure in mm Hg is found by multiplying the drum reading
by ten.
• Scleral-rigidity is not to be taken into account as the small volumetric
displacement of 0.56 mm3 increases the intraocular tension by about
2.5% only.
Hospital and Optician use only
Caution:
Federal Law restricts this device to sale by or on the
order of a physician.
Caution:
Massage effect DOES occur if repeated measurement occurs.
3
en
!
!