Is It an Illusion or Floaters? Eye Symptoms - Ophthalmology

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Is it an illusion or floaters?


About a week ago, I seemed to see something flashing again, and sometimes I notice black spots in my field of vision (always at the periphery, not in the center), but they disappear in about 0.5 seconds.
I later had a fundus examination and OCT, which confirmed that there were no issues with my eyes.
I also had an MRI of my brain six months ago, but this situation still persists.
I have observed that when I am anxious or stressed, the symptoms occur more frequently, whereas when I exercise or play video games, the symptoms are almost absent.
In simple terms, the frequency of the symptoms increases significantly when I am nervous.
I am unsure if this is an illusion, a hallucination, or simply a case of floaters.

Hsuān, 20~29 year old female. Ask Date: 2024/03/06

Dr. Gao Pilin reply Ophthalmology


Hello: Based on the symptoms you described, I understand that you may have some visual issues, particularly in situations of stress or anxiety.
Although you have already undergone a fundus examination and OCT scan, I recommend that you consult an ophthalmologist again, especially to provide detailed information about the symptoms and conditions you are experiencing.
This may be related to issues with the retina or other components of the visual system, but considering your description of increased symptoms during anxious situations, psychological factors may also be involved.
Sometimes, anxiety and stress can lead to visual disturbances, which may be related to your symptoms.
In addition to an ophthalmological evaluation, you might also consider consulting a psychiatrist to further understand and address your anxiety symptoms.
They can help you cope with anxiety while potentially providing additional assessments regarding your symptoms.

Reply Date: 2024/03/06

More Info


When it comes to visual disturbances such as seeing flashes or floaters, it is essential to understand the underlying causes and the potential implications for eye health. Based on your description, it seems you are experiencing a combination of symptoms that could be related to floaters, visual illusions, or even anxiety-induced visual disturbances.

Floaters are tiny spots, lines, or cobweb-like structures that drift through your field of vision. They are usually caused by changes in the vitreous gel that fills the eye, which can become more liquid with age, leading to the formation of clumps or strands. While floaters are common and often harmless, they can sometimes indicate more serious conditions, especially if they are accompanied by flashes of light or a sudden increase in their number.

The flashes of light you mentioned could be a sign of the vitreous gel pulling away from the retina, a condition known as a posterior vitreous detachment (PVD). While PVD is generally not serious, it can sometimes lead to retinal tears or detachment, which are medical emergencies. Therefore, if you experience a sudden increase in floaters or flashes, or if you notice a shadow or curtain over your vision, it is crucial to seek immediate medical attention.

Your observation that these symptoms worsen with anxiety is also significant. Anxiety can lead to heightened awareness of bodily sensations, including visual disturbances. When you are anxious, your body goes into a fight-or-flight mode, which can amplify your perception of symptoms. Engaging in activities that distract you, such as exercise or gaming, may temporarily alleviate these symptoms because they redirect your focus away from your anxiety and visual disturbances.

Given that you have undergone thorough examinations, including an OCT and MRI, and no significant issues were found, it is likely that your symptoms are benign. However, it is essential to continue monitoring your symptoms and maintain regular check-ups with your eye care provider. If your symptoms persist or worsen, consider discussing the possibility of anxiety management strategies with a mental health professional. Techniques such as cognitive-behavioral therapy (CBT), mindfulness, and relaxation exercises can be beneficial in managing anxiety and its physical manifestations.

In summary, while your symptoms may be related to floaters or visual illusions, the influence of anxiety cannot be overlooked. It is advisable to maintain open communication with your healthcare providers about all your symptoms, including those related to anxiety, to ensure a comprehensive approach to your health. Regular eye exams are essential, and if you notice any new or worsening symptoms, do not hesitate to seek medical advice.

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