Why are your eyes blurry and foggy after swimming in saltwater pools?

Blurry and foggy vision after swimming in saltwater pools is primarily due to the presence of high concentrations of salt in the pool water. Here's why your eyes may feel this way:

1. Hypertonic Environment: Saltwater pools usually have higher salt concentrations than natural tears. When your eyes come into contact with this hypertonic environment, water from your tear film gets drawn out by osmosis to balance the salt levels. As a result, the tear film becomes thinner and less effective in lubricating the surface of the eyes, leading to temporary blurred or foggy vision.

2. Changes in Corneal Shape: The cornea, the transparent outermost layer of the eye, is responsible for focusing light onto the retina. The high salt content in saltwater can temporarily alter the shape of the cornea, causing refractive errors and impairing vision.

3. Irritation and Inflammation: Saltwater can also irritate the delicate tissues of the eye, including the conjunctiva and cornea. This irritation triggers inflammation, leading to increased blood flow and fluid buildup in the eye. These changes further contribute to blurred vision and discomfort.

4. Increased Sensitivity: The increased salt concentration can also make the eyes more sensitive to light and glare, causing them to appear hazy or foggy. This sensitivity usually subsides once you leave the saltwater pool.

5. Individual Sensitivity: Some individuals may be more sensitive to saltwater's effects than others. Factors like contact lens wear, dry eye conditions, and pre-existing eye problems can make individuals more susceptible to blurry vision in saltwater pools.

To minimize blurry vision and discomfort after swimming in saltwater pools:

- Rinse your eyes thoroughly with fresh water after swimming.

- Use lubricating eye drops to help restore moisture and reduce irritation.

- Wear goggles or swimming goggles while in the pool to protect your eyes from direct contact with saltwater.

- Avoid touching or rubbing your eyes with your hands while swimming.

- Take breaks from swimming if your vision becomes excessively blurred or uncomfortable.

- If your vision remains blurry or irritated even after taking these measures, consult a qualified eye doctor for further evaluation.