The Tonometer\'s principle is by measuring pressing depth to calculate
the intraocular pressure. Every scale on the gauge of the tonometer represents 0.05mm depth. When achieved the pressing depth, the intraocular pressure can be picked up in the Calibration Scale for tonometer table.
The tonometer is a mechanical pressing type. It is set up by mechanical parts, such as scale, bracket, indicator, arched claw, fixation weight, pressing needle, calibration ring etc
The tonometer is a medical instrument needn\'t electricity, short-term using in clinic. It is safe, reliable, practical, accurate, cheap and easy to carry. The pressing needle and the calibration ring, contacting with corneal directly, are made of excellent stainless steel, which is rustless, antacid and having no reaction with biology organism.
For measuring intraocular pressure
Direction for use
1. The tonometer should be “0” position checkedon calibration platform every time before use. It is valid only when the indicator\'s original positionis at “0” If the indicator does not point to “0”, you can loosen the fixation screw, revolve the calibration ring and put thetonometer on the calibration platform to adjust until the indicator is at 0” exactly. After being checked, the fixation screw should be fixed. In addition, if pressing needle is not flexible for vertically up and down movement, you can first remove the 5.5g weight, then take out the pressing needle and clean it by tampon.
2. To avoid eye cross-infection, the bottom of the calibration ring and the pressing needle should be sanitized with 75% alcohol before use. Please be cautious the tonometer can\'t be used until alcohol totally volatilized, or the corneal will be burned.
3. Let the patient lie supinely, drop some 0.5-1% pantocain in his eye, ask him to close eyes for about one minute until corneal is anesthetic, and then open eyes naturally. You should notice the intraocular pressure can\'t be measured if there is innervation in eyes. In addition, when one eye is taking measurement, the other should be staring at an object to fix up the eyeball. For the reason the position of eyeball affects measuring result, it\'s best the measured eyeball is vertically upward. When the above is got ready, the operator can use the thumb and the index finger of the left hand to separate the patient\'s lower and upper eyelids, press on the fringes individually without pressure on eyeball. With the right hand,put the bottom of the calibration ring on the center of corneal vertically, make only the weight of the tonometer press corneal.
4. Please use 5.5g weight to measure first,if the indicator lies between “0” and “3”,weight 7-5g, 10g or 15g can be added respectively.Whenever measure intraocular pressure, normally the right eye first, then the left eye. The pressure (kPa) can be picked up in the attached Calibration Scale for tonometer table according to the pressing depth. People\'s normal intraocular pressure is less than 2.8KP& (2lmmHg), but a few exceptions exit. If the pressure is above 3.3Kpa(25mmHg), pathologic phenomenon may occur, the further examinations are necessary
1 x 10g weight
1 x 15g weight
1 x Calibration Platform (glass)
1 x Brush
1 x Tonometer Instruction