Yesterday I saw my very beatiful ayes doctor,and we had a long conversation about
viagra.
I told her that the last time I saw my surgeon,and I told him that every time I used viagra I saw
this very cool blueish color 
.At that point ,he told me not to use viagra and gave me cialis.
I asked her to explained to me in details why he changed viagra. 
this is the answer. she said my doctor did the right thing,because when you see that nice bluish color
is is do to the fact,that inside the ayes the optic nerve gets weak and with continue used of the medication will produced permanat damage to your ayes.
she asked me to tell you guys if you see that cool blueish color do not take viagra. 