For the National Defence Academy (NDA) in India, the eligibility criteria for vision are quite specific. Generally, the NDA requires candidates to have good eyesight, with permissible limits for myopia (nearsightedness) and hyperopia (farsightedness) being quite strict.

Typically, the vision standards are:

• Myopia : Up to -2.5D (diopters) is usually acceptable.
• Hyperopia : Generally, up to +1.5D is permissible.

Given your prescription of -2D in one eye and -2.25D in the other, you are just within the general limit for myopia. However, since vision standards can sometimes be subject to changes or interpretations, it’s a good idea to check the most current and specific guidelines or consult with an NDA admissions office or an ophthalmologist who specializes in military examinations to get a definitive answer.