In Part 1, you saw how your brain fills in gaps to keep the world feeling continuous. That same system does not stop at blind spots that just about everyone with average sight has. It has always worked this way.
Your brain acts like an editor working behind the scenes. It takes incomplete information, smooths over missing pieces, and decides what the final version should be.
Most of the time, it gets it right.
By the time you notice something is off, your brain has already made a decision. It saw enough and filled in the rest. With vision changes, it becomes easier to catch your brain in the act. Sometimes, it makes an assumption and commits.
Two Ways Your Brain Assumes It’s Correct
Sometimes it fills something in.
Brain: “That’s a person.”
Me: Oops. It is a coat on a chair.
Brain: “That’s the sugar.”
Me: Fresh cookie. Big bite.
Yuck. It was salt.
Brain: “That’s my friend!”
Me: Oh crap. I am talking to a stranger who just happens to have similar hair, stance, and clothes.
Brain: “That’s a dog.”
Me: I walk closer.
Darn. That is a little too green. Just a bush minding its own business.
Other times, it misses something that is actually there.
A facial expression looks fine, and a few seconds later you realize you missed a cue. The road looks clear until you hear tires on the asphalt. That surface looks clean until your hand disagrees. That shirt seems fine until someone kindly points out something is amiss.
Sometimes, it is more physical.
Brain: “No shadow. Still sidewalk.”
Me: Stumble. Ouch. …curb.
Brain: “I found the door!”
Me: Sudden stop. Dagnabbit. That was an extra dark shadow on a wall.
Same system. One adds; one overlooks. Your brain is not checking everything. It is checking enough to keep things moving.
There is a saying about assumptions. Your brain is not trying to get it wrong; it is trying to keep up.
Now Add Vision Changes to the Mix
This system does not go away when vision changes. It works with less reliable input.
When visual information is reduced, blurred, or inconsistent, the brain leans more heavily on memory, pattern recognition, and context. It fills in faster, decides sooner, and holds onto those decisions longer than it should.
That is why you may notice more confident misidentifications and more missed details.
You are not doing anything wrong. Your vision changes are making it easier to notice what your brain has always been doing.
When the Brain Goes Fully Off-Script
For some people with vision changes, the brain does not just fill in or miss things. It starts supplying things that are not there at all.
This is called Charles Bonnet (Bo-nay) Syndrome. It is not a mental health issue. It can happen when the brain is not getting enough reliable visual input and begins generating its own.
That might look like patterns, textures, faces, animals, or even full scenes that feel completely real.
The important detail is this. Most people experiencing this know it is not real.
With Charles Bonnet, you can often interrupt the imagery by:
- Changing lighting
- Moving your eyes or blinking rapidly
- Standing up or changing locations
- Focusing on another sense such as touch or sound
- Giving it time to pass as your brain adjusts
That makes it less about losing touch with reality and more like:
“My brain has decided to start an improv show with no input.”
This Is Where Humor Earns Its Keep
You have options when those moments happen.
You can turn it inward and ask, “What is wrong with me?” Or you can recognize what actually happened. Your brain made a very confident prediction with incomplete data. One of those leads to frustration and shaky confidence. The other creates space and sometimes something to laugh about.
I replay many of those moments like a Looney Tunes cartoon or a slapstick comedy. I cannot help but laugh.
Humor does not fix the moment, but it takes the edge off. It interrupts the self-blame loop and makes it easier to move on. It turns “What is wrong with me?” into “Well. That was a Good Laugh.”
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