One day I went to see a movie and felt like my head was going to explode from a massive headache. Went to urgent care at my medical group, where I was diagnosed with post-concussion syndrome. Had mostly overlooked the fact that I had hit my head a day or two before, not even that badly. As part of the exam they had me read an eye chart. Normally my vision is great, but this day I could barely read the chart. Next thing I know they are sending me emergently over to Mass Eye and Ear to see an ophthalmologist. (And thankfully DD was with me because my vision was so bad they didn’t want me to drive.) Then a neurologist. (That exam was scary because I couldn’t pass the cognitive part, ie remembering a list of items I’d said five minutes before.) That doctor explained that these symptoms could take quite a while to resolve, and warned me that, whatever I do, don’t get another head injury on top of the one I already had, as a concussion on top of a concussion can cause damage to the brain, so I had to be careful walking and showering all that. What a pain! My symptoms lasted for a couple of months. After that I could read the eye chart again, and pass the cognitive exam, etc. I was really surprised how much a little blow to the head had affected me so intensely.
Long way of saying, sure, if you had a hit to the head, it doesn’t hurt to have an eye exam, but like others have said, if you’re not having symptoms, that’s a good sign. It sounds like you had quite a blow, so be careful. If you start having symptoms you should be seen again. Take it easy for a while, give your brain time to rest and heal. A hit to the head causes the brain to become bruised, and just like any other bruise, it takes time to heal. Hope this helps.