What Causes Blurred Vision After A Neck Injury?

i fell backwards on an incline when i landed i landed feet up in the air and came down on my neck. the er doctor did a cat scan nothing broken. she told me too follow up with a ortho dr. but they sent me too a comp doc from work and he said it was just musle bruise and gave me a neck brace & flexoral & napriosine. i was off work for a week. yesterday i was sent back on light duty even though i told the dr my neck feels ok when i wake up but then 1-2hrs later the pain is there and my vision gets blurry he said it was normal? is it normal or do think i have something else wrong? today the pain is now in both sides of my neck where it started souly on my left only? please help?