Your astigmatism affects your night vision more so than your day vision. When your eyes are exposed to bright lights, your pupils decrease in size, creating a pin hole effect. This means more light is directed to the back of the eye more accurately. In low light, the pupils are increased in size, and the light rays are more indirect to the back of the eye, creating a fuzzier image.
You need to wear glasses or contacts at all times to be comfortable with your vision. Corrective eye surgery can be done, but usually requires visual stability for at least 2 years. Also, not 100% accurate on correcting your astigmatism, despite what some doctors may say.
I've lived with glasses most of my life, and like them. I also wear contacts on occasion. My prescription is : OD(right eye) -3.50 -2.25 x165, and OS(left) -3.25 -2.50 x120. This is much stronger than yours.
When you purchase glasses, make sure you have someone you trust fashion judgement with help you choose, else you may not like them, and not wear them as much. Also, choose a durable pair, not those $99.00 cheap pairs. Your going into the military, and you need these to last. Get contacts if you can, and wear them occassionally. Listen to your doctors recommendations on the wear of contacts. He knows your eyes better than anyone else.
Good luck.
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astigmatism 
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