Seymour's draft card

I noticed on Seymour Rabinowitz's draft registration that he gives his real birth date but changes the year to make himself 28 instead of 30. Was that intentional to get into the war? However, the card also notes that he is blind in one eye. Was that to get out of the war? This is our future truant officer, now an unemployed bookkeeper.

It would be worth reading up on the draft of 1917-18 to get a sense of how popular the war was. Were men of all ages required to register? It's interesting that Julius registered at age 41.