When a person is having problem seeing in dim light, he/she may be lacking vitamin

The person may be lacking Vitamin A. This vitamin is crucial for maintaining your eyes' ability to adjust to darkness. A deficiency in Vitamin A can lead to night blindness, which is difficulty seeing in low light or darkness.

Here are the steps that lead to this conclusion:

1. The problem described is difficulty seeing in dim light. This is a common symptom of night blindness.

2. Night blindness is often caused by a deficiency in Vitamin A. This is because one of the components of the light-sensing protein in our eyes, called rhodopsin, is derived from Vitamin A.

3. When there isn't enough Vitamin A in the body, the production of rhodopsin can be hindered. This can make it harder for the eyes to adjust to lower levels of light.

4. Therefore, if a person is having trouble seeing in dim light, it's possible that they may be lacking Vitamin A.

It's important to consult with a healthcare provider if you're experiencing difficulty seeing in low light. They can provide a proper diagnosis and treatment plan.