Blurry Vision: Causes and Solutions for Myopia and Astigmatism

Q: Blurry Vision: Causes and Solutions for Myopia and Astigmatism

Hello： Based on the detailed information you provided, the fluctuations in vision in your right eye may be caused by various factors. <br>Here are several possible reasons and recommendations：<br>1. <br>Eye Strain： Prolonged use of mobile phones and electronic devices can lead to

Blurred vision

Hello, Doctor.
I would like to inquire about my condition.
I have myopia of -4.75 and astigmatism of -0.50 / -3.50.
My vision in both eyes became blurry around January, and after an eye exam, my prescription increased.
However, I later underwent other tests, including OCT and dilated fundus examination, which showed that my optic nerve is normal, but the cup-to-disc ratio is slightly enlarged and needs to be monitored (the disc size is approximately 97/103 with a ratio of 0.6 and 0.7, though I might have forgotten some details).
After that, I took more breaks and reduced my screen time.
In recent months, my vision measurements have been around -4.25 to -4.50 / -3.00 to -3.25, indicating a decline in vision.
However, in the past few days, my right eye seems to be blurrier, especially when looking at small text up close, while distant vision is also blurry (I usually have a habit of checking by closing one eye, and this has become more noticeable today).
I just visited an optical shop and my new prescription was measured at -5.00 / -3.25 with astigmatism of -0.25.
I have been using my phone more than usual over the past couple of days and have also been taking medication for post-nasal drip.
Could these factors be affecting my vision? Additionally, I have been using artificial tears for dry eyes, but I have tried to reduce usage in the last couple of days to avoid dependency.
I would like to ask the doctor if the fluctuations in my right eye's vision could be due to other reasons (the dilated examination on April 5th showed no issues).

Hua Hua, 30~39 year old female. Ask Date: 2024/05/23

Dr. Gao Pilin reply Ophthalmology

Hello: Based on the detailed information you provided, the fluctuations in vision in your right eye may be caused by various factors.
Here are several possible reasons and recommendations:
1.
Eye Strain: Prolonged use of mobile phones and electronic devices can lead to eye fatigue, which may result in temporary blurred vision.
Reducing screen time and taking breaks every 20 minutes to look at something 20 feet away for 20 seconds can help alleviate eye strain.
2.
Dry Eye Syndrome: You mentioned that your eyes feel dry and that you are using artificial tears.
Dry eye syndrome can affect vision, especially after extended periods of use.
It is advisable to continue using artificial tears, but do not rely on them excessively, and maintain appropriate environmental humidity.
3.
Astigmatism Changes: Your recent eye exam indicated slight changes in astigmatism.
Variations in astigmatism can also affect the stability of vision, particularly when looking at distant objects.
4.
Medication Effects: Medications for post-nasal drip may cause dryness or blurred vision, which is a common side effect of certain antihistamines.
5.
Optic Nerve and Disc Condition: You mentioned that the cup-to-disc ratio is slightly enlarged, which requires regular monitoring to ensure there is no further deterioration.
Although recent dilation exam results were normal, it is still recommended to have regular eye check-ups to monitor any potential changes.
Recommendations:
1.
Moderate Rest: Continue to maintain reasonable eye habits and avoid prolonged use of mobile phones and computers.
2.
Use of Artificial Tears: Use artificial tears in moderation and maintain environmental humidity to alleviate dry eye symptoms.
3.
Regular Check-ups: Schedule regular visits to an ophthalmologist, especially to monitor the condition of the optic nerve and disc, ensuring there are no further changes.
4.
Medication Consultation: If you suspect that medications are affecting your vision, consult the prescribing physician to discuss alternative medications.

Reply Date: 2024/05/23

More Info

Hello! Thank you for your detailed inquiry regarding your vision issues, particularly concerning myopia and astigmatism. Based on the information you've provided, it seems that you are experiencing fluctuations in your vision, particularly in your right eye, which can be concerning. Let's break down the potential causes and solutions for your situation.

Understanding Myopia and Astigmatism
Myopia, or nearsightedness, occurs when the eyeball is too long or the cornea is too steep, causing light rays to focus in front of the retina. Astigmatism, on the other hand, is caused by an irregular shape of the cornea or lens, leading to blurred or distorted vision at all distances. Both conditions can lead to blurry vision, especially if they are not adequately corrected with glasses or contact lenses.

Possible Causes of Blurry Vision
1. Changes in Prescription: You mentioned that your prescription has changed recently. It's not uncommon for myopia to progress, especially in younger individuals or those who spend a lot of time on screens. If your vision has deteriorated from 475 to 425-450 in one eye, it may indicate that your myopia is worsening. Regular eye exams are crucial to monitor these changes.

2. Eye Fatigue: Increased screen time can lead to digital eye strain, which may cause temporary blurriness, discomfort, and dryness. Symptoms can be exacerbated by prolonged use of devices without breaks. It's essential to follow the 20-20-20 rule: every 20 minutes, look at something 20 feet away for at least 20 seconds.

3. Dry Eyes: You mentioned using artificial tears due to dryness. Insufficient tear production can lead to fluctuating vision, especially when focusing on small text or screens. If your eyes are not adequately lubricated, it can cause temporary blurriness.

4. Nasal Congestion and Medication: You noted that you have been taking medication for post-nasal drip. Some medications can cause side effects such as dry eyes or blurred vision. If you suspect this is affecting your vision, consult your healthcare provider about alternatives.

5. Underlying Conditions: Although your OCT and dilated eye exams showed normal results, the increase in your cup-to-disc ratio (0.6 to 0.7) suggests that your optic nerve should be monitored for potential glaucoma. Changes in the optic nerve can sometimes lead to visual disturbances.

Solutions and Recommendations
1. Regular Eye Exams: Continue to have regular check-ups with your eye doctor. Given the changes in your vision and the increase in your cup-to-disc ratio, it’s essential to monitor your eye health closely.

2. Update Your Prescription: If your vision has changed, you may need an updated prescription for your glasses or contact lenses. Ensure that your lenses are appropriate for your current level of myopia and astigmatism.

3. Manage Eye Fatigue: Reduce screen time where possible and take regular breaks. Ensure that your workspace is well-lit and that you are using proper ergonomics to minimize strain.

4. Hydration and Artificial Tears: Continue using artificial tears to combat dryness, but do so judiciously. If you find yourself relying on them too much, consult your eye doctor for recommendations on managing dry eyes.

5. Monitor Symptoms: Keep track of any changes in your vision, especially if you notice consistent blurriness or other symptoms. If your vision continues to fluctuate or worsen, seek immediate medical attention.

6. Consult a Specialist: If your symptoms persist despite following these recommendations, consider consulting a specialist, such as a neuro-ophthalmologist, to rule out any neurological causes for your visual disturbances.

In summary, while fluctuations in vision can be concerning, they are often manageable with appropriate care and monitoring. Stay proactive about your eye health, and don’t hesitate to reach out to your healthcare provider with any new or worsening symptoms. Your vision is invaluable, and taking steps to protect it is crucial.

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