Confused as to why I have been prescribed prism in glasses
I'm 28 years old and I recently had an eye exam and found that my new prescription contains prism 1.00 IN on my right eye. I have never had this before. My eyesight is not bad at all and only really need glasses for computer/TV/driving, I think I see quite clearly. I have been reading up on the internet and prism are used to correct double vision, I don't have that. The optician also stated that I need 3 prism's in my right eye to correct it but he was only going to prescribed one so as my eyes would also do some work. Also he tested my right eye with a laser beam going through a white dot but did not do the same test with the left. I am completely confused as to why I need a prism and why wasn't my left eye tested as well?