The difference between a mouse with an optical sensor and a laser mouse is the type of the sensor used. The laser mouse works with a laser diode and an optical sensor uses a light emitting diode. The different techniques offer advantages and disadvantages.
Optical sensors do not work on every surface, for example if it is too smooth. On the other hand, the LEDs do not react sensitively to rough surfaces. Laser mouses, on the other hand, work on any surface, but small elevations in the mouse pad affect the precision. In addition, the mouse speed cannot be turned off with laser mice because the technology does not allow this. This is a particular problem for professional e-athletes. For gaming, it would be optimal if a certain mouse movement were always translated into the same movement on the screen and not dependent on the speed. Only optical mouses can do that.
Other technical parameters you should pay attention to are:
DPI is an English abbreviation and stands for "dots per inch". DPI is the unit of measurement for the sensitivity of the mouse, the higher the DPI value, the higher the sensitivity of the mouse. Many manufacturers advertise with very high DPI values, but these are never used in practice. For the average user, a DPI value between 1,600 and 800 DPI feels good.
With or without cable?
Wireless mice have one obvious advantage: the annoying cable no longer disturbs when you are moving the mouse. And there's no risk of a cable breaking. However, the added comfort is accompanied by a small reduction in the performance. The response time of cordless mice is higher because the mouse first has to send the signal to the receiver. The latency time varies and depends on the quality of the signal and possible interference from other wireless connections. If your mouse should have a cable depends on how you use it. A cordless mouse would not be suitable for gaming, but it is a convenient alternative in the home office.
Many mouses have additional buttons on which the user can place various functions. This also includes shortcuts for programs or macros. This means that the user no longer has to press long key combinations and can perform the desired action by pressing just one key. A disadvantage of configurable keys is that they often interfere with the design and sometimes with ergonomics. If and how many configurable keys you need also depends on how you use the mouse.
The polling rate indicates how often the mouse sends signals to the PC. If the polling rate is 500 Hertz, the mouse sends 500 signals per second to the PC. The polling rate is especially interesting for gamers and should be at least 1000 Hertz in the gaming range. The polling rate of the keyboard should not be less than 1000 Hertz.
The ergonomics of the mouse
The ergonomics of the mouse influences the performance and health. If the mouse shape does not fit to the user's application or grip, this could have health consequences. This includes muscle tension and pain. Tension in the shoulder and neck muscles is often the result of an inappropriate mouse and the wrong posture when working with the computer. There are three different grip types.
Palm-Grip: The Palm-Grip is most commonly used. The hand encloses the mouse, which is why the Palm-Grip ("palm of the hand") is also called Palm-Grip. Since the hand rests completely on the mouse, it is controlled with the forearm and wrist. Especially large, heavy mice are suitable for this type of grip. In smaller models, part of the palm of the hand would slow down the movements.
Claw-Grip: The user claws his hand together so that only the palm and fingertips are touching the mouse. The fingers, on the other hand, do not touch the mouse. As a result, the fingertips touch the mouse keys almost vertically. The Claw-Grip is only rarely practiced in its pure form, as it quickly leads to tension. With this type of grip, the mouse is usually moved from the wrist. Therefore small, symmetrical devices are especially suitable for users with the Claw-Grip.
Finger-Grip: In this type, the hand floats over the mouse and only the fingers touch the mouse buttons. The mouse movement is coming from the finger joints, which makes very precise, slow movements possible. Most gamers use a mixture of claw and finger grip. Very small, light and symmetrical mouses are suitable for the finger grip.
Ergonomic: Ergonomic devices are used to prevent typical strain on the body when working with a PC. Ergonomic mice are often shaped so that the wrist is turned slightly outwards. This means that less pressure is put on the arteries in the arm and on the nerves. The blood flow is not disturbed and the nerves are not squeezed.