Hi,

I've just started to notice in the last couple of days, in my right eye, a slightly darker & slight blurry circular area in the main focus point of my vision for that eye. Width is about 3 fingers at arms length.

Any ideas what this could be?

Some info:
* Picture I drew



* Did start talking asthma medication a couple of days ago (Cortisone based, it's Prednisone) - in fact as I type I see they say for example
"Prednisone use can affect the eyes as well. The most common side effects in the context are glaucoma and cataract formation. These usually occur with topical or intraocular administration of prednisone, but they can also appear with oral, intravenous, or even inhaled administration"
* Have been putting contacts in & out - so have touched my right eye