Flashes and floaters are common visual symptoms that many people experience at some point in their lives. In most cases, they are harmless and related to natural changes inside the eye. However, in some situations, they can be an early warning sign of a more serious retinal condition.
At Institute of Eye Surgery, we provide prompt, specialist assessment of flashes and floaters to ensure your vision is protected and any underlying issues are identified early.
Floaters appear as small shapes that move across your field of vision. They may look like:
Floaters are usually small, move quickly, and are most noticeable when looking at a bright background, such as a clear sky or white wall.
Flashes are brief visual sensations that look like flashing lights or lightning streaks, even though there is no actual light source. They are often more noticeable in dim lighting or at night.
Flashes can occur on their own but are commonly noticed alongside floaters.
As we age, the vitreous — the clear, jelly-like substance inside the eye — naturally thickens and shrinks. This can cause it to pull away from the retina, a process known as a posterior vitreous detachment (PVD).
In most cases, the vitreous separates cleanly without causing damage. Flashes usually fade and stop, while floaters often become less noticeable over 2–3 months.
PVD itself does not require treatment. Careful observation is recommended, with re-examination if symptoms worsen.
In some cases, the vitreous may be firmly attached to the retina or the retina may be weak in certain areas. As the vitreous pulls away, this can lead to a retinal tear.
Retinal tears are commonly treated with laser therapy to prevent progression to retinal detachment.
If fluid passes through a retinal tear, it can cause the retina to detach from the back of the eye — similar to wallpaper peeling away from a wall. This is a serious, sight-threatening condition.
Symptoms of retinal detachment may include:
Retinal detachment is treated surgically, often with vitrectomy and/or retinal buckling. The success of surgery depends on several factors, including how quickly treatment is performed.
Your visit begins with a detailed eye examination focused on the retina and vitreous.
Your consultant may perform a dilated retinal examination and advanced imaging to assess the retina in detail.
You’ll be informed:
You’ll receive clear guidance on next steps, which may include:
If you experience a sudden increase in floaters, new flashes of light, blurred vision, or a shadow or curtain in your vision, seek urgent eye assessment. Early evaluation is critical to prevent permanent vision loss.
Flashes and floaters are often harmless — but sometimes they’re not.
Contact our team or book an urgent eye examination to ensure your retina is healthy and your vision is protected.
IOES Waterford, UPMC Whitfield Hospital,
Co. Waterford, X91 DH9W
IOES Kildare, UPMC Kildare Hospital, Clane,
Co. Kildare, W91 W535
IOES Mullingar, Ballinderry Clinic, Mullingar,
Co. Westmeath, N91 WR82
IOES Athlone, 22 Mardyke Street, Athlone,
Co. Westmeath, N37 KC44
IOES Cork, The Elysian, Co. Cork, T12 KTD1
