Odd Guppy Eyes

[Moonweaver]

I got a few guppies and now I think there's something wrong with their eyes. Not all of them are like this, just one or two. The white circle around their eye is black, it's slowly dissappearing. In the first picture is the guppy with weird eyes and the second is normal

Does anyone know why this is happening?

 

[Colin_T]

Check your water quality for ammonia, nitrite, nitrate, pH and GH. Make sure the water is good.

Do a 75% water change and gravel clean the substrate if there is any readings.

Guppies can change their eye colour depending on mood. Males normally do it as a territorial/ threat display to other males, but females can also do it.