Do Glaucoma Medications Cause Blurry Vision and Eye Fatigue? - Ophthalmology

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Glaucoma medications, including those you've mentioned like Timolol (舒壓坦) and Brimonidine (青眼露), can indeed lead to side effects such as blurry vision and eye fatigue. These medications are designed to lower intraocular pressure (IOP), which is crucial in managing glaucoma, but they can also affect the visual system in various ways.

1. Side Effects of Glaucoma Medications: Both Timolol and Brimonidine can cause side effects that may contribute to blurry vision and eye fatigue. Timolol, a beta-blocker, can lead to systemic absorption, potentially causing side effects such as fatigue and blurred vision. Brimonidine, an alpha agonist, may also cause transient blurred vision, dry mouth, and fatigue. These side effects can be particularly noticeable when starting a new medication or adjusting dosages. If you are experiencing significant discomfort or visual disturbances, it is essential to discuss these symptoms with your eye care provider, as they may consider adjusting your treatment regimen.

2. Blurry Vision and Astigmatism: The "blurry film" sensation you describe could be related to several factors. While it is not a direct symptom of glaucoma itself, it can occur due to the medications or the underlying condition. Astigmatism, which is a common refractive error, can cause blurred vision and may be exacerbated by eye fatigue. If your eyes are strained from prolonged reading or screen time, this can lead to a feeling of fatigue and discomfort, which might be perceived as a "film" over your vision. It is advisable to have a comprehensive eye exam to assess your refractive error and determine if corrective lenses might help alleviate these symptoms.

3. Intraocular Pressure (IOP) Control: The target IOP for glaucoma patients can vary based on individual risk factors, including the severity of the disease and the presence of other ocular conditions. Generally, an IOP of 18-21 mmHg is considered within the normal range, but for many glaucoma patients, especially those with a history of higher pressures, a lower target may be recommended. Your current IOP of 18-19 mmHg suggests that your pressure is well-controlled, but it is crucial to monitor for any changes in your condition or symptoms.

In summary, while your medications can contribute to blurry vision and eye fatigue, these symptoms can also arise from other factors such as eye strain or refractive errors. It is essential to maintain open communication with your eye care provider about your symptoms, as they can help determine the best course of action, which may include adjusting your medications, recommending vision correction, or exploring other treatment options. Regular follow-ups are vital in managing glaucoma effectively and ensuring that your vision remains stable.