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The Basics of Blue Light

Facts About Blue Light By Our San Jose Optometrist

There’s a lot of talk nowadays about the dangers of blue light, yet do you fully understand what it is? Let our San Jose eye doctors and Berryessa Optometry team enlighten you!

What is blue light?

All light is composed of electromagnetic particles that move in waves of varying lengths and powers, always emitting energy. The shorter the wavelength, the higher the amount of energy. Wavelengths are assigned different colors and categories, and blue light, with one of the shortest, high-energy wavelengths, lies within the grouping of visible light that we can see.

Where is blue light?

Did you ever wonder why we see blue skies? When the light from the sun journeys through our atmosphere, blue wavelengths crash into air molecules, causing the blue light to disperse.

In fact, blue light surrounds us at all times, shining from the sun, electronic devices, fluorescent lighting, digital screens and LED lights. In our high-tech world, most of us spend hours per day gazing at a digital screen – being exposed to loads of artificial blue light.

Is blue light good or bad?

Both answers are correct.

Natural blue light from the sun helps to regulate your circadian rhythm, setting the times for sleeping and waking. It also jumpstarts your energy levels, boosts your moods, fortifies your memory and speeds your reactions.

Artificial blue light, as well as too much natural blue light, is an entirely different story. Blue wavelengths, also known as “High Energy Visible” (HEV) wavelengths, flicker a lot, which generates a glare that can impact visual clarity and reduce visual contrast. After hours in front of a computer screen, this flickering often leads to headaches, eyestrain and general fatigue.

In addition, your eyes are built with natural filters against many damaging elements, yet these filters do not protect adequately against blue light that emanates from the sun or from artificial sources. Prolonged exposure to blue light rays may contribute to macular degeneration or cause retinal damage, both of which threaten your vision.

While electronic devices, such as computers, smartphones and iPads have had a very positive effect on our daily lives, they also introduce a new potential risk.

The threat posed to your eyes by blue light is rapidly growing larger as digital technology pervades all parts of our modern lifestyle. In response, BluTech Lenses and Recharge Lens Treatments are available for our wide range of stylish, designer frames.

Berryessa Optometry in San Jose is proud to announce BluTech Lenses, built so as to bolster your convenience, eyesight and eye safety during work and fun.

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Friday and Saturday: Early appts available on request

Open Hours:

  • 9:00 AM - 5:30 PM
  • 10:30 AM - 7:00 PM
  • 9:00 AM - 5:30 PM
  • 9:00 AM - 5:30 PM
  • 8:00 AM - 2:00 PM
  • 8:00 AM - 2:00 PM
  • Closed

Friday and Saturday: Early appts available on request

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In response to the updated "shelter-in-place" ordinance by the Department of Public Health for Santa Clara County and its recommendations for social distancing, Berryessa Optometry will be closed from March 17 to May 3. We plan to reopen on Monday, May 4th at 9 AM. We will keep abreast of this fluid situation, as we strongly suggest you do as well on www.cdc.gov. We will make adjustments, as necessary, based on the mandates of the CDC and the local public health authorities.

Contact Lenses: you can still order your contacts (free shipping) by emailing insurance@berryessaoptometry.com.

During our closure, we will not be able to receive or respond to phone calls. Please do not leave any voice messages. If you are having an eye emergency, please call 911 or go to your nearest emergency room.

The safety and health of our patients and staff remain our highest priority. We apologize for any stress and inconvenience this may have caused.

Thank you and be safe,

Thomas L. Lim OD                                              Hung D. Mac, OD

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In response to the updated “shelter-in-place” ordinance by the Department of Public Health for Santa Clara County and its recommendations for social distancing, Berryessa Optometry will be closed from March 17 to May 3. We plan to reopen on Monday, May 4th at 9 AM. We will keep abreast of this fluid situation, as we strongly suggest you do as well on www.cdc.gov. We will make adjustments, as necessary, based on the mandates of the CDC and the local public health authorities.

Contact Lenses: you can still order your contacts (free shipping) by emailing insurance@berryessaoptometry.com.

During our closure, we will not be able to receive or respond to phone calls. Please do not leave any voice messages. If you are having an eye emergency, please call 911, go to your nearest emergency room or we can be reached at 1(408)448-9898

The safety and health of our patients and staff remain our highest priority. We apologize for any stress and inconvenience this may have caused.

Thank you and be safe,

Thomas L. Lim, OD Hung D. Mac, OD