Here’s the corrected HTML code for the article:

Virtual reality (VR) technology has come a long way since its inception, but there are still several engineering obstacles that need to be overcome to achieve truly immersive and realistic experiences. Here are some of the biggest challenges:

1. Field of view limitations

One of the main challenges with VR is the limited field of view (FOV) provided by current devices. While 90-degree FOV is becoming more common, it’s still not enough to provide a fully immersive experience. Higher FOVs are technically possible, but they require more advanced and expensive hardware, which limits their accessibility.

2. High latency

Latency refers to the delay between the user’s actions in real life and the response of the VR system. A low latency is essential for a seamless and immersive experience. However, achieving high latency requires advanced hardware and software optimizations, which can be difficult to implement.

3. Motion sickness

Motion sickness is a common problem with VR, especially when the user is moving in real life. The disconnect between what the user sees in the virtual world and their own physical movement can cause nausea and dizziness. To overcome this obstacle, engineers need to develop more advanced tracking systems and algorithms that can better predict and compensate for the user’s movements.

4. Eye strain and fatigue

Eye strain and fatigue are also common problems with VR, especially when used for extended periods of time. The constant focus required to track virtual objects can cause eye discomfort and headaches. Engineers need to develop more comfortable and ergonomic designs for VR devices and controllers, as well as optimize the software to reduce the amount of strain on the user’s eyes.

5. Cost and accessibility

Finally, one of the biggest obstacles to widespread adoption of VR is cost and accessibility. High-end VR systems can be very expensive, which limits their availability to the average consumer. Additionally, VR experiences still require powerful computers or gaming consoles, which not everyone has access to. Engineers need to develop more affordable and accessible hardware options, as well as optimize software for mobile devices and lower-end hardware.

In conclusion, while virtual reality technology has made significant strides in recent years, there are still several engineering obstacles that need to be overcome to achieve truly immersive and realistic experiences. By addressing these challenges, engineers can continue to push the boundaries of what’s possible with VR and create new and exciting applications for this rapidly evolving technology.