Ask cheval-energy.com: do you have something that helps prevent any more ulcers in a horse's eye my mare almost went blind do to one we didn't see but the vet gladly came a show and gave her something . What supplements are good
In order to answer you correctly, I would need more information ... Is it ulcers or uveitis? Indeed, it is rare that an ulcer leads to blindness and is often painful so visible to the owner. On the other hand, uveitis can develop at low noise and lead to loss of vision in the medium and long term.
In absolute terms, there is no miracle preventive solution other than monitoring, regular checking by your veterinarian and protection by a minimum fly mask or the Equivet eye protection mask in some cases : https://www.cheval-energy.com/fr/materiel-specifique-cheval/672-masque-protege-oeil-equivet-kruuse.html