Shadows in Vision: Are They Caused by Sunlight or Eye Issues? - Ophthalmology

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It sounds like you're experiencing some concerning visual phenomena, particularly with the appearance of shadows or dark spots in your vision. Based on your description, it seems that you have a history of floaters in your left eye, and you've recently undergone a dilated eye exam that showed your retina was normal. However, the new symptoms you're experiencing, especially in bright sunlight at the beach or park, warrant further discussion.

Firstly, the phenomenon of seeing dark shadows or spots in your vision, especially in bright light, can often be attributed to a few different factors. One possibility is that what you're seeing is related to the floaters you already have. Floaters are tiny clumps of gel or cells inside the vitreous, the clear gel that fills the space between the lens and the retina of your eye. They can cast shadows on the retina, which is what you perceive as dark spots or shadows in your field of vision. Bright light, particularly sunlight, can make these floaters more noticeable, as the contrast between the light and the shadows they cast becomes more pronounced.

Another potential explanation for the shadows you're seeing could be related to the way your eyes are responding to bright light. When exposed to intense light, the pupils constrict to protect the retina, and this can sometimes lead to temporary visual disturbances. If you are focusing on a bright background, such as the sky or water, it may also cause your eyes to fatigue more quickly, leading to visual disturbances like the ones you're describing.

However, since you mentioned that these shadows appear to be stationary and do not move with your eye, it is essential to consider other possibilities. The fact that they disappear when you close your eyes and reappear when you open them could suggest that they are indeed related to the floaters or possibly a visual phenomenon known as a "visual migraine." This condition can cause temporary visual disturbances, including spots or shadows, but is usually not associated with pain.

Given your history of floaters and the recent changes in your vision, it is advisable to consult with an eye care professional. While your recent dilated exam showed a normal retina, any new or changing symptoms should be evaluated to rule out any potential issues, such as retinal tears or other conditions that could affect your vision. It’s always better to err on the side of caution when it comes to eye health.

In summary, while the shadows you're experiencing may be related to your existing floaters and the effects of bright sunlight, it is crucial to have a thorough examination to ensure there are no underlying issues. If these symptoms persist or worsen, or if you experience any additional symptoms such as flashes of light or a sudden increase in floaters, seek immediate medical attention. Your vision is invaluable, and taking proactive steps to protect it is essential.