[seosoftseo]

Insha'Allah someone can produce the actual hadith I'm talking about here.

I remember reading a hadith once, which said that the Prophet said something to the effect that what may be detestable to one person may be pleasurable to another. Similarly, what may be detestable to the 2nd person may be pleasurable to the first person.

The "norm" may be that "old women" won't have an 'effect' on anyone so it's OK whether they cover themselves with hijab or not. However, what about the one who derives pleasure out of fantasizing about "old women"? What if someone like that happens to see an uncovered old woman and ends up committing sin(s)? It's not a matter of "well that's very rare", because it is not. There are all types of people out there, who derive pleasure from different ages (young to really old), different body types, different [insert characteristic], etc... discussing the details of which is not appropriate, but you get the idea.

Hence, even if Islam is a bit lenient when it comes to aged women wearing hijab (IF... I don't know, I'm not a scholar), it is still a good idea for them to cover up, as the same reasons which apply to younger females for covering themselves up, apply to older females also.

Allah knows best.