According to the Railway Recruitment Board (RRB) norms, candidates with a visual impairment of -3.00 diopters or worse in one eye are not eligible for certain posts, including Station Master.

However, there's a possibility you might still be eligible under certain conditions:

- Corrected Vision: If your vision is corrected to 6/9 in the better eye and 6/12 in the worse eye with glasses, you might be eligible.

- Medical Standards: You'll need to meet the medical standards prescribed for the post of Station Master.

To confirm your eligibility, I recommend:

1. Checking the RRB NTPC Notification: Review the official notification for the RRB NTPC eligibility criteria and medical standards.

2. Consulting an Eye Specialist: Get a professional opinion from an eye specialist to determine the extent of your visual impairment and whether it can be corrected to meet the eligibility criteria.

3. Contacting RRB Authorities: Reach out to the RRB authorities or a railway recruitment cell to clarify any doubts and seek guidance on your eligibility.

Remember, it's essential to ensure you meet the eligibility criteria before applying for the exam.