Eyeglasses Fitting and Dry Eye Issues: Expert Insights

Concerns about glasses and dry eyes?

1.
Should I first visit an ophthalmologist for an eye examination before going to an optical store to get glasses, or can I go directly to the optical store? Is there a difference between the examination done by a doctor and that done at an optical store?
2.
If I look at a computer screen for one to two hours, my eyes start to feel dry, and after another one to two hours, my vision becomes blurry.
However, after resting or sleeping, my vision returns to normal.
What could be causing this? I found online that staring at a screen reduces the blink rate, leading to dry eyes, and that prolonged dryness can cause blurry vision.
Is this correct?

Mr. Wang, 20~29 year old female. Ask Date: 2016/05/20

Dr. He Jianxian reply Ophthalmology

1.
If you are looking to get prescription glasses, it is advisable to consult an ophthalmologist, as they can provide a more accurate prescription based on the patient's specific condition.
If you are not very familiar with optical shops, it is better to go directly to an ophthalmologist.

2.
Prolonged screen time can not only lead to unstable tear film but also cause fatigue, which can result in blurred vision.
It is recommended to take appropriate breaks while using the computer.

Reply Date: 2016/05/20

More Info

When it comes to fitting eyeglasses and addressing dry eye issues, it's essential to understand the processes involved and the underlying causes of discomfort. Let's break down your questions and provide insights based on medical knowledge.

1. Eyeglasses Fitting Process:
It is generally advisable to first visit an eye care professional, such as an optometrist or ophthalmologist, for a comprehensive eye examination before getting glasses. The reason for this is that an eye doctor can assess your overall eye health, check for any underlying conditions, and provide a precise prescription tailored to your specific needs. This examination often includes tests for visual acuity, refraction, and eye health assessments, which are crucial for determining the correct lens power and type.

On the other hand, while optical shops can perform refraction tests and provide prescriptions, they may not have the same depth of medical knowledge or equipment to detect potential eye health issues. Therefore, if you have any concerns about your vision or eye health, starting with an eye care professional is the best approach. After obtaining a prescription, you can then go to an optical shop to select frames and lenses that suit your style and comfort.

2. Dry Eyes and Visual Disturbances:
The symptoms you describe—dryness after prolonged screen time followed by blurred vision—are common among individuals who spend significant time looking at digital screens. This condition is often referred to as Computer Vision Syndrome (CVS) or Digital Eye Strain. When you focus on a screen, your blink rate tends to decrease, which can lead to insufficient lubrication of the eyes. This dryness can cause discomfort and may result in temporary blurred vision.

The reason your vision returns to normal after resting is that your eyes have a chance to rehydrate and recover from the strain. During sleep, your body naturally replenishes moisture in the eyes, which is why you may notice an improvement upon waking.

To mitigate these symptoms, consider the following strategies:
- Follow the 20-20-20 Rule: Every 20 minutes, take a 20-second break to look at something 20 feet away. This helps reduce eye strain and encourages blinking.

- Use Artificial Tears: Over-the-counter lubricating eye drops can help alleviate dryness and provide comfort during prolonged screen use.

- Adjust Your Workspace: Ensure that your computer screen is at eye level and about an arm's length away. Proper lighting can also reduce glare and strain.

- Stay Hydrated: Drinking plenty of water throughout the day can help maintain overall eye moisture.

In summary, starting with a thorough eye examination by a qualified professional is crucial for obtaining the right prescription and ensuring your eye health. Additionally, managing dry eyes and visual discomfort requires proactive measures, especially in our digital age where screen time is prevalent. If symptoms persist or worsen, it is advisable to consult with an eye care professional for further evaluation and tailored recommendations.

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