Screen Time Effects on Eyes: Causes & Prevention

What Excessive Screen Time Does to Your Eyes?

Can screens damage your eyes? In this digital age, we are constantly using screens, whether for work or just for entertainment. All of this has become very common today, but excessive screen time or consistent exposure to blue light may damage your visual health. So, does screen time affect vision? Let’s understand how.

• Myopia: Myopia (also known as nearsightedness) is a vision problem in which nearby objects appear clear, but distant objects look blurry. Excessive use of screens has been linked to myopia among people of all ages, and especially among adults who have a history of it.

• Dry eye syndrome: Looking at the screen continuously can reduce the blink rate and prevent tears from coating the eye effectively. This can result in itching, a burning sensation, and cause dry eye syndrome.

• Asthenopia: Also known as eye strain or eye fatigue, it is caused by prolonged use of the eyes. Screens contain thousands of pixels on which your eyes continuously focus and refocus. Uneven contrast or brightness causes your eyes to work harder, increasing strain.

• Low pupil flexibility: Focusing on a fixed distance continuously hampers your eye’s ability to quickly adjust and shift focus between near and far objects. Focusing on nearby objects for a longer period can cause your eye muscles to lock up and reduce flexibility.

• Headache and neck pain: Harsh lighting, improper postures, and long hours of screen time can increase muscle tension and cause headaches and neck pain.

Real Causes of Screen-Induced Eye Strain

Screen-induced eye strain is caused by a combination of physical and environmental factors. Prolonged screen use is obviously the primary reason, but there are a few more. Other causes include:

• Poor Ergonomics: Poor ergonomics, like Incorrect alignment of the screen with your eyes and poor body posture, are two of the major causes of screen-induced eye strain. Improper positioning of the screen can cause eye fatigue, and improper visual angle can make the eye muscles work harder.

• Reduced blink rate: Blinking is crucial for your eye health as it lubricates the eye, washes away irritants, and protects the cornea. Your blink rate reduces significantly when you are focusing on a screen compared to normal times, which leads to dry eyes.

• Continuous refocusing: When you are looking at a screen, your eyes are consistently focusing and refocusing on tiny pixels of the screen. This constant focusing of your eyes leads to eye strain.

• Poor lighting: Poor lighting of the room can cause screen-induced eye strain, as it forces your eye muscles to contract and makes it difficult for your eyes to focus. This leads to discomfort, blurry vision, and headache.

Symptoms of Digital Eye Strain

Staring at the screen continuously for hours can cause eye fatigue and lead to symptoms. It is best to manage these symptoms as early as possible, as ignoring them can worsen the condition and damage your eyes. Symptoms consist of dryness and irritation of the eyes due to a significantly reduced blinking rate when using the screen constantly. You may also experience a burning sensation or soreness because of ocular surface irritation. Temporary blurring of the vision, especially when looking away from the screen after its constant use, is also a sign of digital eye strain. Apart from these, increased sensitivity towards light, frequent headaches, and eye redness are also classified as symptoms of digital eye strain.

Simple and Practical Ways to Protect Your Eyes from Damage

Reducing overall screen time is obviously the best way to protect your eyes from damage. But even if you reduce your phone screen time, you still have to look at screens for work, which you cannot avoid. Here are a few ways through which you can protect your eyes from damage.

The 20-20 Rule

The rule is simple: after every 20 minutes of continuous screen time, take a break of 20 seconds and look at something 20 feet away. This relaxes the eye’s ciliary muscles, which stay contracted when you are focusing on a screen. Taking a break and looking at something else also increases blinking rate and restores natural moisture, which was depleted from constantly looking at the screen.

Use Eye Drops

As discussed earlier, high screen time can significantly reduce your blinking rate and cause your eyes to dry. Using over-the-counter eye drops helps restore moisture by replacing artificial tears with natural tears that evaporate very quickly. Lubricating the eyes alleviates itching and burning sensations and also reduces digital eye strain.

Get Computer Glasses

They are specially designed to reduce digital strain and eye fatigue. These glasses are developed with blue light filtering technology and anti-reflective coatings. If you are using basic prescription glasses, they may not be suitable for long hours of screen time. Even if your eyesight is perfect, your doctor may recommend that you wear these glasses to prevent damage from prolonged screen use.

Ergonomic Positioning

Setting up your computer or laptop ergonomically can help prevent eye strain. Sitting close to the screen or aligning it at an incorrect angle can cause strain on the retina and cornea. Position the screen 20 to 28 inches away from your face and tilt it slightly upwards. The top of the screen should be right below your eye level so that your eyelids can cover more surface and keep your eyes lubricated. Sit straight and do not lean forward.

Adjust Room Lighting and Screen Settings

To reduce eye strain, it is crucial to have the right balance between screen brightness and ambient room light. Match the screen’s brightness to the room’s lighting, reduce it if it looks like a light source, and increase it if it is too dim to read. Use dark themes and modes to reduce overall light emission. Use ambient and soft light in the room to maintain consistent lighting.

Conclusion

With the growing digitization and everything moving online, the average human time spent on screens is increasing at an alarming rate. Prolonged use of the screen can lead to myopia, asthenopia, dry eye syndrome, low pupil flexibility, and headache. Factors like improper ergonomic settings, reduced blinking rate, and poor lighting can lead to ocular discomfort. Follow the above-mentioned tips to protect your eyes and manage the symptoms.

We hope you now have a better answer to the question, “Do screens damage your eyes?” Before concluding, we advise you to visit a doctor if the symptoms are frequent and progressively worsening, so you can take preventive measures and prevent further damage.