Four eyes

This is a tiny spider, about 3mm across the head. I think it's  a Garden Jumping Spider, maybe Opisthoncus parcedentatus which is described on this webpage. This one took a wrong turning in the garden and ended up inside the house. The grey/blue background is our internal stairway balustrade which is made of shiny metal, hence the reflection of the spider's under parts.

Actually, it has 8 eyes, as do most spiders.

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