And the definitive answer to haziebabie is …Perhaps!
In crude terms, there are three parts to the human visual system:
The three layers of cells at the back of the eyeball - all connected into a very thin network.
The optic nerves - part of which cross over behind the bridge of the nose.
The visual cortex - two actually that are fed by the optic nerves.
A problem with any part of this can affect the “visual field”. You probably had your head in a half-dome trying to count the number of tiny lights that came on. The optician - properly called an optometrist - can see where the problem is in general terms, and this is usually enough to get you referred up to consultant level.
Most Optic Neuritis attacks come with some sort of pain, or with some really wild visual effects. It sounds like you have a condition that does not cause an everyday problem but which warrants an investigation by a specialist to determine just how extensive the problem is.
Not something to lose a lot of sleep over, most likely.