Does Anyone know if it can be diagnosed with a CT?

Hello All, I've been experiencing eye pain, blurred vision and headaches. My eyes were checked and the dr. said my vision is almost perfect so he does not think the pain has anything to do with my eyes. He is sending me to have a CT scan. Does anyone know if an Aneurysm can be found on a ct scan without contrast? I had a ct scan about 5 yrs ago without contrast and everything came back fine however he is sending me to have another without contrast. Any suggestions or info will be appreciated. Thank You so much. p.s I am so scared hearing and reading about people collapsing due to an undiagnosed aneurysm.