okay so do you wanna know something cool right
In Yestaria*, you'll see people with no eyes, or depth perception problems wearing these lenses:
These are called Crystal Sensor Replacement Lenses, or CSR Lenses for short. Depending on the person they are tailored to, they have different uses - but the underlying purpose of CSR Lenses is to provide another layer of sight dimension that the user may not have.
They can be used in the form of glasses (see Fig. 1) or contact lenses (see Fig. 2).
The glasses in Figure 1 are to give sight to those who do not have it; if their sensor pores are clogged, they put the glasses on, and it projects the image into their brain using spikes that pierce the head, which are on the inside of the glasses arms.
The contact lens in Figure 2 is to give one-eyed users a perception of depth. Inside of the lens is a special material that warps the world to create some sort of depth. The technology is imperfect, but it works well enough to be used by a few internethumans*.
CSR lenses are concave surfaces of glass and a special crystalline substance found in the Nexus Fields*. They date back to the 1700s, or circa 250 BC*, where paperclips were created from the poles*, and chose a googly-eye-like CSR lens for their eyes. The eyes of the pioneer Thomas, the private engineer of Torus the Warmonger*, were studied by doorpeople in the Invasion of the War*. They then sent intelligence back to Yestaria.
Many sets go upwards of 4,500 Yestarian Dollars (YD)*, and are made mostly by the conglomerate run by the Google HELA. The budget sets, going for at least 2,000 YD, often experience troubles with interpreting complex objects. As a result, many blind internethumans have experienced an injury from object misinteraction.
*glossary post bc I know it might be confusing lol