Based on published clinical guidance · Last updated 29 October 2026
Seek urgent eye assessment for new flashes or a sudden increase in floaters, particularly with a shadow, curtain or reduced vision. AAO advises examination of new symptoms because a tear or detachment is possible. Do not wait for a routine booking or decide they are harmless because the eye is comfortable. Use an emergency department if appropriate eye care is unavailable. [13][14]
A new shower of floaters, increasing flashes, a spreading shadow or curtain, or a drop in vision requires urgent advice. Cambridge University Hospitals highlights these changes after PVD. A previous clear examination describes that earlier moment, not the cause of new symptoms. Contact an urgent eye service and use an emergency department if appropriate help is unavailable. [11][14]
Floaters are shapes you notice when material inside the vitreous casts shadows on the retina. NEI describes spots, threads and cobweb-like forms that move with the eye. Many are related to ordinary vitreous changes, but bleeding, inflammation and retinal problems can also cause them. A new or changed pattern needs assessment rather than a diagnosis from appearance alone. [8]
Pulling of the vitreous on the retina can create the sensation of a flash without an external light. AAO explains this mechanism, but other visual effects can have different causes. Tell the examiner whether the pattern is new and whether there are floaters or missing vision. Do not assume a first or changed episode is migraine without advice. [13]
PVD is separation of the vitreous gel from the retina, rather than detachment of the retina itself. NEI explains that age-related changes can make the vitreous fibres pull away. It often needs no treatment if uncomplicated, but the process can sometimes cause a retinal tear. The examination checks for that complication before reassurance is appropriate. [9]
No; PVD affects the gel’s attachment, while retinal detachment means the retina has lifted away from its supporting position. The two can be related because a tear during vitreous separation may allow fluid under the retina. NHS information describes retinal detachment as a problem needing prompt treatment, so a new curtain or lost vision needs urgent assessment. [9][10]
One community-referral study found tears in 9.9% of eyes with symptomatic PVD at the first assessment. That figure describes the study’s referred symptomatic group, not everyone with an occasional longstanding floater. It supports examination of a new episode. Your own findings and history guide the plan; the study average cannot tell you whether your retina is torn. [4]
Yes; the same community study found a delayed tear rate of 3% by two months after the initial assessment. A clear examination therefore does not guarantee that later changes are harmless. Follow the return advice and seek reassessment for increasing flashes, a shower of floaters, missing vision or a curtain rather than waiting for the scheduled review. [4]
Yes; short-sightedness and previous eye treatment can affect retinal risk and the follow-up discussion. AAO includes these details in the history for retinal breaks and PVD. Tell the examiner your usual prescription and any earlier tear, detachment or eye injury. Risk factors help guide care but cannot establish the diagnosis without examining the retina. [3]
Yes; previous intraocular surgery is relevant when assessing new flashes and floaters. AAO’s clinical guidance includes it among retinal-detachment risk factors. Bring the timing and details if available, together with any previous retinal laser or operations. New symptoms still need examination rather than being automatically attributed to the earlier procedure or to an old diagnosis. [14]
Yes; a serious retinal problem can present with visual symptoms rather than pain. AAO’s warning symptoms include new floaters, flashes and a curtain, so comfort does not establish that the retina is safe. Seek urgent advice for a new shadow or loss of sight, and do not use the absence of pain to delay assessment. [13]
It could, but a new or changed visual episode still needs appropriate advice. AAO distinguishes migraine-related shimmering or jagged patterns from flashes associated with vitreous traction. Describe the appearance, onset and whether one or both eyes are involved. New floaters, missing sight or a curtain should not be dismissed as migraine without an eye assessment. [13]
Dilation helps the examiner see the retina and look for a tear or detachment. AAO emphasises a dilated retinal examination for new flashes or floaters. The drops can temporarily blur vision, so arrange transport if needed and do not drive while sight is affected. A photograph or a normal central scan alone does not answer every peripheral retinal question. [14][12]
Gentle indentation can help the clinician inspect the far peripheral retina for a break. Nixon’s study found that some tears were visible only with an indented examination. Tell the examiner if you are uncomfortable or have difficulty cooperating. The aim is to assess areas that may not be adequately checked by a central retinal scan alone. [4]
No; OCT is useful for particular retinal questions, but a central scan does not replace assessment of the peripheral retina. AAO’s PVD guidance describes clinical examination and additional tests selected for the findings. If new flashes, floaters or a curtain persist, do not rely on an isolated reassuring scan instead of the examination and return advice. [3]
Further investigation and follow-up may be needed because the view is limited. AAO guidance includes ultrasound and repeat assessment in appropriate circumstances rather than assuming a hidden retina is normal. The urgency depends on the findings and risk. Ask what has been established, what remains unclear and which symptoms require immediate return before the planned review. [3]
The need and timing depend on the examination. AAO recommends review within 6 weeks for acute PVD with specified risk findings such as bleeding, pigment or visible traction, with prompt return for new symptoms. Some eyes need earlier assessment. Make sure you understand your own review plan rather than applying the same interval to every floater. [3]
No; HSE advises people with diabetes not to wait for their next screening appointment when vision changes. Bleeding or another retinal problem may need assessment outside that timetable. Screening and an acute symptom examination have different purposes. Seek urgent advice for a curtain, a sudden shower of spots or reduced vision, even after a recent reassuring screen. [2]
Usually not; Cambridge University Hospitals describes observation and return precautions for uncomplicated PVD. The symptoms may remain noticeable but often become easier to live with. That reassurance applies after a tear or detachment has been excluded. Report a new change rather than assuming that every later symptom is explained by the original uncomplicated examination. [11]
An acute symptomatic horseshoe tear usually needs treatment, according to AAO guidance. Laser or freezing may be used around a suitable break to reduce the risk of detachment. The clinician explains the finding, urgency and limitations. Treatment does not guarantee that no further break can occur, so follow-up and return precautions remain important afterwards. [3]
No; the decision depends on the lesion and clinical circumstances. Cochrane found no eligible trials establishing preventive benefit for asymptomatic breaks and lattice in its review, while AAO distinguishes those findings from acute symptomatic tears. An evidence gap for an asymptomatic lesion is not a reason to ignore a fresh tear with symptoms. Ask which situation applies. [5][3]
They may persist but become less noticeable; complete disappearance cannot be promised. Cambridge University Hospitals describes this common course after PVD. If symptoms remain intrusive after serious causes have been excluded, discuss their effect on reading or everyday tasks. A fresh increase, curtain or loss of sight needs reassessment rather than simply waiting for symptoms to fade. [11]
Laser vitreolysis can be discussed for selected cases, but it is not suitable for every floater or the same treatment used to seal a retinal tear. A small sham-controlled trial found improvement for selected Weiss-ring floaters and called for larger, longer studies. Discuss the diagnosis, possible benefit and risks rather than expecting a guaranteed or risk-free result. [7]
The cited Cochrane review did not establish which was better in a direct comparison. That question differs from whether laser performed better than a sham procedure in a selected trial. The review is older and does not prove that no later research exists. An elective procedure needs an individual discussion of visual impact, alternatives and potential harms. [6][7]
Follow the treating surgeon’s advice, particularly if a gas bubble was placed in the eye. NHS information warns that flying may need to be avoided while gas is present. This is different from uncomplicated PVD without surgery. Do not use another person’s recovery date or the fact that vision feels better as clearance to fly. [10]
