Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Well built but bad optics

I am a 51 year old controls engineer needing a pair of safety glasses for using my laptop PC in an industrial environment. These Dewalt glasses are well built and comfortable but the magnification areas of the lenses are in the wrong location for my liking. They are situated too low and not large enough. They would be ok if all you were doing were reading a book, but when working in an industrial control cabinet or on a laptop, they are unsuitable. For example, the keyboard is in the magnification area but the screen is not. I will instead look for a pair that magnifies over the entire lens. The protective sleeve that comes with these glasses works well.October 2011 update: I have purchased a pair of VS Eyewear, clip-on 0.75x full-lens magnifiers to clip-on to these Dewalt safety glasses. A bit bulky, but it works. I now get the magnification that I need across the entire lens of the safety glasses.