Final answer:
The priority is to irrigate the eye immediately with tap water to wash away the chemicals. Finding out what the substance was is important for appropriate treatment.
Step-by-step explanation:
The priority when someone is splashed in the eye with a cleaning solution is to irrigate the eye immediately with tap water.
This will help wash away the chemicals and reduce the risk of damage.
Irrigation should be done for at least 15 to 20 minutes. After irrigation, it is important to find out what the substance was, as this information can help determine the appropriate treatment.