Flashing Lights and Shadows in Your Vision: Causes and Concerns - Ophthalmology

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Hello! Thank you for your question regarding the flashing lights and shadows in your vision, especially in the context of your recent diagnosis of iritis (inflammation of the iris). It's understandable to be concerned about these new symptoms, particularly when they involve changes in your vision.

First, let's clarify what you are experiencing. Flashing lights and shadows in your vision can be attributed to several causes, and understanding these can help alleviate some of your concerns. In your case, the intermittent flashes of light you are seeing could be related to a few different factors.

1. Flashes of Light: These are often caused by the vitreous gel in the eye pulling on the retina. This is a common phenomenon, especially in individuals who have had changes in their vitreous, such as those with myopia (nearsightedness) or those who are experiencing age-related changes. The flashes you describe may not be directly related to your iritis but rather to the natural aging process of the eye or the effects of the medications you are using.

2. Persistent Shadows: The shadows or moving spots you are experiencing could be a manifestation of floaters, which are small clumps of gel or cells inside the vitreous that cast shadows on the retina. These can be more noticeable in certain lighting conditions or when looking at a bright background. The fact that you notice them more when your other eye is closed suggests that they are indeed related to the vitreous and not necessarily a direct complication of your iritis.

3. Iritis and Its Complications: While iritis itself can lead to various visual disturbances, it typically does not cause flashes of light or persistent shadows. However, if the inflammation is severe or if there are complications such as increased intraocular pressure or secondary effects on the retina, it could potentially lead to visual symptoms. Since your doctor has checked your retina and found no issues, it is less likely that your current symptoms are directly due to the iritis.

4. Medication Effects: The medications you are using, particularly the dilating drops (mydriatics), can cause temporary changes in your vision, including blurred vision and sensitivity to light. These effects can sometimes lead to visual disturbances that might be interpreted as flashes or shadows. If you feel that the symptoms are worsening or not improving, it would be wise to discuss this with your eye care provider.

5. When to Seek Further Evaluation: Given that you have a history of iritis and are experiencing new visual symptoms, it is important to monitor these changes closely. If the flashes become more frequent, if you notice a significant increase in the number of floaters, or if you experience any loss of vision, you should seek immediate evaluation from your eye doctor.
In summary, while the symptoms you are experiencing could be concerning, they may not necessarily indicate a serious complication of your iritis. It is essential to maintain open communication with your healthcare provider about your symptoms and any changes you notice. Regular follow-up appointments will help ensure that any potential issues are addressed promptly. Remember, your vision is crucial, and any new or worsening symptoms should always be evaluated by a professional. Take care, and I wish you a smooth recovery!