Have you ever noticed white flashes in the corners of your eyes and wondered what might be causing them? These fleeting moments of light, often referred to as peripheral vision flashes, can be disconcerting.
White flashes in vision typically occur when the retina, the thin layer at the back of your eye that senses light, is stimulated in some way.
This stimulation might not be related to actual light entering the eye but rather to some internal change or movement within the eye itself. These flashes can appear as small bursts of light, or a streak that might be momentary or last for a few seconds.
This article will take a deep dive into the phenomenon of white flashes in vision, covering everything from common causes to when you should seek medical advice.
Common causes of peripheral vision flashes
There are several potential causes for white flashes in the corners of your eyes, some of which are more common than others.
Understanding these causes can help you determine whether your flashes are a benign symptom of ageing or a warning sign of a more severe condition.
Posterior vitreous detachment (PVD)
One of the most typical reasons for seeing white flashes in vision is related to the natural ageing process. As you age, the vitreous—the gel-like substance that fills the majority of your eye—begins to shrink and liquefy.
This shrinkage causes the vitreous to pull away from the retina, a condition known as posterior vitreous detachment (PVD). When the vitreous tugs on the retina, it can create these sudden flashes of light in your peripheral vision.
PVD is quite common, especially in individuals over the age of 50. While the condition itself is usually not sight-threatening, it can lead to complications if it causes a retinal tear or detachment.
Therefore, if you suddenly start seeing these flashes, especially if they’re accompanied by an increase in floaters, it’s wise to get your eyes checked.
Retinal tear or detachment
A more severe cause of peripheral vision flashes is a retinal tear or detachment. The retina is essential for vision, converting light into signals that are sent to the brain.
If the retina tears, fluid can seep behind it, causing it to detach from the back of the eye. This detachment can result in a sudden, dramatic increase in the number of flashes and floaters, and if left untreated, it can lead to permanent vision loss.
Retinal detachment is a medical emergency. If you experience any of the following symptoms in addition to flashes—such as a shadow or curtain across part of your vision, or a sudden decrease in vision—you should seek immediate medical attention. Early treatment can often prevent the loss of sight.
Inflammation and infection
Inflammation within the eye, known as uveitis, can also cause white flashes in vision. Uveitis is the inflammation of the uvea, the middle layer of the eye, and can affect the iris, ciliary body, and choroid.
The condition can cause a variety of symptoms, including pain, redness, blurred vision, and flashes of light. Uveitis can be triggered by infections, autoimmune diseases, or eye injuries.
If you experience flashes along with pain and redness, it’s important to seek medical advice promptly. Untreated uveitis can lead to complications such as cataracts, glaucoma, or even vision loss.
When should you be concerned?
While seeing white flashes occasionally might not be a cause for immediate alarm, it’s essential to pay attention to the frequency and intensity of these flashes.
White flashes in the corners of your eyes can range from benign to potentially serious, depending on their cause. Understanding when to be concerned is crucial for protecting your vision.
Frequency and duration
If the flashes are infrequent and last only a few seconds, they are often not a cause for concern. These might occur due to eye strain, fatigue, or even sudden movement of the eye.
However, if you notice a sudden increase in the number of flashes or if they occur more frequently, it’s worth getting checked by an eye care professional.
Accompanying symptoms
The presence of other symptoms alongside peripheral vision flashes can be an indicator of a more serious condition.
For instance, if flashes are accompanied by a sudden increase in floaters, a shadow or curtain over part of your vision, or any form of visual loss, it could indicate a retinal tear or detachment.
As mentioned earlier, retinal detachment is a medical emergency, and immediate treatment is crucial to prevent permanent vision loss.
Other concerning symptoms might include pain, redness, or blurred vision, which could suggest an underlying inflammation or infection. In these cases, it’s important to seek medical advice promptly to avoid complications.
Changes in visual field
Any sudden or dramatic changes in your visual field—such as a decrease in vision, the appearance of dark spots, or a loss of peripheral vision—should be evaluated by an eye care professional as soon as possible.
These changes might be indicative of more severe conditions like retinal detachment, and early intervention can be key to preserving your sight.
What should you do?
If you experience persistent white flashes in vision, it’s crucial to consult with an eye care professional. They can perform a comprehensive eye exam, including a dilated eye exam, to check the health of your retina and vitreous. Early detection of any issues can help prevent more severe complications down the road.
Scheduling an eye exam
When you notice persistent white flashes or any other concerning changes in your vision, the first step is to schedule an eye exam. During this exam, your eye doctor will likely dilate your pupils to get a better view of your retina and vitreous.
This dilation allows for a more thorough examination of the back of your eye, which is crucial for detecting any retinal tears, detachment, or other abnormalities.
Your eye care professional may also perform other tests to assess your eye health, such as checking for signs of inflammation, infection, or pressure changes within the eye.
Depending on the findings, they may recommend further tests or refer you to a specialist for additional care.
Seeking treatment for inflammation and infections
If your white flashes in the corners of your eyes are due to inflammation or infection, prompt treatment is essential.
Depending on the cause, your eye doctor may prescribe anti-inflammatory medications, antibiotics, or other treatments to address the underlying issue.
In cases of uveitis, for example, corticosteroids may be used to reduce inflammation and prevent complications.
It’s important to follow your doctor’s instructions carefully and attend all follow-up appointments to ensure that your condition is improving. Ignoring symptoms or delaying treatment can lead to more serious problems, including permanent vision loss.
Protecting your eyes
In general, protecting your eyes from injury and excessive strain is key to maintaining good eye health and preventing issues like peripheral vision flashes.
Wear protective eyewear when engaging in activities that pose a risk to your eyes, such as sports, construction work, or using power tools.
Additionally, be mindful of your overall health, as conditions like diabetes and hypertension can have a significant impact on your eye health.
Regular eye exams are also crucial for early detection of any issues. Even if you don’t currently experience white flashes in vision or other symptoms, it’s important to have your eyes checked regularly, especially as you age or if you have a history of eye problems. Early detection and treatment can help prevent more serious complications down the line.
Final thoughts
Noticing peripheral vision flashes or white flashes in the corners of your eyes can be unsettling. However, understanding the potential causes and when to seek medical advice can help you take the necessary steps to protect your vision.
Your eyes are one of your most valuable assets, and staying vigilant about any changes in your vision is crucial for maintaining good eye health.
Whether these flashes are a result of natural ageing, migraines, or something more serious like retinal detachment, it’s important to listen to your body and act promptly if you notice any concerning symptoms.
Regular eye exams, proper management of underlying conditions, and taking care of your overall health are all key to ensuring that your vision remains clear and healthy for years to come.
