From page 3 of this article -
https://ohsonline.com/Articles/2007/02/Preventing-Eye-Injuries-When-Welding.aspx?Page=3
"Some guidelines and safety warnings for welding suggest workers should not wear contact lenses, even though there does not appear to be any research that would support such a recommendation. In fact, the National Safety Council, the American Welding Society, and the FDA all acknowledge that wearing contact lenses while welding is safe and even can provide UV protection. The only caveat is that contact lenses should not be used as eye protection in place of safety glasses or goggles."
Also, from thefabricator.com - "Regarding contact lenses, OSHA, the American Welding Society (AWS), the U.S. Food and Drug Administration (FDA), and the National Safety Council (NSC) all acknowledge that wearing contacts while welding is safe in many cases, unless fumes, excessive particles, or other regulations bar their use. Contact lenses, however, don't serve a safety function; welders should wear goggles or glasses with contact lenses to ensure proper eye protection."
I'm nearsighted and wasn't allowed to use contacts for the last 35 years before retirement, but that was because of occasional chemical fumes - chlorine, for example, will mix with fluids in the eye and you end up with hydrochloric acid between eye and contact.
Been welding off and on for the past 50 years, and had more problems with grinding getting stuff in my eyes than anything else.
Sounds like you'll be fine, but I second the use of safety goggles, especially when grinding/wire brushing, etc... Steve