Visual Disturbances: Are They Related to Floaters? - Ophthalmology

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Visual disturbances can be quite concerning, especially when they manifest as unusual sensations or perceptions. Based on your description, it seems you are experiencing phenomena that could be related to floaters, but there are several factors to consider.

Floaters are tiny specks or strands that float in your field of vision, often more noticeable when looking at a bright background, such as a clear sky or a white wall. They are caused by changes in the vitreous humor, the gel-like substance that fills the eye. As we age or in cases of high myopia (nearsightedness), the vitreous can become more liquid, leading to the formation of floaters. When you mention seeing "water waves" or "the sensation of fan blades turning," this could indeed be related to the movement of floaters within your vitreous. These floaters can cast shadows on the retina, leading to the perception of movement or distortion, especially when your gaze shifts or when you are not focusing intently on a specific object.

The phenomenon you describe when you close your eyes and see a flickering or flashing sensation, akin to a television with no signal, is also noteworthy. This could be related to a few different factors. One possibility is that it is a form of visual snow or phosphenes, which are perceived flashes of light that can occur without external stimuli. This is often benign but can be exacerbated by fatigue, stress, or even certain visual conditions.
In your case, the fact that these sensations disappear when you focus on them suggests that they may not be directly linked to floaters but rather to the way your brain processes visual information. When you are not actively focusing, your brain may interpret random signals from the visual system as patterns or movements, which can create the illusion of waves or flickers.

It is also essential to consider the context of your symptoms. If you have a history of high myopia, you may be at a higher risk for retinal issues, including retinal tears or detachments, which can also cause visual disturbances. If you experience any sudden changes in your vision, such as an increase in the number of floaters, flashes of light, or a shadow or curtain effect in your peripheral vision, it is crucial to seek immediate medical attention.

In summary, while your symptoms could be related to floaters, they may also stem from other benign visual phenomena. However, given your history of high myopia and the nature of your symptoms, it is advisable to have a thorough eye examination by an ophthalmologist. They can assess the health of your retina and vitreous and provide you with a clearer understanding of your visual disturbances. Regular check-ups are essential, especially if you notice any changes in your vision, to ensure that any potential issues are addressed promptly.