Ever opened your eyes in the morning and found that the room looks a little fuzzy? You blink once or twice, rub your eyes, and wait for things to become clear.
For some people, the blur disappears within a few minutes. For others, it happens often enough to become annoying.
There are several reasons this can happen. Dry eyes are a common one. Contact lenses, screen use, changes in blood sugar, and some eye conditions can also affect how clearly you see.
Why Is My Vision Blurry in the Morning?
Your eyes need tears even when you are not crying. Tears form a thin layer over the front of the eye. This keeps the surface comfortable and helps you see clearly.
While you sleep, you are obviously not blinking. When you wake up, the surface of your eyes may feel a little dry. This can make your sight seem hazy at first.
A few other things can be behind morning blur.
Your Eyes May Be Dry
Dry eyes do not always feel very “dry.” Sometimes the first thing you notice is blurry sight.
Your eyes might also burn, sting, water, or feel as though there is a bit of sand in them. You may find yourself blinking several times because your vision becomes clearer after you blink.
A fan or air conditioner blowing towards your face at night may make the dryness worse.
You Slept in Your Contact Lenses
Falling asleep with contact lenses in can leave your eyes irritated the next morning. You might wake up with redness, discomfort, or blurred sight.
Unless your lenses have specifically been approved for overnight wear, take them out before going to bed.
Too Much Screen Time Can Play a Part
Think about what you did before bed. Were you scrolling through your phone for an hour? Or finishing work on a laptop?
People tend to blink less while looking at screens. This can dry the surface of the eyes and contribute to eye strain. Blurry vision is one possible symptom.
Blood Sugar Can Affect Your Sight
Changes in blood sugar can sometimes change vision as well. This is particularly important for people who have diabetes.
If blurry vision keeps coming back rather than clearing soon after you wake up, it is better to have it checked instead of assuming that tired or dry eyes are the cause.
Can Dehydration Cause Blurred Vision?
It may contribute, especially when dehydration is accompanied by dry eyes.
Your body needs enough fluid to work normally, and your eyes rely on a healthy tear film. If your eyes become too dry, the surface may not stay smooth. Your vision can then appear blurry or change from one moment to the next.
You may become dehydrated if you have not had enough water, have been sweating a lot, or have been unwell with vomiting or diarrhoea.
Drinking enough fluids is a sensible habit. But water is not a treatment for every case of blurry vision. If you are drinking normally and the problem keeps happening, something else may be causing it.
When It Is Worth Getting Your Eyes Checked
A little morning fuzziness that clears quickly can happen. Blur that keeps returning, lasts longer, or gets worse deserves more attention.
At Magnet Health’s optometry service in the Bronx, patients can have their vision and eye health checked to find out what may be behind a change in sight. An eye exam can also pick up problems that are easy to miss when you simply put the symptoms down to tiredness or dehydration.
Sudden vision loss or a sudden major change in sight is different. Seek urgent medical care, particularly if it comes with severe eye pain, weakness, trouble speaking, or other unusual symptoms.
So, can dehydration cause blurred vision? It may contribute to dryness and temporary blur in some situations. But if you regularly wake up wondering, “Why is my vision blurry in the morning?”, do not keep guessing. An eye examination can help find the actual reason.
