Hi Pratyay, following is the specification for vision for candidates seeking admission to the BTech programme is:

It actually depends not on the power of your glasses, but the eyesight. It says

- Candidates joining B.Tech should have

1. unaided sight of 6/12 in both eyes

OR

2. unaided sight of 6/9 in the better eye and 6/18 in the other eye.

And, in the case of the power, you won't face a problem as in the case of NDA, i remeber, if i'm not wrong, the range was opto -2.5 or -5. So, just check whether your eyesight is as per the above given criteria or not.

Refer these for more details -

http://www.imu.edu.in/images/CET2017/EligibilityCET%20May%202017.pdf

https://engineering.careers360.com/articles/imu-cet