Blurry vision can be caused by something as minor as eye fatigue or as serious as a medical emergency. While temporary blurriness may result from staring at a screen for too long or forgetting to wear your glasses, sudden or severe changes in vision could be a warning sign of a more serious underlying condition. Knowing when to seek immediate care can help protect your eyesight and overall health.
 

Common Non-Emergency Causes of Blurry Vision

In many cases, blurry vision develops gradually and is linked to manageable conditions such as:

• Refractive errors (nearsightedness, farsightedness, astigmatism)

• Dry eye syndrome

• Eye strain or fatigue

• Uncorrected vision prescriptions

• Contact lens overwear
   

While these situations should be addressed during a routine eye exam, they are generally not urgent.
 

Signs Blurry Vision May Be an Emergency

Blurry vision becomes a medical emergency when it appears suddenly, affects one eye, or is accompanied by other concerning symptoms. Seek immediate medical attention if you experience:
 

• Sudden vision loss in one or both eyes

• Blurry vision with eye pain, redness, or sensitivity to light

• Flashes of light, floaters, or a shadow/curtain over your vision

• Double vision

• Blurry vision following a head injury

• Numbness, weakness, or slurred speech alongside vision changes

• Eye trauma or chemical exposure
   

What Conditions Can Cause Sudden Blurry Vision?

If your blurry vision comes on suddenly, it could be related to a number of underlying health conditions - some of which extend beyond the eyes. Here are a few possibilities your eye doctor may consider:
 

• Retinal Detachment: This occurs when the retina pulls away from the back of the eye. Immediate treatment is necessary to preserve sight.

• Acute Angle-Closure Glaucoma: This is a medical emergency where fluid pressure builds up quickly in the eye. 

• Diabetic Retinopathy: In individuals with diabetes, high blood sugar levels can damage the blood vessels in the retina, leading to sudden vision changes. This condition requires prompt medical evaluation to prevent further complications.

• Ocular Migraines: These migraines can temporarily affect vision, causing blurriness, flashing lights, or blind spots. While usually not dangerous, it’s important to rule out more serious causes with an eye exam.
   

We’re Here to Help

Blurry vision isn’t always cause for alarm, but when it appears suddenly or is paired with other symptoms, it could indicate a serious medical issue. Recognizing the warning signs and seeking timely care can make all the difference in protecting your eyesight and overall health.
 

If you’re experiencing sudden blurry vision, schedule an eye exam at Today’s Vision Bulverde for personalized treatment. Visit our office in San Antonio, Texas, or call (210) 307-4749 to book an appointment today.