I Can see near or far without blurriness or vision disturbances. No headaches & my eyes don't feel stressed. They have spring hinges & fit well. I gave them a chance because they were a new product without reviews. It was worth it. I highly recommend these. I use all the colors. (I read that someone else had a problem seeing but used 3.00.) Maybe they are too strong for them. I think if you order the strength you need you will be happy.I was skeptical but I am soooò glad I purchased these glasses!I can see perfectly and very sturdy. Nice colors too!I returned these. The lenses weren’t comfortable to look through; they were too low quality to use.How do I know that I ordered the right number 300 but I see a little blurryThis is the first time I used this type of glasses .Any advice, please ??For the price these glasses are good!