I have the same Logitech wireless mouse model Cn231 made in China, had it for eight years no trouble with the hand that holds the Mouse.
Found this:
Summary:
Email warns that radiation emitted by an optical computer mouse can cause cancer and damage hand tissue.
Status:
False
Example:(Submitted July 2007)
Just in case, please be careful.
Subject: Optical mouse can cause cancer
The convinience of using optical mouse eventually coz dangerous side effect. After Three years from the first launch by microsoft, have been found thousand of cases - hands tissue coz by mouse radiation.
Optical Mouse works by release Electromagnetic high frequency to the lower surface under it. This frequency much more higher than the frequency use for handphone.
As it has been known that human hand and wrist contains lot of important nerve connected to brain.
According to WHO, the radiation from Optical Mouse is 5 times stonger than using handphone.
These radiation is even worse for those product with lower quality ( non branded mouse ), since they use weaker shield to protect customer wrist. WHO, GreenPeace, and CNN have stopped the usage of Optical mouse in their whole office.
Meanwhile Microsoft and IBM have allocate 2 billion of US Dollar, in joint venture to make a safer pointing device.
Big Hardware Industries in China and Taiwan are trying to hide all fact related to this things. While in the market, most of optical mouse sold old were coming from their product.
To avoid this, try to reduce using mouse. learn how to use hot key ( i.e. Ctrl-V, CTRL-C for paste and copy ) Use back your old model of mouse ( with the tracking ball).
Commentary:
According to this "warning" email, using an optical mouse can have dangerous side effects and cause cancer due to the amount of radiation produced by the devices.
The message claims that there have been thousands of cases of hand tissue damage attributed to optical mouse radiation.
However, the claims in the message are fundamentally flawed. Optical mice do not emit radiation that could cause cancer or damage tissue. An
optical mouse has a tiny built-in camera that takes thousands of photographs per second. A red light emitting diode (LED) bounces light off the underlying surface to a sensor that analyzes the images and sends coordinates to the computer. The cursor is moved on the screen based on the coordinates received.
Thus, the core component of an optical mouse is a simple
LED. Nowadays, LEDs are ubiquitous and are used in dozens of electronic devices including indicator lights in household appliances, digital clocks, remote controls, traffic lights, brake lights, television backlighting, Christmas lights, watches and fiber optics. Many of us spend our lives virtually surrounded by these tiny lights. Yet, in spite of the fact that we are exposed to LEDs almost constantly, there is no reliable information whatsoever that suggests that LED "radiation" can cause cancer or tissue damage during normal use. In fact, scientists have discovered that LEDs may actually
aid healing and have other positive health effects.