What Are Devices To Measure Eye Pressure?
The ophthalmic instrument used to measure eye pressure is named the digital tonometer. The eye pressure tonometer device has rebound tonometer, non contact tonometer, and applanation tonometer. However, applanation tonometer has to be connected to one set of ophthalmic slit lamp to examine eye pressure. Non contact tonometer is a very professional ophthalmic equipment machine, therefore, it asked the user to be very professional too, the same as an ophthalmologist.
Rebound tonometer is a very nice measuring eye pressure device, that has complete functions and is affordable. Rebound tonometer is also easy to measure, load the probes, align them with the eye, and press the button, and results will be available in seconds. Importantly, the rebound tonometer in Hongdee works with 2 AA batteries and is matched with one wireless infrared printer, so you can print the measure results immediately. And the printer is with one power cable to recharge.
Rebound tonometer is composed of probes, measurement system, and display system.
Browse interface
Install and Connection
- Check the package to see if anything missing.
- Install the batteries into the container refer to the picture below.
- Press the power switch, to enter into the measure state.
See picture 4: remove the battery lid of the tonometer, according to the direction of the arrow.
See picture 5: put two AA batteries into the battery box, battery anode facing the battery lid.
Software Operation
1. Interface switch and selection
Press key L and key R at the same time, and you can enter the interface of the main menu, and begin operation under the main menu interface.
Short press key L OR R, and you can switch five interfaces in turn: MEASURE, BROWSE TIME, DELDATE, BACKLIGHT).
Short presses "enter" and enter into the relevant interface.
Press “L" and “R" simultaneously, and turn back to the main menu.
2. Measure the interface
Enter into the right eye measure interface by default.
short press “R at the right eye measure interface, and measure the pressure of the right eye.
short press “L", and switch to the left measure interface at the right eye measure interface.
after finishing, short press "enter" to display the result of the right eye, and press "enter again to save the result of the measure.
long press “enter” when displaying or saving the result of the left and right eye, the measured result can be printed and it displays “print on the screen Short press “L" when measuring the pressure of the left eye at the left eye measure interface.
Short press “R”, and switch to the proper measure interface at the left eye measure interface.
3. Browse the interface
short press“ R” o check the measured values in order.
short press" L" to check the measured values in reverse.
long press “enter”, and print all the saved results, “print" was displayed on the screen.
4. Set time interface
Short press “R” to switch the location which needs to be modified.
Short press “L" to alter the number at the current position.
Short press “enter" to save time which was modified.
5. Deletion of data interface
Short press "enter" to delete all the saving results, and display "no data".
6. Backlight etc. interface
Short press “enter”, to turn on or off the backlight.
7. Turn on or off the machine
Hold down the switch, boot, then you can release the button short press the switch, turn it off, and you could hear two “beeps”. If the device is idle for 3 minutes, then it is automatically shutdown
Note: when the key is invalid, the buzzer beep twice. Switch the machine for less than 5 seconds in intervals.
Measurement
1. Instore probe
- Open the plastic tube which has a probe.
- Aim the tube mouth at the probe mouth.
- Rotating the tonometer, keeping the mouth pin vertically upward, and sliding the probe needle freely.
- Removal of the plastic pipe installed probe.
Notice 1: The first time to use the probe should seek the image by pressing the measure key, to make sure the parts of the probe or the magnetic part and the circus to keep within a certain range. Keep the probe lateral and be far away from the eye when using the probe to seek the image.
Notice 2: The corneal contact lens on sale is preferred to disinfect the probe head, or the equivalent method is also available.
2. Quit the probe
- Long press “R" at the measured interface, tip: "QUIT PROBEI.
- Short press “enter”, pop-up pin, and display "NO PROBE".
- Move the plastic pipes in parallel, and put the pin into a plastic tube into a plastic tube.
- Reverse the tonometer, keep them out of the pin mouth vertically downward, the probe sliding into plastic pipe.
- Install the pin into the plastic tube.
Note: the operation of withdrawing the pin must be completed at the measurement interface.
3. Measurement
1) Patients' preparation:
Select the proper posture to take measures according to the patient's conditions, and explain to patients the process of the measurement to help them relax.
2) Measurement:
A: To enter the measurement interface.
B: To handhold the tonometer's handle and contact the forehead closely, and properly adjust the forehead transducer to make the probe and the central cornea keep vertical, the distance of the probe and the central is 4mm-8mm.
C: Press L to measure the left eye, and the probe rebound and contact with the cornea slightly and recovered quickly. To measure the effective data three times and the computer will work out and show the average automatically. Press R to measure the right eye, and the process is the same with the left
D. In the process of measurement, if the measurement data changes a lot, the measurement data will be cleared.
E. To measure 5 times continuously, if the effective measurement stays the same measurement data will be cleared automatically.
In the process of measurement, the eyes of the measured should keep level, and the posture should cooperate with the operators
3)Hints for measurement errors:
- Failure of detecting the probe after the start, to display “NO PROBE.
- Unsatisfactory image, to display “POOR PROBE.
- The probe is too close to the central cornea, to display “NEAR".
- The probe is too far from the central cornea, to display “FAR”.
- The velocity of the probe without no obvious moves, displays "NO MOVE.
- The velocity of the probe is fast, to display “SPEED HIGH”.
- The velocity of the probe is slow, to display “SPEED LOW”.
- The object is too soft, to display "SOFT”.
- The object is too hard, to display "HARD”.
4) Precautions and common problems in the measurement.
- To keep the probe and the central cornea vertical.
- To support the eyelids with hands is available, but don't sneeze the cornea.
- In the measurement process, the flashing of the battery symbol on the screen means the battery is in low power, and to change a new one. The handle and the vertical angle aren't more than 15 degrees no matter to the left (to the right). Referenced as the picture.
Products maintenance
Maintenance of the products
- The instrument should be installed indoors with good ventilation and avoid direct sun radiation.
- Don't use any causticized cleanser when cleaning the device. Otherwise, it is possible to erode the surface of the instrument. Avoid water or any other liquid running into the keyboard or shell. Turn off the power before cleaning.
- The instrument is key, delicate, and expensive. Do not stress it, knock it or fall it from a high place.
- To check the battery whether is in corrosion; if the instrument is not in use for a long time, please take off the battery.
- It is not permitted that the user himself dissembles the main unit or probe. If there are any problems, please send it to our company and the distributor.
- No strong magnetic or electric field or other high-frequency equipment.
Notice: The waste battery will pollute the environment, please don't litter casually. To dispose of the toxic and hazardous components of the obsolete equipment as required, to avoid environmental pollution.
Cleaning and disinfection
1. After the measurement of the patient, clean the forehead to support contact with the patient's skin with a 75% alcohol cotton ball
2. clean and disinfect the surface of the testing system every week(wipe with 75% alcohol cotton ball), after using the tonometer, it should be placed in a clean box to avoid the dust falling to make sure the exact measurement.
3. clean the screen of the tonometer with the specific paper to avoid scuffing.
Calibration
1. To calibrate the tonometer according to the standard of the imitation to measure the internal pressure of the eye on the application of the tonometer
2. To calibrate the tonometer according to the standard of the imitation to measure the internal pressure of the eye after its repair
Package and transportation
The packed instrument can be transported by transportation vehicles. lt must not be transported together with goods that are easy to burn, explode, or corrode. Also, it should be protected from shock and moisture. The instrument should be stored in an environment with ambient temperature from -20Cto 55'C, with relative humidity under 95%, where there is no corrosive gas, strong mechanical vibration, shock, or magnetic effect. The room in which the instrument is stored should be with good ventilation and avoid direct sun radiation.
To change the probe set assembly
The instrument is not in use for a long time, which will make the inner wall of the probe set stocked, the probe will not work or work less effectively if it is not the problem of the probe slanting or the shortage of power of the battery, it needs to change the probe set.
Rebound tonometer is a hot-sale type in Hongdee, more popular than Icare, same accuracy at a competitive price. You can check your eye pressure at home. Meanwhile, rebound tonometer is available used for animals, such as dogs, cats, and rabbits. Contact us for rebound tonometer specifications and a good price now.