**Eye fatigue** in a driver can be due to the **effects of sleepiness**. When a person is tired, whether from **physical** or **psychological fatigue**, they experience a series of symptoms that affect their ability to drive safely.

- **Physical fatigue** causes a **feeling of tiredness**, which can make the eyes feel heavy and vision deteriorate.
- **Psychological fatigue** makes **concentration** difficult, which can also contribute to eye fatigue.

Additionally, fatigue can manifest with other symptoms such as difficulty concentrating, slower movements, and increased irritability, all of which indicate that the driver is experiencing the effects of sleepiness. Therefore, it is important to recognize these signs and take measures to rest adequately before continuing to drive.