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If it is a strict investigation, you can't take it invisibly, so you can only find something called an OK mirror. This thing oppresses your eyes more seriously and can only be used for a short time. If you take it for two days, your vision can be kept at 5.0 for about one day after taking it off, but you are unlikely to return to the original appearance after this day, but if you take it for a long time, it may be very long, so you can't take more, and its price is very cheap.

Forget the operation, you don't know much about its harm, and you can't do it in the army. After you cut off the cornea, the cornea on the surface of the eyeball will be very thin, so you can do intense and strenuous exercise, because your eyeball may pop out when it is impacted, not to mention scaring you, diving or something.

You should consider this plan first. If you think it's expensive, you can find another way.