I have gone for eye checkup and my power came out to be 2.5 for both the eyes .. I have problem in seeing distant objects but I can see near objects clearly .. That's why I gone for eye test .. But when I am wearing my new glasses I am able to see distant objects clearly but when I am seeing nearby objects like my phone , book , or ground I am able to see them but they are slightly blur , objects are feeling slightly  tilted means I am feeling good without my glasses but with glasses  I am feeling uncomfortable like a slight headache , slight pain behind my neck and little bit nausea also .. why is it so ?