= Level (optical instrument)
{wiki=Level_(optical_instrument)}
A level, in the context of optical instruments, is a tool used to establish a horizontal or vertical reference line. It is essential in construction, surveying, and engineering to ensure that structures are built accurately and that measurements are precise. There are several types of optical levels, but they generally include the following components: 1. **Optical Alignment**: An optical level typically has a telescope with crosshairs or reticles, which allows the user to see the target point clearly.
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