Can wearing contacts cause ptosis in one eye? (Photo)

Contact lens wear can cause ptosis but there are many other causes as well. Best to see an oculoplastic surgeon for evaluation and consideration of eyelid ptosis surgery.

You definitely have left upper eyelid ptosis. Contact lens wear is a definite risk factor for ptosis, especially if you are relatively young. Unless your trauma was directly to the eye, it is unlikely that concussion type trauma would be a risk factor here.
You should seek a consultation with an Oculofacial plastic surgeons. They are excellent ones in the state of Wisconsin. ASOPRS.org is an excellent resource for finding one.
Good luck

Yes, this is ptosis affecting the left upper eyelid, you may have latent ptosis on the right side and that can be assessed with a detailed in person assessment. This is corrected with surgery and I see no reason why you should not have this evaluated and dealt with now. I strongly recommend seeing a fellowship trained oculofacial surgeon. That is a board certified ophthalmologist who has done an approved fellowship in oculofacial fellowship. The American Society for Ophthalmic Plastic and Reconstructive Surgery maintains a regional directory on their website that can help you find a highly qualified surgeon close to home.

You definitely have ptosis. I doubt if it is due to the contact lens wear. Though theoretically possible, it is also uncommon for trauma to cause this. If you are going to have a problem from the concussion, it is usually a nerve to one of the muscles that control the eyeball, not the eyelid. As far as concern beyond aesthetics, the biggest problem it causes is headaches as you are muscles are trying asymmetrically to keep your eye lids open equally. For that reason, I would suggest that you see someone experienced in treating ptosis.