degree around 175 for each eye...age 40
hmm..
I assumed that u have presbyopia since u are considering for monovision. imho, If u are having difficulty in focusing near object, it is going to be worse after the lasik.
The monovision lasik will leave one of your eye with residue degree of 50 to 75degree.
I am no doc, but think about this.
Will monovision gonna help u in the longer term? Cos you are 40 yrs old now, and will the presbyopia worsen further?
Can u get used to 'unbalanced' vision? Maybe try putting on contact lens to mimic the experience of monovision.
Is it worth to put your eyes under the knife to correct 175 or less degree? Considering that u might still need reading glasses after lasik, not to mention all the side effects that the lasik bring.
My 2 cents.