Final answer:
Normal saline is the solution used for eye irrigation because it is isotonic with the body's physiological saline concentration, ensuring safe and effective eye care. The correct option is B.
Step-by-step explanation:
The solution typically used for eye irrigation is normal saline. This is because normal saline is isotonic with the physiological saline concentration in our bodies, which is approximately 0.16 M of sodium chloride. Being isotonic ensures that the fluid balance in the eye's tissues is maintained and that no cellular damage from osmotic pressure occurs.
Reference to medical literature would confirm that normal saline is used intravenously to correct dehydration, demonstrating its compatibility with the body's fluids.
Other options, such as phenylephrine HCL, are not intended for irrigation but for purposes like dilating the pupil during an eye exam or increasing blood pressure under certain conditions.