There are people who can't tell left from right, and there are people who can't tell right from left. It's not clear why this is, but it may be due to a variety of factors, including neurological or perceptual issues.
People with this difficulty may have trouble with everyday tasks like reading or writing, and they may also have trouble with more complex tasks like driving or using tools.
There are some strategies that can help people with this difficulty, but it's important to remember that everyone is different and what works for one person may not work for another. If you or someone you know is having difficulty telling left from right, talk to a doctor or other healthcare provider to see if there is any underlying condition that could be causing the problem.