Hello Himanshee

A male candidate should be able to read 6/6 in a distant vision chart with each eye with or without glasses (For Navy and Air Force without glasses only), Myopia should not be more than 3.5D and hypermetropia not more than 3.5D including Astigmatism.  For women candidates the minimum acceptable visual acuity are distant vision (corrected) better eye 6/6, worse 6/18, Myopia of not more than minus 5.5 D including astigmatism. Manifest hypermetropia of not more than plus 3.5 D including astigmatism

Visual Standards for Navy

->Uncorrected without glass 6/12

-> Corrected with glass 6/6

-> Limits of Myopia -3.5

-> Limits of Hypermetropia +2.5

-> Binocular vision III

Source: (A blog)