Floaters: Causes, Symptoms, and Eye Strain Concerns - Ophthalmology

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Hello! Thank you for your inquiry regarding floaters and their relationship with eye strain. Floaters, or "muscae volitantes," are small spots or strands that drift through your field of vision. They are typically caused by changes in the vitreous humor, the gel-like substance that fills the eye, as it ages and becomes more liquid. This process can lead to the formation of clumps or strands that cast shadows on the retina, which you perceive as floaters.

Your experience of seeing an increase in floaters, particularly after prolonged reading or computer use, is not uncommon. It is important to note that while floaters can be a normal part of aging, their sudden increase or change in appearance can sometimes indicate a more serious condition, such as retinal detachment or a tear. However, since you recently underwent a dilated eye exam and your retina was found to be healthy, it seems that your floaters are likely benign.

The phenomenon you described—seeing more floaters after reading for an extended period—could indeed be related to eye strain. When you focus on text for a long time, especially in poor lighting or without taking breaks, your eyes can become fatigued. This fatigue may make you more aware of existing floaters, or it may exacerbate their visibility. Eye strain can also lead to symptoms such as dryness, discomfort, and blurred vision, which can further complicate your visual experience.

Regarding your question about reading and its similarity to using electronic devices, both activities can contribute to eye strain if done excessively without breaks. The recommendation to limit screen time to about three hours is a guideline to help prevent digital eye strain, which can manifest as discomfort, dryness, and visual disturbances. Reading, especially in low light or for extended periods, can similarly lead to fatigue. It is advisable to take regular breaks, practice the 20-20-20 rule (every 20 minutes, look at something 20 feet away for 20 seconds), and ensure proper lighting while reading.

In summary, while your experience with floaters is likely normal, the increase in their visibility after prolonged reading could be linked to eye strain. It is essential to manage your screen time and reading habits to minimize discomfort. If you notice any sudden changes in your floaters or experience other symptoms such as flashes of light or a shadow in your peripheral vision, it is crucial to seek immediate medical attention. Regular eye exams are also important to monitor your eye health, especially as you age or if you have underlying conditions that may affect your vision.
If you have further questions or concerns, please do not hesitate to reach out to your eye care professional for personalized advice and recommendations.