Flashes; What Do They Mean?

Seeing sudden flashes of light, like lightning or sparkles in your side vision? These are called flashes, and they can be a sign that something is tugging on your retina.
What Causes Flashes?
Most commonly, flashes happen when the clear gel inside your eye (the vitreous) starts to shrink or pull away from the retina. This is called a posterior vitreous detachment (PVD) and is a normal part of ageing.
When Should I Be Concerned?
Flashes that happen occasionally and without other symptoms are usually nothing to worry about. But if you notice:
- A sudden burst of new flashes
- Flashes with a shower of floaters
- A dark shadow or curtain in your peripheral vision
…it could be a retinal tear or detachment, which needs urgent attention.
What Should I Do?
If you’re experiencing any of those symptoms, contact us immediately. If it’s outside business hours, go straight to Gold Coast University Hospital for emergency eye care.
At VISION Michael Hare Optometrists, we use advanced imaging tools like ultra-widefield scans and OCT to examine the retina thoroughly and monitor any changes.
Related Articles:
- Floaters: What Are They?
- Blurry Vision: Sudden or Gradual?
- Eye Injury: What to Do
References:
- van Overdam KA, et al. Symptoms and findings predictive for the development of retinal breaks. Arch Ophthalmol. 2005.
- American Academy of Ophthalmology. Posterior Vitreous Detachment. 2022.
- Hollands H, et al. Acute-onset floaters and flashes: is this patient at risk for retinal detachment? JAMA. 2009.


