Changes in Visual Brightness After Using Digital Devices - Ophthalmology

More Info

---

When using digital devices for extended periods, many individuals experience various visual phenomena, including changes in brightness and color perception. The symptoms you describe—such as a decrease in color vibrancy and an increase in surrounding brightness—can be attributed to several factors related to visual fatigue, eye strain, and the physiological responses of the eyes to prolonged screen exposure.


Visual Fatigue and Eye Strain
One of the primary reasons for the changes in your visual perception after using digital devices is visual fatigue, often referred to as digital eye strain or computer vision syndrome. This condition arises from the prolonged use of screens, which can lead to discomfort and temporary changes in vision. Symptoms can include blurred vision, dry eyes, headaches, and changes in color perception.
When you focus on a screen for a long time, your eye muscles can become fatigued. The ciliary muscles, which control the lens's shape for focusing, may tire from constant adjustment, leading to a temporary inability to perceive colors as vividly. This fatigue can also affect how your brain processes visual information, resulting in a sensation of dullness in colors and brightness.


Contrast Sensitivity
Another factor at play is contrast sensitivity, which is the ability to distinguish objects from their background. Extended screen time can reduce contrast sensitivity, making colors appear less vibrant and details harder to discern. This is particularly noticeable when transitioning from a bright screen to a dimmer environment or vice versa. The eyes may struggle to adjust to the different lighting conditions, leading to a perception of washed-out colors or increased brightness in the periphery.


Blue Light Exposure
Digital devices emit blue light, which can contribute to visual discomfort and fatigue. Blue light exposure can disrupt the natural circadian rhythm and lead to increased eye strain. Some studies suggest that blue light may also affect how we perceive colors, potentially leading to a temporary alteration in color perception after prolonged exposure.


Recommendations for Relief
To mitigate these symptoms, consider the following strategies:
1. Follow the 20-20-20 Rule: Every 20 minutes, take a 20-second break to look at something 20 feet away. This helps relax the eye muscles and reduces fatigue.

2. Adjust Screen Settings: Ensure that your screen brightness is comfortable and matches the ambient lighting. A screen that is too bright or too dim can contribute to eye strain.

3. Use Proper Lighting: Avoid glare from windows or overhead lights. Position your screen to minimize reflections, and consider using anti-glare screens.

4. Blink Regularly: People tend to blink less when staring at screens, leading to dry eyes. Make a conscious effort to blink more often to keep your eyes moist.

5. Consider Blue Light Filters: Many devices now come with blue light filtering options, or you can use glasses designed to block blue light. This may help reduce eye strain and improve comfort during prolonged use.

6. Regular Eye Exams: If you continue to experience these symptoms, it may be beneficial to consult an eye care professional. They can assess your vision and recommend appropriate corrective measures, such as glasses specifically designed for screen use.


Conclusion
The changes in visual brightness and color perception you experience after using digital devices are likely due to a combination of visual fatigue, contrast sensitivity issues, and the effects of blue light exposure. By implementing some of the strategies mentioned above, you can help alleviate these symptoms and maintain better visual comfort during and after screen use. If symptoms persist, seeking professional advice is always a good idea to rule out any underlying conditions.