Black Shadows and Flashes in Your Vision: Is It Normal? - Ophthalmology

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Experiencing black shadows and flashes in your vision can be concerning, especially for someone who has a history of floaters (known as "myodesopsia" in medical terms). Based on your description, it seems that you are experiencing symptoms that could be related to your existing condition of floaters, but there are several factors to consider.

Firstly, floaters are typically caused by changes in the vitreous gel that fills the eye. As we age, the vitreous can become more liquid and may pull away from the retina, leading to the perception of floaters and flashes of light. These flashes, often described as "lightning streaks" or "flashes," occur when the vitreous gel tugs on the retina. This is a common phenomenon and is usually benign, especially if there are no accompanying symptoms such as a sudden increase in floaters, a shadow in your peripheral vision, or a curtain-like effect over your vision, which could indicate a retinal tear or detachment.

In your case, since you recently underwent a dilated eye exam and your doctor found no significant issues, it is likely that the symptoms you are experiencing—such as seeing white light or black shadows when closing your eyes—are related to the floaters and the natural changes occurring in your vitreous. The transient nature of these symptoms, especially if they resolve quickly, is generally a good sign. However, the fact that you are noticing these phenomena more frequently or with increased intensity could warrant further observation.

It's important to note that while floaters are common and often harmless, any new or worsening symptoms should be taken seriously. If you notice an increase in the frequency or intensity of the flashes, or if you experience any new visual disturbances, it is advisable to return to your eye care professional for a follow-up examination. They may perform additional tests to ensure that there are no underlying issues, such as retinal tears or detachments, which can be serious.

In summary, while your current symptoms may be consistent with your existing floaters, it is essential to remain vigilant. If you experience any changes in your vision, especially those that are sudden or severe, seek medical attention promptly. Regular eye exams and open communication with your eye care provider are key to managing your eye health effectively. Remember, your peace of mind is important, and addressing any concerns with your healthcare provider is always a good practice.