Normal Saline for Eye Irrigation: Risks and Alternatives

Normal (0.9%) saline can be used for emergency eye irrigation when no dedicated eyewash is available, but it's not the preferred choice. Reasons:

• pH Concerns: Saline pH ~7.4 (physiological), but some ophthalmologists prefer ~7.0 for less irritation.
• Tonicity Concerns: Similar to blood, but hypertonic saline can cause corneal damage. Balanced salt solutions are preferred for eye irrigation.
• Preservatives: Saline lacks preservatives (good for allergies), but may not protect against microbial contamination if not fresh.
• Osmolarity: May not be optimal; specific ophthalmic solutions with balanced osmolarity provide better comfort and corneal protection.

In summary, use sterile commercial eye irrigation solutions or seek medical care for eye injuries. Normal saline is a last-resort emergency option.