Quick disclaimer: This post was translated using Gemini since English is not my native language.

I've had strabismus pretty much my whole life. It appeared after a vaccine when I was a toddler; there are old photos where my eyes were still straight, but I have no memory of it. My right eye pointed up and to the left. The strabismus was so severe that when I lowered my head and looked up, a large part of my iris was covered by my upper eyelid. Fortunately, it disappeared whenever I wore glasses, and my eyes aligned perfectly. Around age 18, I underwent corrective surgery. It wasn't exactly a roaring success—it improved things a lot, but still left a 1-2 mm deviation without glasses.

Throughout all these years, I never experienced stereoscopic vision, nor was any related therapy ever suggested to me by the doctors who followed me. I always assumed I just couldn't achieve it, and to be honest, having absolutely no clue what "seeing in 3D" actually meant, it didn't even bother me. For me, strabismus was always an aesthetic issue before a functional one.

The unexpected turning point

About a month ago, I went to an amusement park with my partner (Movieland in Italy). I tagged along with her to a 4D cinema show, fully knowing that, as usual, I wouldn't see anything. It was a short film about Back to the Future. At one point, a T-Rex appeared, lunging towards the audience, and... bam. For maybe 1 or 2 seconds max, I saw it "pop out of the screen."

This completely threw me off. That evening, I talked to Gemini about it. The AI's theory was that my level of immersion was so intense in that scene that my brain genuinely perceived a threat. Driven by survival instinct, it utilized every piece of information available to get me out of that situation—including data from the right eye (which is normally completely suppressed)—allowing me to see in 3D for a split second. According to the AI, this was also proof that my issue was more "software" (how my brain interprets the signals) rather than "hardware" (the eyes themselves).

My VR training routine

So, I started researching exercises I could do, and someone recommended using a VR headset. I began doing some very basic training:

1. I opened a VR scene with an object placed very close to my eyes.
2. I kept only my healthy eye open, focusing on its perspective.
3. I opened my operated eye and closed the healthy one, looking at the perspective of the operated eye.
4. Finally, keeping the operated eye open and trying to focus on its perspective, I very slowly opened my healthy eye, but only just a tiny crack, so its vision remained completely blurred.

The goal was to send a "dirty" signal from the healthy eye to the brain, forcing it to prefer the signal from the operated eye.

At first, absolutely nothing happened. For the first few days, the signal would just instantly snap back to the fixed perspective of my healthy eye the second I tried to open it. However, by the second day, I realized I could do something totally new for me: switch from one perspective to the other, even without fusion. I don't know how I do it, but I do. I learned to "choose" which eye's perspective my brain should see. Unlocking the right eye, however, didn't give me stereoscopic vision yet—just my classic 2D vision from a different angle.

When it finally clicked

I kept grinding away at the exercises. Eventually, I started seeing double when I opened both eyes while trying to keep the perspective of the operated eye locked. The images were split and moved almost in jerky steps. I pushed through, and one step at a time, they crept closer until they fused. I still didn't have the perception of "seeing in 3D," but something was definitely different: all surfaces looked way more detailed, as if I had upgraded from a FullHD monitor to a 4K monitor (and this wasn't just inside the headset, but in real life too).

Until, about a week into my journey, shapes in virtual reality started looking fuller, more present. It's impossible to explain—it would be like trying to explain what the color red looks like to someone who has never seen it—but I felt and "saw" that everything was much more tangible.

The definitive test came while looking at a face in VR:

The nose looked strangely close, almost out of place, as if it were invading my personal space. I could clearly see both earlobes in high definition. I closed my right eye → the perspective shifted and I only saw the left earlobe. I opened both eyes → two earlobes again. I closed the left eye → I only saw the right earlobe.

In that exact moment, I realized I was seeing in stereoscopy. I took off the headset, and even the world around me looked different. I did the finger test, and for the first time in my life, my finger shifted to the right too. That had never happened before.

Where I am today

Unfortunately, the first time lasted only about 10 minutes, but it gave me the motivation to keep going. All of this happened in just 7 days, doing VR sessions for about an hour a day!

A month later, I now lock into stereoscopic vision immediately in virtual reality; I always see in 3D there, which obviously makes me want to practice even more. As for real life, my 3D is still weak and inconsistent. I notice it depends heavily on lighting conditions—with high contrast and close objects, it's much easier; in low-contrast scenes, dim light, or with distant objects, I struggle.

My next step will definitely be to get guided by a specialist. My stereoscopic vision is by no means perfect, but it's a result I never imagined I'd reach in a single month. It's just incredible.

So, even if you feel "old" like me, don't discourage yourself: there is hope! 😄

POST EDITED: because of a missing part