It is quite common to feel that something you are looking at with your eyes is not clear, as if you are looking through a thin veil of mist. Sometimes it is temporary and resolves on its own, while other times there may be an underlying cause that needs attention. In this article, we explain what blurred vision is, the most common causes, and when you should see a doctor in simple terms.
What is blurred vision?
Blurred vision is the loss of sharpness in the image you see, where edges and details cannot be clearly distinguished. Some people describe it as "as if my glasses are fogged up," while others say "everything seems to be slightly shaking or drifting."
This condition may not be the result of a single disease, but rather a common outcome of many different causes. For example:
● Simple eye strain
● Change in glasses or contact lens prescription
● Dry eyes
● A more serious eye or body health issue
In short, blurred vision is not a disease in itself but a symptom. What is important is to notice how often, when, and under what circumstances this symptom appears.
What are the causes of sudden blurred vision?
Blurred vision occurring suddenly, meaning within a few minutes or hours, should be evaluated differently from blurred vision that develops gradually. The main causes of sudden blurred vision can include:
● Eye strain: Prolonged screen time, lack of sleep, or straining the eyes can cause temporary blurriness.
● Sudden blood sugar changes: A rapid rise or drop in blood sugar can temporarily affect vision.
● Blood pressure changes: A sudden increase or decrease in blood pressure can create a feeling of blurriness in the eyes.
● Migraine: Temporary blurriness, flashes, or a feeling of drifting can occur before or during a migraine attack.
● Sudden increase in intraocular pressure: Although rare, a rapid increase in eye pressure is an emergency that requires immediate intervention.
● Eye trauma or foreign body: A blow to the eye or the presence of an object in the eye can lead to sudden blurriness.
If the blurriness started suddenly and does not resolve on its own, we recommend consulting an eye doctor without delay.
What does blurred vision in one eye indicate?
Blurred vision occurring in only one eye can have a different meaning compared to occurring in both eyes. This is because an issue affecting one eye is generally related to that eye itself rather than a problem with the body as a whole; it often stems from a change in the structure of the eye.
Possible causes of blurred vision in one eye may include:
● A refractive error specific to that eye (myopia, hyperopia, or astigmatism)
● More pronounced dry eye in one eye
● Conditions affecting the transparency of the lens, such as cataract
● A sudden issue related to the blood vessels inside the eye
● A change related to the retina
Blurred vision that occurs in one eye and does not resolve quickly, especially if it started suddenly, should definitely be shown to an eye doctor.
What causes blurred vision and dizziness?
Experiencing dizziness along with blurred vision often indicates a condition related more to our balance system or nervous system than to the eyes. The eyes and inner ear work together to maintain the body's balance; if one is affected, the other may also be affected.
Conditions that can lead to the simultaneous occurrence of these two include:
Blood sugar or blood pressure imbalances
Migraine attacks
Balance disorders related to the inner ear
Fatigue, dehydration, or prolonged fasting
Side effects of certain medications
If blurred vision and dizziness occur together frequently or severely, it is advisable to consult a doctor for evaluation regarding both eye and overall health.
Does diabetes cause blurred vision?
Yes, diabetes is one of the most common causes of blurred vision. When blood sugar rises, the shape of the lens inside the eye can temporarily change, leading to unclear vision. When blood sugar levels stabilize, this type of blurriness usually resolves on its own.
However, uncontrolled diabetes over many years can also affect the fine vessels in the retina of the eye. This condition is commonly referred to as "sugar eye" in daily life and can progress to permanent vision loss over time. Therefore, it is very important for individuals with diabetes to:
● Regularly monitor blood sugar levels
● Get retinal examinations at specific intervals
● Consult an eye doctor promptly if they notice sudden or persistent blurriness
This is crucial. Diabetic eye problems often do not show symptoms in the early stages; hence, regular check-ups are the most effective way to preserve vision.
How is blurred vision treated?
The treatment of blurred vision varies depending on the underlying cause. Therefore, a correct diagnosis must be made before starting treatment. Generally followed approaches include:
● Glasses or contact lenses: For blurriness caused by a refractive error, glasses or lenses prepared with the correct prescription are often sufficient.
● Treatment for dry eyes: Artificial tears and recommendations for keeping the eyes moist can significantly reduce blurriness.
● Blood sugar and blood pressure management: Keeping these values stable prevents the recurrence of related blurriness.
● Cataract surgery: In cases where blurriness is caused by loss of lens transparency, surgery offers a permanent solution.
● Treatments related to the retina: For issues related to the retina, condition-specific medications, laser, or surgical methods can be applied.
● Treatment of the underlying general health issue: In cases such as migraine, hypertension, or diabetes, the main treatment is directed towards that illness; the blurriness also improves with this treatment.
The first step for the correct treatment is always to undergo an eye examination. Methods applied before determining the cause of the blurriness may not provide a permanent solution.
Prepared by the Publication Committee of Dünyagöz Hospital.
*The content of the page is for informational purposes only. Please consult your doctor for diagnosis and treatment.
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Frequently Asked Questions
If it is due to mild causes like fatigue or temporary blood sugar fluctuations, it usually resolves on its own in a short time. However, if it is recurring or lasting for a long time, you should definitely see an eye doctor.
Blurred vision that occurs suddenly, develops in one eye, and is accompanied by severe headache or weakness should be considered an emergency, and you should seek medical attention as soon as possible.
No. Blurred vision can occur at any age. In young people, it is more often related to eye strain, dryness, or refractive errors, while in older age, conditions like cataract play a more frequent role.
Prolonged screen time can lead to dry eyes and eye strain, creating a temporary sense of blurriness. Regular breaks and paying attention to blink frequency can reduce this condition.
If blurriness does not resolve within a few days, recurs, occurs in one eye, or is accompanied by other symptoms such as dizziness or headache, it is advisable to consult an eye doctor without delay.