The Ethereum network was really forced to assume that role: the tokens in the network shot up like mushrooms. Suddenly, everyone wanted to issue the so-called ERC-20 token. Since the launch of the network, more than 200,000 Tokens have been issued on the Ethereum network according to EtherScan.

ERC-20 is a technical standard for implementing tokens in the Ethereum chain. Almost all the coins or tokens issued on this platform belong to this category. The most important example is the ether. That is the fuel of the Ethereum network and it is also an ERC-20 token. With ether, it pays to make transactions, but also to execute smart contracts, for example.

These tokens are issued based on a smart contract. These contracts do not have to be ‘smart’ or super practical, therefore, it is a slightly unfortunate name. However, these smart contracts ensure that the network and tokens must comply with certain rules. Therefore, you can program your tokens in a certain way and give it certain properties.

In 2017, the initial coin supply trend began. Everything and everyone had to have their own record. Often that was only possible with ETH. Which resulted in prices well above $ 1,000 per ether. Current hodlers can only dream of that. Millions could be collected. And if you could make a good marketing talk, you could charge wonderfully. Because investors were ready to push their ETH earned so hard to another new company.

Billions in investments in projects, most of which have never added anything to the crypto space. On the other hand, there are some outliers. If you look at the top 100, most remain an ERC-20 token. The largest token, after ETH, is currently Binance Coin (BNB). But that currency will eventually move to its own chain. But also other currencies that are popular this year, such as Chainlink (LINK) and Basic Attention Token (BAT) have been issued on the Ethereum network.

Do not press any button like on the cameras. In this case, the lens detects electrooculographic signals (the intensity of the movement of the eyes and eyelids that allow to measure the state of the muscles). There is an electric field in the tissues surrounding the human eye and a measurable potential difference between the front and the back of the eye, so when electrodes are placed on the skin around the eye, that difference can be measured when the eye does it move. “The world of contactology is changing a lot. For example, we have contact lenses with sensors that can measure both intraocular pressure and sugar levels, ”says Dr. Jesús Merayo, director of the University Institute of the Fernández-Vega Ophthalmological Foundation.

But this system, which is still in preliminary phase, is controlled by manual or pre-designed programs. Normally, the eye receives ambient light stimuli. The light passes through the transparent media and the lens of the eye forms an inverted image in the retina. That is where specialized cells transform the image into nerve impulses. With this invention, electrooculography signals generated by eye movements (up, down or from right to left, and vice versa) are used, which help control movement and focal length. “Smart lenses can be the future for visual prostheses, adjustable glasses and remote robotics,” says the report.