The Eligibility Criteria For NDA is given below : 

Nationality:

• Candidate must be a cititzen of India, a subject of Nepal, a subject of Bhutan

Age Limits: 

• Only unmarried male candidates can apply for the exam 
• NDA 1 - Students must have been born between 2nd July 1999 to 1st July 2002
• NDA 2 - Students must have been born between 2nd January 2000 to 1st July 2003

Qualification Criteria: 

• For army wing candidates must have passed 10+2 or equivalent exam organised by state education board or university
• For Air Force and Naval of NDA - student should have cleared 12+ or equivalent exam with Physics & Mathematics subjects

Physical Standards:

• Students should be medically fit as per the norms set by National Defence Academy and Naval Academy Examination.
• Candidates shoould go through the medical examination organised by the Military Hospital after being recommended at the SSB. 

The Eligibility for Visual is :

• The distance vision should be 6/6 in the better eye 6/9 in the worse eye. Myopia should not be more than 2.5 D and hypermetropiya not more than 3.5 D. 
• The candidate should have good binocular vision. 
• The color vision standard will be CP-III for Army.
• A candidate should be able to recognise red and green color. 
• Candidates have gone laser surgery for correcction of refractive error are also not acceptable to defence services. 

All The Best !