Has anyone else experienced a noticeable increase in floaters in the eyes? I'm 58, have been diagnosed hypothyroid for nearly 10 years and have been on 37.5mcg T4 and 30mcg T3 daily for nearly 2 years. The combo is a vast improvement on the T4 only treatment and I feel fine on it. I do suffer with blurred vision and have to wear reading glasses, but I recently experienced some large floaters and flashing lights in my right eye. I went to see the optician who carried out a thorough investigation (including the drop-induced dilation of the pupil) and told me that these floaters were quite normal and age-related (and just unfortunate that they were in the centre of my eye where they were so much more noticeable...) but that I needed to be vigilant of the flashing as this could be a sign that the retina was being damaged. The flashing, thankfully has not repeated itself in that eye, but I've now noticed that these events have started happening in my left eye too. Could this be something that is related to either the hypo state or the medication, i.e. over- or under- medication?