Just today I noticed something new covering my iPhone camera lens. It looks like a shutter or aperture blade over the optics, but knowing that the iPhone has neither, I'm really confused. The camera is able to take pictures still, but I can't imagine this would help. I have not dropped the phone to my recent knowledge and I do not believe this "blade" was covering the optics yesterday.
You could clean the lens of your iPhone internally and see what that black object is that blocks the clear view. I've done this when some dust or tiny particles slip into the iPhone...
It's very easy and you won't do any harm with it, if you follow the instructions carefully!
- Open up your iPhone according to the tutorial on iFixit
- Use a slightly moistened ear-swab to clean up your iPhone lens
- To reassemble your iPhone, just follow the steps on iFixit in reverse order.
If you find a piece has slipped, once correcting that, you can also clear out all dust from your lens and it can solve your issue.