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Tag: computer lenses

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ESSILOR CRIZAL PREVENCIA

Essilor Crizal Prevencia is known as a no-glare lens that helps to filter harmful Ultra-Violet (UV) and unwanted blue light into the eyes to prevent long term damage. This lens helps to filter out the unwanted blue light from 415 to 455 nm wavelength. 

Computer screens, smartphones, tablets and the sun which is actually the largest source of blue-violet light will damage our eyes by causing eye strain or tired eyes leading to tearing and redness of the eyes.

Essilor Crizal Prevencia

Not all blue lights are harmful to us, blue turquoise from 465 to 495nm are the beneficial blue light which helps individual regulate their sleep cycle, mood and cognitive performance 

Essilor Crizal Prevencia

Benefits of Essilor Crizal Prevencia 

  • Crizal Prevencia does not cut off the beneficial blue light which is the 480nm wavelength 
  • It does not suppress melatonin, the chemical that regulates the sleep/wake cycle.
  • Crizal Prevencia is proven to block or filter out harmful blue-violet light by 15% to 20%
  • Crizal Prevencia has an Eye-Sun Protection Factor (E-SPF) of 25, which means 25x times more UV protection for your eyes compared to wearing no lens at all.
  • Crizal Prevencia is a clear lens which is not a yellowish coated blue filter lenses

So what is Blue Light? 

Essilor Crizal Prevencia

The Visible Light Spectrum is an electromagnetic radiation spectrum visible to the human eye and blue light is the part of the visible light spectrum that contains the highest energy. Because of its high energy, blue light has more potential to cause harm to the eye than other visible light. Within the entire visible light spectrum, blue light has the shortest wavelength which is from 380nm to 500. 

Blue Light is categorized into subgroups 

  • Violet Light ( 380nm – 410nm )
  • Blue-Violet Light (410nm – 455nm ) 
  • Blue-Turquoise Light ( 455nm – 500nm ) 

With high energy, Violet and Blue – Violet rays are harmful to the human eyes. Blue –Turquoise light ray, on the other hand, has less energy and helps in maintaining a healthy sleep cycle which is also known as beneficial Blue Light.

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20-20-20 Rule – How to prevent eye strain?

The 20-20-20 Rule

Movement Control Order caused by the Pandemic, had us all lock down at home for weeks even months. Besides spending quality times with family due this pandemic, I believe that the digital world stay with us most of the time too.

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Essilor Blue UV Capture

Essilor Blue UV Capture Lens

Essilor Blue UV Capture lens introducing new lenses with the advance combination  of molecular technology into the core of the lens, known as the Essilor Blue UV Capture, it efficiently filter out harmful blue-violet light, allowing only the blue-turquoise light pass through.

blue light lenses

Computer devices, gadgets and all other VDU devices are the main emission of blue light. Based on studies, blue light entering human eyes help in boosting attention, reaction and mood during the day. However, the blue light can cause damage to the retina. Blue light has the shortest wavelength and contains the highest energy in the visible light spectrum, it can cause eyestrain, headaches, and including macular degeneration after long exposure.

Essilor blue capture lens

Essilor Blue UV Capture lens provides a feature of blocking at least 20% of harmful blue-violet light, up to 3 times more protection against harmful blue-violet light than regular prescription lenses.

Harmful blue light

Ordinary blue cut lens usually appear yellowish, giving a less cosmetic feature and lack of natural colour. This is due to cutting blue light leads to a yellow residual tint on lens. According to physics, blue and yellow belongs to complementary colours, when blue light is absorbed, the yellow as the other complementary colours will appeared. In order to remove the yellow tint appearance, Blue UV Capture is added with a colouring agent that neutralize the yellow residual tint for creating a optical clear lens.

blue protect lens

1.Is Blue UV Capture protects under UV radiation other than blue light?

Yes. Blue UV Capture provides 100% UV protection as it filters out harmful violet light spectrum this includes UV-rays emits from the hot sun.

2. What is the difference between Blue UV Capture and normal blue filter lens?

Blue UV Capture is the new molecular technology material used to build the lens, is inside the lens, while blue filter is only the coating on the surface of the lens.

3. Why blue light is not 100% filter?

Not all the blue light is harmful. Filtering all the blue lights will affect the natural colour as it lost the blue colour. Blue light is distinguished into blue-violet and blue turquoise. Blue-violet belongs to high energy harmful wavelength  in the light spectrum, which are harmful to the eyes, filtering it and left over the harmless blue turquoise light preserve the natural vision with consists blue colour.

4. Is Blue UV Capture available on all types of lenses?

It is available on certain types of lenses belongs to Essilor, this includes single vision lenses, multifocal lenses, and myopia management lenses.

5. Is Blue UV Capture effective on eye problems cause by increasing near work task besides facing computer or gadgets use?

Blue UV Capture lens technology aimed for the functional use on reducing harmful blue light entering the eyes, reduce the risk on causing damage to the retina. However, eyestrain cause by increasing near work task (not by VDU devices) may comes from individual eye conditions, this includes the individual might be having eye condtions such as presbyopia, accommodative insufficiency, or eye muscle spasm.

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Adakah kanta penapis cahaya biru baik untuk mata?

Kanta penapis cahaya biru adalah pilihan yang baik untuk menyaring sinar biru yang berbahaya. Cahaya biru adalah salah satu cahaya yang dapat dilihat dari spektrum cahaya. Cahaya biru mempunyai frekuensi pendek, sehingga menghasilkan daya hidup yang lebih tinggi. Kajian menunjukkan bahawa, setelah beberapa lama, pengenalan warna biru pada cahaya boleh menyebabkan kerosakan jangka panjang pada mata anda. Cahaya biru mempunyai panjang gelombang antara lebih kurang 380nm dan 500nm; menjadikannya salah satu panjang gelombang tenaga terpendek dan tinggi.

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computer vision syndrome

Computer Vision Syndrome

Since the year of 2009, research indicates that computer use has taken the place of radio as the No. 2 media activity. The increased use of computers has reflected on the development of visual discomfort and related symptoms occurring in relation to computer use.

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kids and computer

KIDS COMPUTER VISION

KIDS COMPUTER VISION

Kids computer vision

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In the world of Internet and smartphones, kids are more connected than ever. The latest survey showed that over 90% of kids in the world uses a computer.

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As computers extensively becomes part of our lives, so does the high exposure of blue light from our monitors / smartphone screens.

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The advent of blue-light is that the wave-length can seep through the anterior anatomy of your eye and goes directly to your retina. Increased exposure evidently cause numerous symptoms.

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Prolong exposure give rise to eye-strain, due to increased retina bleaching and harmful absorbent of the blue wave-length.

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Constant eye-strains will lead to headaches. Kids with regular headaches tend to be cranky and will try to dissociate themselves from school work or assignment.

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Blue-light wave-length has proven to cause insomnia or the inability to get good sleep. Kids may suffer at school or their daily functions.

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And hence, they may exhibit complaints such as lack of focus and tiredness from time to time.

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With a risk of myopia progression especially with long hours of computer usage.

Come to Malaya Optical to have your kids vision examined by our licensed optometrist.

Keywords:

Kids and computer vision

Definition:

Computer Vision Syndrome, also referred to as Digital Eye Strain, describes a group of eye and vision-related problems that result from prolonged computer, tablet, e-reader and cell phone use. Many individuals experience eye discomfort and vision problems when viewing digital screens for extended periods. The level of discomfort appears to increase with the amount of digital screen use.

The most common symptoms associated with Computer Vision Syndrome (CVS) or Digital Eye Strain are

  • eyestrain
  • headaches
  • blurred vision
  • dry eyes
  • neck and shoulder pain

These symptoms may be caused by:

  • poor lighting
  • glare on a digital screen
  • improper viewing distances
  • poor seating posture
  • uncorrected vision problems
  • a combination of these factors