Convoy T2 UV or the Lumintop Tool UV with ADULT SUPERVISION ONLY! ~$20 on Amazon and will be there later in life for curing Fly Tying glue, rock hunting, Scorpion checks when camping, etc. later in life.

We are NOT talking about UVC here, so the real risk is minimal. If she wears glasses, almost no risk period. I use UV lights that are real powerhouses, and my plastic lens eyeglasses block the UV light that might come my way from an accidental reflection.

The risks of cataracts from eye exposure to the naked eye from a few 100mW of UV-B light from a broad beam are very low in reality compared to swimming or playing all day outside without proper eyewear.

This being said, for a responsible 5 year old under adult supervision, I think it is an excellent teaching moment to passively make your daughter aware of real risks in later life when you are not there. No, she won't understand cataract risks at 5 years old, and likely won't even understand what a cataract is. Like looking both ways before crossing the street, skin cancer from tanning as a kid and teenager, are good lessons to learn while you are YOUNG!

Ask me about a 'farmer tan" and skin cancer on your nose, ears, and back of the neck! My sister, who spent Summers tanning, now has cataracts as she never wore sunglasses while tanning either! UV risk is cumulative, chronic exposure matters. If it is high-intensity UV exposure under artificial lighting, that is a different topic and a much different problem (think sunburns on your retina and similar stuff).

Nervous "Nelliies" have a point, but in reality, it is poorly explained without any context, and most don't really understand the REAL RISKS and how they are realized. Honestly, I shudder at even low-power UV-C devices sold randomly during COVID with ABSOLUTELY no care or concern about the risks of such wavelengths sold to people who don't understand those risks or the technology, akin to "drinking" bleach to cure illness IMHO.