For checking steel girder alignment, what tool commonly used poses a risk for eye injuries?

Using lasers for checking steel girder alignment presents a notable risk for eye injuries due to the concentrated beam of light that can cause damage to the retina. When lasers are improperly used or their beams are aimed towards the eyes, they can result in permanent vision impairment. It is essential for workers to wear appropriate eye protection when operating laser tools to mitigate this risk.

In contrast, while hammers, saws, and screwdrivers have their own safety concerns, they typically do not pose direct risks to the eyes in the same manner that lasers do. Hammers can cause injuries if they slip or glance off an object, saws can create flying debris, and screwdrivers may lead to puncture wounds, but none of these tools focus a powerful beam of light that can harm the eyes as lasers do. This makes the precautions surrounding laser use particularly critical in workplace settings where precision and safety are paramount.