Why Do I Have Blurry Vision in One Eye?

blurry vision in one eye

Key takeaways:

  • The eyes work together to provide clear, 3D vision and depth perception.
  • While they function in tandem, how you can see in either may differ.
  • Blurry vision in one eye is common and may be caused by a long list of conditions.


Woke up with blurry vision in one eye that won’t go away? Many different factors can cause our eyesight to become blurry. But in some cases, you may find it peculiar that you’re only experiencing this in one eye. You’ll be surprised to know this is a common occurrence that many factors may cause.

Discover the possible reasons why you may experience blurry vision in one eye.


The Importance of Eye Health


Sight is an important part of everyday life, and your eyes allow you to do so. As sensory organs, your eyes capture light, creating signals your brain uses to transform into images you see. Without the eyes, your brain won’t get the information it needs to create vision.

Human eyes can function individually, but both work together to provide you with depth perception and a wider field of view. Although they’re independent, there are times when one eye may be able to see more clearly than the other.


Causes of Blurry Vision in One Eye


What can cause sudden loss of sight in one eye? What can cause blurred vision in one eye?

Whether your eyes have different eye grade levels from each other or whether it’s a result of underlying health issues, there are times when you experience blurry vision in just one eye instead of two. Here are some things that may cause this condition:


1. Eye Refractive Errors


Eye Refractive Errors


Refractive errors are the most common vision problem worldwide. These eye issues cause blurred vision because light fails to come into focus correctly on the retinas.

These vision errors come in several forms: nearsightedness, farsightedness, astigmatism, and presbyopia. An eye exam can diagnose which form you may have and how severe it is. The severity of such errors may vary between each eye, so one eye may have blurrier vision than the other.

Typically, eyeglasses with corrective lenses and contact lenses help improve your vision.


2. Pink Eye or Conjunctivitis


The eyes have a thin membrane called the conjunctiva. This covers the white part of the eyes and inner eyelids, and it helps protect and lubricate the eyes.

Conjunctivitis or pink eye is inflammation or swelling of this part of the eye. It may happen in both eyes or just one eye. Usually, cases of pink eye are mild, so they don’t affect vision. However, in more serious cases, you may experience sudden blurred vision.

Other than blurry vision, people with conjunctivitis may have the following symptoms:

  • The white part of the eyes becomes red or pink
  • Sensation of itching in the eyes
  • Swollen eyelids
  • Eye discharge
  • Excessive production of tears.


3. Cataracts


When the lenses of the eyes become cloudy, causing blurred or obstructed vision, a person may have developed cataracts. This vision problem is more common in older adults, and it may affect one or both eyes. As such, a person may have cloudy vision in one eye while the other eye’s vision fares better.

Some of the symptoms of cataracts include:

  • blurry or cloudy vision
  • diminished color vision
  • difficulty seeing in darker environments
  • difficulty reading
  • double vision
  • seeing a halo surrounding bright sources of light.

Cataract symptoms get worse over time, and if not treated, partial or full vision loss can occur. The primary way to treat cataracts is through surgery, in which the surgeon replaces your natural lenses with artificial ones.


4. Diabetic Retinopathy


Diabetic Retinopathy


People who suffer from diabetes may also develop vision problems. Retinopathy complications happen when a person’s blood sugar levels remain too high for a long time. This damages the capillaries in the body, including the ones found in the retina.

Damage to the retinal blood vessels may result in fluid leaking, which may cause swelling and blurred vision in one or both eyes. Other symptoms include worsening night vision, double vision, and the appearance of floaters.


5. Age-Related Macular Degeneration


The macula is crucial for seeing clear images, allowing you to see small details. However, as a person ages, he/she becomes more susceptible to age-related macular degeneration (AMD).

AMD is a disorder that affects the macula. At first, it affects only one eye, which may cause blurry vision in that eye. However, the condition usually progresses to the other eye, causing blurry central vision or vision loss.

AMD has two types: wet and dry.

Wet Macular Degeneration

This type of AMD happens when the capillaries form under the macula. These blood vessels tend to bleed and leak into your eyes, causing damage and scarring.

Dry Macular Degeneration

Dry macular degeneration cases are more common than their counterparts. Some early warning signs of dry AMD include white or yellow deposits forming under the retina and macula.


6. Retinal Migraines


Retinal migraines are a type of primary headache that may cause temporary blindness, blurry vision, or seeing bright flashing lights in either eye. The vision symptoms may happen before the headache pain, during it, or linger after the migraine.


7. Eye Strain


Eye Strain


If you’re experiencing blurry vision, whether only in one eye or both, you may suffer from eye strain. Its a typical result of looking at screens for a long period.

Eye strain can cause blurry vision, headaches, dry eyes, and pain in the shoulders and neck.


Urgent Causes of Blurry Vision




If you experience sudden blurry vision in both eyes (or even just one eye), headaches, numbness and weakness of the lips, face drooping, and slurred speech, it’s time to seek immediate medical attention. These are common early symptoms of a stroke, which need immediate treatment to minimize any further damage to the brain.

This happens when the blood supply to the brain is blocked, resulting in damage and possible cell death. It may result from a blood clot or plaque obstructing the blood vessels or from blood vessels rupturing.


Retinal Detachment


Another eye emergency for which you may seek medical attention is retinal detachment. A detached retina may cause sudden blurry vision in one eye. It stems from the retina being pulled away from the back wall of your eye.

If left untreated, this condition causes sudden blurry peripheral vision in one eye and may also cause the patient to see eye floaters and bright flashing lights. Alternatively, it may also cause the patient to suddenly spot a shadow in their field of view.


Angle Closure Glaucoma


Angle closure glaucoma is another eye emergency that may suddenly cause blurry vision in one eye. It occurs when intraocular pressure suddenly builds up, pressing on the optic nerve. This may result in permanent vision loss, usually in the affected eye. However, you may be able to avoid lasting damage if you seek medical attention immediately.


Frequently Asked Questions


Why am I losing vision in my left eye?


Ever experienced this scenario: having your left eye blurry and right eye fine? If you have, you may wonder whether there are eye problems that only happen to your left eye.

Well, no vision issue, only specifically targets the left eye. Since each eye functions independently while working together, they’re equally susceptible to eye problems that may happen to only one eye.


Why is one of my eyes blurry in the morning?


If you’ve experienced waking up to blurry vision, it’s usually nothing big to worry about. The most common cause of blurry morning vision is that your eyes have dried out while sleeping. The eyes need enough lubrication to function correctly and give you clear vision. After you’ve just woken up, your eyes likely don’t have enough tears to lubricate the surface of your eyes properly.


How do you fix one blurry eye?


To fix one blurry eye, you must first find out what’s causing it and tackle that specific eye problem. For example, if you have blurred vision due to refraction errors, you may need to wear contact lenses or corrective eyeglasses prescribed by the eye doctor.

Do remember to seek immediate medical attention if you suspect that sudden blurred vision in one eye is a symptom of a health emergency.


Keeping the Eyes Healthy


Having blurry vision in only one eye is usually not a big concern. Unless a medical emergency causes it, cases of having worse eyesight in one eye are commonplace for most people worldwide.

However, many of us take vision for granted, and the continued wear-and-tear of these sensory organs manifests itself through vision problems, including those that only affect one eye. To avoid such issues, take care of your eyes with the correct practices, nutrition, and eye health supplements.


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John Riedl

Simply put that’s why I’ve gone down the health journey of research and creating health brands.

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