hello aspirant,

The Vision standard for Army candidates is mentioned below :

Distance vision ( corrected) - better eye: 6/6

Worse eye: 6/9

Myopia not more than -2.5d including astigmatism and Manifest.

Hypermetropia not more than +3.5d including astigmatism.

binocular vision- III

- For Air Force:

Candidates who habitually wear spectacles are not eligible for Air force.

Minimum distant vision: 6/6 in one eye and 6/9 in other.  ( correctable to 6/6,but only for hyoermetropia)

Near vision must be N-5 in each eye.

- For Indian Navy :

Corrected with glass : 6/6

Uncorrected without glass: 6/12

Limit of Myopia: -1.5

Limit of Hypermetropia- +1.5

So, if you have a weak eyesight beyojnd this vision limits, then you cannot join the Indian Air force. however, you can correct your eye vision with help of some good doctor.

Further, to know more about the Indian Air Force, eligibility criteria, admissions, etc - you can follow the below mentioned link to know more : https://competition.careers360.com/articles/how-join-indian-air-force

\I hope that this will help.