Why do I see ‘flashing lights’ and ‘floaters’ in my eyes?
As the eye ages, the vitreous gel (jelly like substance in the eye) becomes less solid. As the vitreous gel undergoes this degeneration, parts of the vitreous cast shadows on the retina and are seen as ‘floaters’. This is a normal ageing process and is generally benign. Blood, pigment and inflammatory cells can also result in floaters.
‘Flashing lights’ are another common symptom arising from the interaction between the vitreous and the retina. When the degenerating vitreous gel pulls in the retina, this mechanical stimulation can give rise to the sensation of flashing lights.
Although ‘floaters’ and ‘flashing lights’ are most often caused by vitreous degeneration as described above, they can also indicate the presence of retinal tears and detachments.
In the case of retinal detachments, the sensation of a “curtain” blocking out part of a person’s vision ,accompany ‘floaters’ and ‘flashing lights’.
When is it necessary to seek consultation?
Any new onset or sudden increase in the number of ‘floaters’, with or without ‘flashing lights’, should prompt a consultation with an eye specialist. If the symptoms are accompanied by a decrease in vision or a “curtain” blocking part of the vision, urgent consultation is required. The purpose of examination is to exclude retinal tears and detachments as a cause of the symptoms as these conditions are potentially blinding.
What treatment is there?
No treatment is required if ‘floaters’ or ‘flashing lights’ are caused by vitreous degeneration. These symptoms may become less obvious or disappear with time. If there is a retinal tear or detachment, laser treatment or surgery will be necessary.