As someone who is visually impaired, I've noticed that my days and nights often get mixed up. This happens because my body relies on light to regulate my internal clock, the circadian rhythm, which controls when I feel awake or sleepy. Since I can’t perceive light the way others do, my body doesn’t get the usual signals that help people know when it’s time to be awake or go to sleep.
As a result, my sleep patterns can become out of sync with the typical 24-hour day-night cycle. There are times when I find myself wide awake in the middle of the night or feeling extremely tired during the day, which can be frustrating. It’s like my internal clock drifts and follows its own schedule, leading to unpredictable sleep times.
I’ve learned that this is actually quite common for people with limited or no light perception and is known as "non-24-hour sleep-wake disorder."
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