Reach for Excellence

Blue Light Quiz: Find Out How Much You Know

By Mark Wright, OD, FCOVD,
and Carole Burns, OD, FCOVD
ROB Professional Editors

August 30, 2017

You may not know as much about blue light as you think you do, if the results of Jobson Optical Research’s 2016 Blue Light Study are any indication. The report, which was created after surveying eyecare providers in the U.S., found that 49 percent believe clear lenses can protect against blue light, and 79 percent believe that sunglasses offer protection, as well.

What do you know about UV and blue light? Take this short eight-question quiz to find out.

1) The band of blue light most harmful to the retina and to the RPE cells is
a) 335-375 nm
b) 375-415 nm
c) 415-455 nm
d) 455-495 nm

2) The effect of harmful blue light to the retina is …
a) Cumulative
b) Temporary
c) Partial
d) Decreasing

3) Source(s) of bad blue light would be …
a) Sun
b) LED lighting
c) CFL lighting
d) TV’s
e) Computer screens
f) Smartphones
g) a and d
h) a and e
i) None of the above
j) All of the above

4) The band of good blue light is …
a) 405-435 nm
b) 435-465 nm
c) 465-495 nm
d) 495-525 nm

5) Good blue light is important to …
a) Regulate the pupillary reflex
b) Maintain and regulate circadian sleep/wake cycle
c) Maintain and regulate memory
d) Maintain and regulate mood
e) Maintain and regulate hormones
f) a and b
g) a and c
h) a and e
i) None of the above
j) All of the above

6) Traditional blue blocking lenses
a) Block the bad blue light, but let the good blue light through
b) Block the good blue light, but let the bad blue light through
c) Block both good and bad blue light
d) Only block UV light

7) On a cloudy day, up to ___% of the sun’s UV rays can pass through the clouds.
a) 60%
b) 70%
c) 80%
d) 90%

8) The best protective lens would
a) Block 100% of UV light, block bad blue light, and permit good blue light transmission
b) Block 100% of UV light, block bad blue light, permit good blue light transmission, and have front & back surface antireflection treatments
c) Block 100% of both UV light and blue light, and have front & back surface antireflection treatments
d) Block 95% of UV light, block bad blue light, permit good blue light transmission, and have front & back surface antireflection treatments

The answers are …
1) 415-455 nm
2) Cumulative
3) All of the above
4) 465-495 nm
5) All of the above
6) Block both good and bad blue light
7) 80%
8) Block 100% of UV light, block bad blue light, permit good blue light transmission, and have front & back surface antireflection treatments

So, how did you do? More importantly, how are you prescribing for your patients? If you’d like to read more on this topic, click HERE.

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