Description
functions:
1. A super function is the measurement of eye axis length.
2.B ultrasonic function is fan scan.
3. IOL calculation function USES 6 formulas to calculate the artificial crystal.
A super wave is the abbreviation of type A ultrasonic wave. It is used to detect the echo of sound wave according to the relation between time and amplitude of sound wave. Its positioning accuracy is relatively high. When ultrasound beam spread in the body’s tissues to meet different acoustic impedance of the two layers of adjacent dielectric interface, produce reflection echo on the interface, each interface, generate an echo, the echo on the oscilloscope screen in the form of wave, according to the acoustic impedance of interface on both sides of the medium range, the echo amplitude is higher; On the contrary, the smaller the acoustic impedance difference is, the lower the echo amplitude is. If the ultrasonic wave propagates in homogeneous medium without interface, that is, when the acoustic impedance difference is zero, it will present a flat section without echo. The echo is arranged on the baseline in the form of wave peak according to the return time. The higher the echo, the higher the wave peak. The formation of one-dimensional images by a-mode ltrasound is difficult to explain the pathological changes, but has A high ability of tissue discrimination. A has high super axial resolution and can display the length of eye axis by LCD digital. The working principle of b-mode ultrasonic instrument is basically the same as a-mode ultrasound instrument. It is by sending a group of ultrasonic waves to the human body, scanning in a certain direction, judging the distance and nature of human tissue according to the extension time and intensity of monitoring its echo, and then forming intuitive two-dimensional ultrasonic images through electronic circuits and computer processing. Generally, the working process is as follows: when the probe receives the excitation pulse, it will transmit ultrasonic waves (at the same time, the probe is controlled by the focusing delay circuit to realize acoustic focusing of sound waves), and then receive the reflected echo signals after a period of delay. The echo signal received
by the probe is processed by filtering, logarithmic amplification, etc., then digital signal is transformed by DSC circuit to form digital signal, further image processing is carried out under the control of CPU, and then sent to the display to form b-mode image.
– the patient is required to lie flat before use, and the eye is given surface anesthesia.
– the probe should be placed directly and smoothly at the central cornea.
– prompt the patient to fixate.
– adequate contact with the tear film for ultrasonic transmission.
– touch lightly and don’t press.
6.2.2A ultra signal acquisition
Click，The working interface of A super appears as follows (as shown in figure 6-2):
Diagnosis of intraocular diseases and ocular trauma by b-mode ultrasound,
Operation process:
Close your eyes slightly while measuring, and then put an appropriate amount of ultrasound coupling agent or saline on your
eyelid.
Step on the foot switch once;
Hold the b-mode ultrasound probe in hand and place it on the patient’s eyelid. Observe the display screen and slightly move the
probe position and adjust the gain size until the b-mode ultrasound interface can clearly see the retina, crystal and other
images.
Step on the foot switch once more to complete the measurement.6.4.2 B
Click，enter B interface 6-6：
18 month after it delivery to your door
During this period,
We promise life long service,if the instruments exceed the warranty period,we will also give advice and good service,but it will charge money for extra spare parts.
1) Our Vision & Our Strategy:
Excellent Quality, Mutual Benefit
To be the bridge Chinese ophthalmic instruments to your country
2)What is your main products?
Shanghai Top View Industrial Co,. Ltd is a leading company with years experience in ophthalmic instruments export business. We specialize in ophthalmic instruments, such as glasses display rack, auto refractometer, keratometer, phoropter, slit lamps, lens edger and other ophthalmic instruments products. The principle of our company is to provide perfect quality, competitive marketing prices, good service and to meet the needs of the customers.
3) what is your company’s advantage?
(1) Better Quality with Lower Price
We always supply the better price on the same quality level, and try our best to save the client’s every cent. Also offer good after service, never ignore the instruments problem since we establish.
(2) located
We are in Shanghai ,which is biggest business center in CHINA. The quality made in shanghai is the best in CHINA ,also very easy to have a ticket to shanghai all over the world, welcome to visit our company.
(3)Export experts
As we have a favorable frame and stable quality control, our products can be found in nearly all continents. Years of export experience, deliver goods by different means: truck, rail, air and sea containers. We know all the country ‘s customs rules, will notice customer in advance ,if the instruments allow import or not, also if need certificate for import and how much import tax will be, have method to save import tax if buyer need.
4) What is your delivery time? What is the payment terms?
The time of delivery is 4-7 days after received your payment, by fast express.15~35 days by sea.2~6 days by air to buyer’s nearest air port.
We accept T/T, L/C, Western Union, or “ALIBABA secured online buying with via credit card”. And small amount by “paypal” ,below 500 USD.“ alibaba Trade Assurance” you’re covered for: If we does not meet the requirements in your contract, Alibaba.com will refund your covered amount.
5) How about the customs declaration amount ? who pay the custom duty ?
In principle, we are according to the actual payment amount to making a declaration, if you need change, please indicate the amount of customs declaration, we will consider the circumstances for making a declaration.
If refuse to pay import duties and cause the product return. All liability to the buyer. all expenses for goods returned need paid by the buyer, including return freight and tariffs.we appreciate if the buyer can confirm receiving the goods and give good feedback,within 3 days .our customer service dept will add you into our VIP list and get a discount in future order.
Thank you very much !
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