How somebody could become perfectly invisible by the use of technology without being blind because of the deviation of photons. These past years, a lot of meta-materials or other technologies have shown to be able to bend light and being imperfectly invisbles, for example :
In 2019, a paper-thin material that bend utraviolet and infrared light to make only the background of a man visible and not himself was made. It is achieved by the use of lenticular lenses in the material. It is alas rigid. Source : https://globalnews.ca/news/6110652/bc-company-cloak-of-invisibility/
In 2011, at the Technical University of Denmark a carpet cloak made of dielectric materials was developed.
It consist of a « semiconductor manufacturing techniques that involve patterning the top silicon layer of a silicon on insulator (SOI) wafer with nanogratings of an appropriate size and structure ». The design can be tweaked by changing the orientation of the layers, so the wavelength of light affected.
According to the scientists, it is a method easier to do than other and can produce a « carpet » large enough to cover entire vehicles. The more layers is added to the metamaterial, the more efficient it is, for me this is a form of drawback in term of weight.
Source : https://newatlas.com/invisibility-cloak-metamaterials-size/18454/
In 2016, scientists at the Iowa State University unveiled their meta-skin cloaking project. For now it only make you invisible against radar detection but they are confident about making it bend ultraviolet and infrared light. Source : https://newatlas.com/meta-skin-invisibility-cloak/42205/
As you see these technologies shows a lot of promises, starting just by the fact that they do not require energy to function but are still in development stage and with specific draw backs. Despite this, by take one of those examples a base, how true invisibility without becoming blind by the deviation of photons could be achieved ?