Sudden Blurred Vision: Some Reasons You May Have It


A problem with any part of your eye like the cornea, retina, or optic nerve, can cause sudden blurred vision and blurry vision is very common. However, slowly progressive blurred vision is caused by some medical conditions. While sudden blurring is caused by a single event. Some causes of sudden blurred vision are as follows

Conditions Needing Immediate Evaluation And Treatment

Some sudden blurry vision need medical emergencies that must be treated to reduce the risk of permanent damage and vision loss as soon as possible.

Detached Retina

When your retina tears away from the back of your eye and loses its blood and nerve supply, detached retina occurs. When it occurs, black flecks are visible, followed by an area of blurred or absent vision. It may cause permanent vision loss if it not treated well.


Blurry vision can occur when you have a stroke on both eyes affecting the part of your brain that controls vision. A stroke in your eyes causes blurred or lost vision in only one eye. Symptoms of a stroke include weakness on one side of your body or the inability to speak.

Transient Ischemic Attack

A transient ischemic attack is a stroke that remain less than 24 hours. The main symptoms can be blurred vision in one or both eyes.

Wet Macular Degeneration

Sudden Blurred Vision

Macula is the center part of retina. When there is leakage of blood into the macula, it’s called wet macular degeneration. It causes blurriness and vision loss in the center of your visual field. Unlike dry macular degeneration, this type can begin suddenly and progress rapidly.

Other Causes Of Sudden Blurred Vision

Eye strain

Sudden Blurred Vision

Eye strain can occur after looking at and focusing on something for a long time without a break.

When it’s the result of focusing on an electronic device like a computer, video monitor, or cellphone, it’s sometimes called digital eye strain. Other causes include reading and driving, especially at night and in poor weather.


Sudden Blurred Vision

Conjunctivitis also called pink eye, it is an infection of the outside lining of your eye. It’s usually caused by a virus or bacteria.


Hyphema is the dark red blood that pools inside the front of your eyeball. It is caused by bleeding that occurs after sustaining trauma to your eye. If it increases the pressure inside your eye, it become painful.


Sudden Blurred Vision

The colored part of your eye is called iritis. It occurs when an autoimmune reaction causes the iris to become inflamed. It can occur by itself or as part of an autoimmune condition. It can also be caused by infections like herpes and is often very painful.


Keratitis is the Inflammation of the cornea. Keratitis is usually caused by an infection. Using contacts for too long or reusing dirty contacts can increase the chances of keratitis.


Sudden Blurred Vision

The area in the center of your eye that contains the iris is known as uvea. The inflamed and painful uvea cause by infection or autoimmune reaction is called uveitis.

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