Floaters and Temporary Visual Disturbances in Myopia - Ophthalmology

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Hello! Thank you for your question regarding floaters and temporary visual disturbances, especially in the context of high myopia. It's important to understand that high myopia can lead to various visual phenomena, including floaters and other transient visual disturbances.

Floaters, or "myodesopsia," are small spots or strands that drift through your field of vision. They are typically caused by changes in the vitreous humor, the gel-like substance that fills the eye. In individuals with high myopia, the vitreous can undergo changes more rapidly due to the elongation of the eyeball. This can lead to the formation of floaters, which are often more noticeable against bright backgrounds or when looking at a clear sky.

The phenomenon you described, where you experience a temporary increase in floaters after blowing your nose, could be related to changes in intraocular pressure or the movement of the vitreous gel. When you blow your nose, the pressure in your head and eyes can change momentarily, which might cause the vitreous to shift slightly, leading to a temporary increase in the visibility of floaters. This is not uncommon and can happen to individuals without any underlying eye conditions as well.

The "Scherer phenomenon" you mentioned, which refers to a temporary visual disturbance characterized by a sudden increase in floaters or flashes of light, can also occur in some individuals. This phenomenon is often benign and can be triggered by various factors, including changes in pressure, physical exertion, or even stress. In your case, it seems to be a transient event that resolves quickly after the action of blowing your nose.

While these occurrences can be alarming, especially for someone with high myopia, they are often benign. However, it is crucial to monitor your symptoms. If you experience a sudden increase in floaters, flashes of light, or any changes in your vision that persist, it is essential to seek an eye examination. This is particularly important for individuals with high myopia, as they are at a higher risk for retinal issues, including retinal detachment.

In summary, the temporary increase in floaters you experience after blowing your nose is likely a benign phenomenon related to changes in intraocular pressure or vitreous movement. However, maintaining regular eye examinations is vital, especially given your history of high myopia and floaters. If you have any concerns or if your symptoms change, do not hesitate to consult with your eye care professional for further evaluation. They can provide personalized advice and ensure your eye health is monitored appropriately. Thank you for your question, and I hope this information helps clarify your concerns!