What can happen if an NVG is not properly calibrated?

If a Night Vision Goggle (NVG) is not properly calibrated, misalignment can occur, resulting in poor image quality. Proper calibration is crucial to ensuring that the components of the NVG, such as the optics and the image intensifier tube, are aligned correctly. When these components are misaligned, the viewer may experience blurred images, ghosting, or uneven brightness, making it difficult to discern details in low-light conditions.

Calibration ensures that the device is optimized for the user's vision and the specific environmental conditions. Without this adjustment, not only is image quality compromised, but it can also lead to eye strain, difficulty in target identification, and an overall reduction in situational awareness. Therefore, proper calibration is essential to maintain the effectiveness of NVGs in their intended application.