Today, modern tools to help people work and entertain such as TVs, computers, tablets, smartphones, … are very popular and almost indispensable in families. Regular use of electronic devices will definitely affect the health of our eyes.
This article provides some useful knowledge for you to minimize the impact of digital devices on eye health.
What are computer glasses?
Computer glasses (computer glasses) are eyeglasses specially designed for viewing computers, tablets and smartphones. Computer glasses are for near vision only, do not wear these glasses for driving or general use.
Computer glasses help reduce concentration stress caused by computer use, which can cause digital eye strain. Some computer glasses also shield your eyes from the blue light emitted by the screens of digital devices.
Why use computer glasses?
We often experience the signs and symptoms of Digital Eye Strain when looking at the screens of digital devices for long periods of time. Possible symptoms such as:
- vision Fluctuating vision
- eyes Dry eyes
- Tired eyes
- Tired eyes
- Double vision (seeing two images of the same object)
- Eye twitching Eye
Basically we shouldn’t look staring at a nearby object – like a glowing computer screen – for long periods of time. The ciliary body (this muscle controls the shape of the lens and adjusts the focus of the eye). This is also the cause of fatigue of the extraocular muscles surrounding our eyes (these muscles control and correct the position of the eyes). Fatigue of these muscles leads to discomfort and visual symptoms.
Using computer glasses can reduce the risk of eye muscle fatigue and discomfort caused by prolonged screen time. Some computer glasses also protect your eyes from potentially harmful blue light emitted by digital devices. There is much research now focused on determining whether long-term exposure to blue light from digital devices increases the risk of macular degeneration or other eye problems later in life. But apparently, laboratory studies have shown that blue light can damage the cells in the retina that are essential for vision.
How do computer glasses work?
Basically, computer glasses reduce how well your eyes focus when viewing digital devices. This can help for all ages and is especially helpful if you’re over 40. In our 40s, we begin to experience symptoms of presbyopia – an age-related inability to focus on near vision.
Computer glasses can also correct nearsightedness, farsightedness or astigmatism that you have. Research shows that even minor refractive errors that are not corrected in time can cause computer vision problems and reduced eye performance.
Computer glasses and reading
glasses Computer glasses have many differences with regular eyeglasses or reading glasses.
When using computers and digital devices, the screens of these devices should be about 20 to 26 inches away from our eyes for maximum comfort. This is considered “intermediate vision” – closer to driving vision (“far vision”), but farther away than reading vision (“near vision”).
If you are under 40 years old and wear prescription glasses, these glasses help you to see clearly at all vision distances. However, focusing on near- and intermediate-range objects still requires the ciliary muscle in the eye to work to adjust. The longer you stare at your computer and phone screens, this muscle and eyes get tired.
If you’re starting to have presbyopia, bifocals can improve near and far vision, but not intermediate vision (required for using computers and seeing smartphones). Multifocals and trifocals can help improve intermediate vision, but they often don’t have a large enough medial area for comfortable working with the computer. For these reasons, many people often use reading glasses to use the computer, but they also have limitations.
In general, computer glasses have about 60% magnification power compared to reading glasses. (The optimal magnification depends on how far you want to sit from your computer screen and how you hold your digital devices.)
The store-bought reading glasses that are available are often simply lenses. magnifying lens in a fixed frame.
On the other hand, a good computer glasses will do three things:
- Correct your refractive errors
- Provide optimal magnification for viewing your digital devices
- Protect your eyes from light blue
In addition, computer glasses can help locate the optical center of the lens just in front of your pupil when using a digital device. Regular reading glasses purchased at the glasses store do not correct the pupillary distance for medium vision like computer glasses do. In addition, store-bought reading glasses often offer little or no protection from blue light.
Made-to-order computer glasses can provide a wide and clear field of view when using your digital devices, reducing your concentration levels, and have the added benefit of blue light protection.
Lens design for computer glasses
Because these lenses are specifically designed for computer use, they are not suitable for driving or general use. They should be used exclusively when using computers and digital mobile devices.
computer glasses The simplest computer glasses with lenses that have the same optical power over the entire lens surface of the lens. These are called monofocal lenses. This lens power is customized for your specific needs and the computer viewing distance that suits you.
Monofocal computer glasses help reduce the risk of eye strain, blurred vision, and unnatural posture that can cause neck and back pain. They are comfortable for computer users of all ages.
Computer Lenses A multifocal computer lens is a multifocal lens that does not have an area separator. They are available in different capacities to suit your near, intermediate and far vision.
Multifocal computer lenses have a larger medial area than conventional multifocal lenses. This provides a wider view of your computer screen. However, these lenses have a smaller field of vision and are therefore not recommended for driving.
glasses Other lenses used for computer glasses include bifocal and trifocal lensesThese lenses have larger areas for medium and near vision than conventional bifocals and trifocals. In addition, the positions of the intermediate and proximal regions of these glasses are customized for computer use.
You should consult your Optometrist or Optometrist to help you decide on the best computer vision lenses for your needs.
Lens coatings and tinting
For maximum wearer comfort, computer glasses lenses must have an anti-reflective coating consisting of reflections from the front and back surfaces of the lenses to help reduce eye strain.
Blue light filters are another essential component to protecting your eyes from potentially harmful high-energy blue light emitted by digital devices. Essilor’s Eyezen lenses are an example of high-quality lenses with built-in blue light filtering for computer glasses.
Your ophthalmologist can also help advise you to add a light tint to your computer lenses to reduce glare from high-powered light.