My son is 5 years old (Going to be 6 next month). I noticed that when he tried to read street names at a distance, he said those are blurred. We went for an eye checkup.

We initially went for an optometrist for checkup. The prescription given is
     Sph     Cyl     Axis
OD     -1.25           
OS     -1.25     -0.25     100
I noticed that my son didn’t read the last line with small letters even with the corrective lens. (The doctor told that the computer showed the power as -1.75 but the prescription is enough)

We went to a pediatric optometrist for second opinion. The prescription given is

     Sph     Cyl     Axis
OD     -1.75     DS     
OS     -1.75     DS     

I have the following questions –

1.     I’m not sure why the prescription is different and which of these ones to follow? Can you please suggest me?
2.     If my son wears the lens with less power (prescription from first doctor), will it be better for his eyes in the long run? I read in some of the internet sites that having the glass with more power is bad for the eyes as the brain will accustom to that power and increase from there. Is it true?
3.     Does he needs to wear glasses all the time? Does he need to wear it while he is reading or writing (he never complained while reading, writing or playing in ipad)?
4.     Will wearing glasses all the time – improves or worsens one’s vision?
5.     I put glasses when I was 10 (the power was -1.00 at that time and it got increased till -2.25 and it stopped and I’m in that same power for last 15 years). I’m worried that my sons starts at a very young age with more power. Does he have a higher risk for high myopia since he is having power from young age?
6.     Are there any way to make sure that his power is not increasing?