If you are asking about NDA, the following are the visual standards needed

Visual Standards

The distance vision (corrected) should be 6/6 in better eye (6/9 in worse eye). Myopia should not be more than 2.5 D and hypermetropia not more than 3.5 D including Astigmatism. Internal examination of the eye will be done by means of opthalmoscope to rule out any disease of the eye. A candidate should have good binocular vision.

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