Expect symptoms to reverse themselves within several months of delivery or after you finish breastfeeding. If you do experience any vision changes during pregnancy, they will almost always be minor and temporary. The most common vision change during pregnancy – blurry vision – is usually linked to changes in the cornea and occurs mainly in the second and third trimesters. When does blurry vision in pregnancy begin? Combined with subtle changes in the shape and thickness of the cornea, you may find it's uncomfortable to wear contact lenses, especially hard lenses. Hormonal changes can also make your eyes drier and more irritated during pregnancy (and for as long as you're breastfeeding), which can contribute to inaccurate vision. It's also the reason laser eye surgery isn't recommended during pregnancy, and why it's not a good time to be fitted for new contact lenses or invest in a new pair of glasses. It's a small change, but it could affect whether your glasses or contacts still correct your vision perfectly – or cause your vision to look blurry even if you didn't need glasses before pregnancy. If a retinal tear is present however, early laser treatment to seal the hole may prevent retinal detachment.Water retention, in particular, may slightly increase the thickness and curvature of your cornea. Treatment of flashes Flashes do not need any treatment if there is no tear of the retina. Possible complications include: retinal detachment, cataract formation, glaucoma and loss of vision. Because the complications of vitrectomy can be serious, vitrectomy surgery is recommended only in unusual cases. The vitreous is removed and replaced with a clear salt solution. Large and persistent floaters that interfere with vision can be removed from the eye with an operation called vitrectomy. For most people, treatment is not necessary. Treatment of floaters and flashes Floaters are usually not harmful. This may blur your vision so you may need to make arrangements for someone to drive you home after the examination. During the examination your pupils will be dilated using eye drops. While not all floaters and flashes are serious, you should always have your eyes examined by an ophthalmologist to make sure there has been no damage to your retina. What should you do if you experience floaters or flashes? Floaters and flashes become more common as we get older. Sometimes this is followed by a migraine headache. Patients may experience flashing lights that appear as jagged lines or ‘heat waves’ often lasting 10-20 minutes. Migraine Ophthalmic migraine results from spasm of the blood vessels that supply the eye or the visual areas of the brain. This is called a retinal detachment and requires an operation to repair it. When a tear occurs in the retina, the retina can fall off the back of the eye. This can cause slight bleeding into the eye which may be seen as a ‘shower’ of new floaters. Sometimes the vitreous is more firmly attached to the retina and pulls away a piece of the retina as it shrinks. In most cases, the large floater disappears over time. Torn retina When a posterior vitreous detachment occurs, a large floater and multiple flashes are usually seen. They can occur off and on for several weeks or months. They may last for a few seconds or several minutes. They are usually seen at night or in low light conditions. You may see what appears to be flashing lights or lightening streaks. What causes flashing lights? As the vitreous shrinks and comes away from the back of the eye, it can pull on the retina causing some of the retinal cells to fire off. Floaters are sometimes caused by bleeding or inflammation in the eye. In some cases, floaters can interfere severely with vision. While annoying, they are usually harmless and come and go over the years.
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