Personally, I find that it is not great, barely doable. I actually advise others not to, but it should be easy for you to check.
It's my fave freediving mask, but I have others for spearing. I suspect you like it becuase it compresses so easy.
The funny thing is that our brains do such a good job of making up for the Sphera's visual "defects".
We don't notice the distortion much except for the corners but it is generally just really soft in focus, so to speak. I think because of the plastic lenses.
While in the water, try to swap from your Sphera to a proper flat glass mask and you will instantly know how much better real glass is.
If you need the ultra low-volume and especially the compression for EQ reasons (as I do), I suggest you look into the new Sub Gear Steel Comp. It can bend between the glasses making the whole frame very soft.
It's an amazing mask and my go-to mask for UW photography, spearfishing, fun diving and even scuba. Only for deeper freediving, do I go back to the sphera now.
That said, any low volume mask with glass lenses which fits you will work better for vision than a Sphera.
Normally, I tell people never to buy masks without trying them - except for the Sphera which is so flexible that it fits most anyone.
I'd like to say the Sub Gear Steel Comp is getting there but, I have been burned buying eg. an Omer Zero3 online without ever trying it. But that mask is notorious for prolly only fitting the Italian Omer dude who put his face in an injection mold of melted aluminum. Maybe it fits his twin brother and dad, too...
The Sub Gear Steel Comp does fit a ton of different face shapes, I know that but it's an expensive mask and I can't promise it'll fit you.
