I'd go back and be a little more insistent. I don't know about where you live, but they have a specialist eye clinic at the Royal Berkshire Hospital in Reading which I have found to be very good; maybe there's similar provision where you are.
I had an incident when my infant son turned and stuck his finger in my eye while I was bathing him (and you know how sharp those infant fingernails are!). A trip to A&E that evening yielded some eye drops to relieve the pain and a recommendation to visit the eye clinic the next day. Visited the eye clinic and was added to the end of their clinic appointment session. Was diagnosed with and treated for corneal abrasion. Took a long time to heal, but the NHS initial response and treatment was superb. A specialist eye clinic will investigate in greater detail, like whether the eye is now sensitive to light, does the eyelid automatically close, etc.