Since laptops are so convenient and portable, many people work in locations that are not set up for long-term ergonomic comfort (for example, dining room tables or coffeeshop counters, e.g. Figure 1).
Since these locations were never designed for laptop use, they are typically set up in such a way that the laptop keyboard and screen are way too low, and you often see people hunching over their laptops in ridiculous fashion (Figure 2).
Ideally, people imagine that they would sit up straight, as shown in Figure 3. But that is incompatible with the position of the computer screen.
Luckily, the fix is simple: a modified version of belay glasses, a type of prism glasses used in rock climbing that were allow wearers to look up without craning their necks.
Except in this case, the prism glasses will look down at the laptop screen, rather than up, as illustrated in Figure 4.
Since prism-based belaying glasses already exist (surprisingly, only commercially available after 2007!), laptop prism glasses are probably not totally infeasible.
It would also be possible to use a VR headset to set up something like this, but at that point you might as well just set up a proper work space.
PROS: Improve your posture!
CONS: The “sweet spot” for seeing the screen is probably extremely narrow, so any movement of the wearer’s head may move the laptop screen out of the user’s view. Additionally, even the slightest imperfections in the prism would probably make text very difficult to read.