Common health issue

Sudden Blurry Vision: 14 Reasons You May Have Blurry Vision

blurry vision

Blurry vision is quite common which is a problem of the components of your eye like the the cornea, retina, or optic nerve which can cause sudden blurred vision. Slowly progressive blurred vision is usually caused by long-term medical conditions whereas most often caused by a single event.

Causes Of Sudden Blurry Vision

Some causes of Blurry vision that occur suddenly are due to medical emergencies that must be treated as soon as possible in order to prevent permanent damage and vision loss.

Transient Ischemic attack

A transient ischemic attack is a kind of stroke that usually lasts for less than 24 hours. One of its symptoms can be blurred vision in one eye or both of them.

Wet macular degeneration

The center of your retina is known as the macula where the abnormal vessels may grow, causing blood and other fluid to leak into the macula which is known as macular degeneration. It usually causes blurriness and loss of vision in the center part of your visual field. Unlike dry macular degeneration, this type can begin and progress rapidly.

Detached retina

A detached retina mostly occurs when your retina tears away from the back of your eye and loses its blood as well as nerve supply. When it happens, you see flashing lights including the black flecks which are followed by an area of blurred vision. Without emergency treatment, vision in that area may be lost permanently.

Stroke Can Cause Blurry Vision

Blurry vision in both of the eyes can occur when you have a stroke affecting the certain portion of your brain that controls the vision. A stroke involving your eye causes blurred vision in only one eye. You may have other symptoms of a stroke such as weakness on one side of your body or also have the symptoms like inability to speak.

Angle-closure glaucoma

Angle-closure glaucoma occurs when the drainage system within the eye gets blocked. In this situation, the pressure inside the eye can go up very quickly which causes redness, pain, as well as nausea. This condition is a medical emergency and also requires treatments with eyedrops to open the range, decrease the pressure and inflammation. Many times a laser procedure which is called laser iridotomy is also required.

Other causes of sudden blurred vision


Eye strain can occur after looking and focusing on something for a long time without a break. When it is the result of focusing on an electronic device like a computer then it’s sometimes is called the digital eye strain. Other causes include reading and driving usually at night.


Also called pink eye, conjunctivitis is an infection of the outside lining of your eye that is usually caused by a virus but can also be caused by bacteria.

Corneal abrasion

Your cornea is the clear covering on the front of your eye but when you get scratched you may develop a corneal abrasion. In addition to this condition blurry vision, you may feel like there is something in your eye.

Does High blood sugar Cause Blurry Vision

Very high blood sugar levels cause the lens of your eye to swell which leads to blurred vision.


The dark red blood that pools inside the front of your eyeball is called a hyphema that is caused by bleeding that occurs after your eye is injured. It can become painful if it rise the pressure inside your eye.


The iris is the colored part of your eye which occurs when an autoimmune reaction or an infection causes the iris to become inflamed. It can occur by itself such as rheumatoid arthritis. It can also be caused by infections like herpes which is painful and cause sensitivity to light also called photophobia.


The uvea is a collection of the pigmented structures in the eye which also includes the iris. An infection can cause it to become inflamed and painful which is known as uveitis.

Temporal arteritis

Inflammation in the medium-sized arteries is known as temporal arteritis. The vessels around your temples can be involved causing a throbbing headache in your forehead but it can cause your vision to blur.

Optic neuritis Can cause Blurry Vision

The optic nerve connects your eye and also your brain. The inflammation of the optic nerve is known as optic neuritis. It is usually caused by an auto-immune reaction. Other causes are autoimmune conditions such as lupus or also an infection. Most often, it affects only one eye.