The day Ajin started squinting at her favorite cartoons

It was a typical Tuesday afternoon in our living room, the kind where the sunlight hits the floor just right and everything feels quiet. Ajin, who turned four this April, was sitting on the rug watching her favorite show. Haneul was curled up next to her, his white fur blending into the carpet, while Pudding was perched on the highest level of her cat tower, looking down with her usual aloof expression. Everything seemed perfectly normal until I noticed Ajin's face. She was squinting, her tiny eyebrows furrowed as if she was trying to solve a complex math problem rather than watching a simple cartoon. Then, she stood up and slowly walked toward the TV until her nose was just inches from the screen.

At first, I thought it was just a phase or a bad habit she'd picked up. I called her back to the sofa, and she obeyed, but five minutes later, she was right back at the screen. My heart sank a little. I remembered how my own parents used to tell me not to sit too close to the TV, but seeing my own daughter do it felt different. It felt like a warning sign I wasn't ready to face. I watched her for the rest of the afternoon, and the squinting didn't stop. Even when she was playing with her blocks, she seemed to be holding things closer to her face than usual.

My husband stayed up all night searching for pediatric myopia

When my husband came home from work, I mentioned it casually, hoping he would tell me I was overreacting. Instead, his reaction was the complete opposite. As a typical Pattern B personality, he immediately went into a full-blown research spiral. While I was trying to get Ajin to eat her dinner, I could hear him in the other room, his fingers tapping furiously on his phone screen. He didn't even finish his meal before he started listing off every possible eye condition a four-year-old could have.

'Do you think it's pseudo-myopia? Or what if it's amblyopia?' he asked, his voice trembling slightly. He spent the entire night reading through parenting forums and medical blogs, becoming more pale with every article he found. He was searching much more than I was, convinced that we had waited too long and that Ajin would need thick glasses before she even started kindergarten. By midnight, he had already researched the best pediatric ophthalmologists in our part of Seoul and insisted we make an appointment for the very next morning. His anxiety was contagious, and I found myself lying awake, worrying about whether I had let her watch too many YouTube videos during the winter months when it was too cold to go outside.

What the doctor said and the numbers I started tracking

The next morning, the eye clinic was crowded with children. Ajin was surprisingly brave, though she kept holding onto my hand tightly. Haneul had been pacing by the front door when we left, sensing our stress, but we had to leave him behind with a confused Pudding. The wait felt like hours. When we finally saw the specialist, she was very patient. She used various lights and colorful toys to check Ajin's focus. My husband stood behind me, practically vibrating with nervous energy, waiting for a definitive answer.

The doctor explained that while Ajin's vision wasn't 'bad' in the traditional sense, she was showing signs that her eyes were under a lot of strain. She mentioned that at age four, a child's eyes are still developing rapidly. She didn't prescribe glasses immediately but told us we needed to be extremely vigilant. This is just our experience, of course, and if you notice your child squinting, you should definitely see a professional right away. But for us, it was a wake-up call. We left the clinic with a list of 'lifestyle adjustments' rather than a prescription.

From that day on, I started a dedicated diary for Ajin's daily habits. I began tracking her screen time—strictly under 30 minutes—and her 'green time' outdoors. I realized that during the busy weekdays, I hadn't been paying enough attention to how much time she spent looking at things up close. Now, every time we take Haneul for his walk, I make sure Ajin is looking at the mountains in the distance or the birds in the trees. It’s a bit of a challenge because Haneul is so timid and gets stressed in new places, so we have to stick to our quiet, familiar route, but it’s become our vital daily routine.

The Ajin Line and our new living room rules

To make the changes easier for a four-year-old to understand, we decided to get creative. Instead of constantly nagging her to 'sit back,' we bought some bright yellow character tape—the kind with little bears on it. We taped a long, straight line on the living room floor about two meters away from the TV. We called it the 'Ajin Line.' I told her it was a magic boundary that kept her eyes safe. To make it more convincing, I told her that Haneul also has to stay behind the line when he watches TV with her.

Of course, Pudding doesn't care about our rules. She often goes and sits directly on the tape line, or even in front of it, just because she can. Her short Munchkin legs make her look like a little loaf of bread sitting right in the way. But surprisingly, Ajin has been very disciplined about it. She sits cross-legged behind the yellow tape, and if she forgets and starts to drift forward, I just have to say, 'Where's the line?' and she scurries back. We also swapped out our living room light bulbs for ones that don't flicker and installed a blue light filter on the iPad, though we rarely let her use it now.

My husband is still a bit of a nervous wreck about it. He checks the brightness of the room every evening and bought a special desk lamp for when Ajin does her coloring books. He’s even started looking into 'eye-healthy' recipes, insisting that we incorporate more lutein-rich foods into her meals. It’s a bit much sometimes, but I know it comes from a place of love. We're trying to turn these chores into a game, but the underlying worry is always there.

The lingering guilt and the upcoming appointment

Even though we've made all these changes, I still find myself watching her eyes every single day. Every time she blinks a little too much or rubs her eyes, my heart skips a beat. I can't help but feel a sense of guilt. Did I let her use the phone too much when I was tired? Was the lighting in her playroom too dim for all those months? It’s hard not to blame myself when something goes wrong with your child, especially something as precious as their sight.

Next month is our follow-up appointment at the clinic, and I'm already feeling anxious about it. I keep wondering if the 'Ajin Line' and the outdoor walks are actually making a difference, or if we're just delaying the inevitable. My husband has already marked the date in red on the calendar and I know he'll be back on the search engines the night before. There are so many things to worry about when you're a parent, and it feels like as soon as you settle one issue, another one pops up. I just hope that when we sit in that waiting room again, the news is a little better than last time.

There was something else that happened yesterday while we were out walking Haneul, but I'm still trying to process if it's related to her vision or just her being a typical four-year-old.