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DO CELLPHONES CAUSE VISION LOSS?
Presented By Group 11
Dana Ben-Zaid Robyn Garrido Hana Ismail Nefeli Kotopoulos Jessica Lortie
DO CELLPHONES CAUSE VISION LOSS? Presented By Group 11 Dana - - PowerPoint PPT Presentation
DO CELLPHONES CAUSE VISION LOSS? Presented By Group 11 Dana - - PowerPoint PPT Presentation
DO CELLPHONES CAUSE VISION LOSS? Presented By Group 11 Dana Ben-Zaid Robyn Garrido Hana Ismail Nefeli Kotopoulos Jessica Lortie FACTS VS. MYTHS WHAT DO CELLPHONES CAUSE? WHAT DONT CELL PHONES CAUSE?
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FACTS VS. MYTHS
- WHAT DO CELLPHONES CAUSE?
WHAT DON’T CELL PHONES CAUSE? Eye-dryness Strain Retinol Sensitivity Difficulty Refocusing Eyes Double-vision Vision-loss Permanent damage Macular Degeneration
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POLL #1
HOW MANY PEOPLE FEEL THEY HAVE EXPERIENCED THESE SYMPTOMS FROM USING SMART-PHONES?
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S C I E N T I F I C R E S E A R C H LACKS STUDIES TO MEASURE CELLPHONES & VISION LOSS
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3 KEY STUDIES
Cellphone distance from eyes Using Cellphones at Night Reading from Smart- phones vs. Books
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Participants Experiment Evaluation Conclusion
STUDY 1
Distance Between Phone Screen and Eyes
University students of similar health and age Manipulated distance between eyes and phone screens & type of light (black/ white)
- Measured difficulty
refocusing and eye- strain
- Found that 83% of
students experienced symptoms (44% had eye strain)
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STUDY 2
Effects of Blue Light on Eye Strain
Observed individuals who use their phone at night over time
- Tested vision using
psychophysical testing & electroretinography Found that blue light can cause difficulty adapting to the light (visual sensitivity)
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STUDY 3
Severity of Symptoms
Participants (of same age range) read from smart phone & from a book for 60 mins. ê Participants rated symptoms on a score of 0-10 ê Ran four statistical tests on the data ê Concluded that there is a difference in the severity of symptoms but it is not large
* Limitation: participants were aware of the format they were using for reading; answers may be subjective
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20-20-20 RULE
Every 20 mins, look at an object 20 feet away for at least 20 seconds
TIPS FOR PREVENTING TEMPORARY SYMPTOMS
Don’t rest one eye
- n your pillow while
looking at your phone Keep Phone at a Distance of 25cm Use night mode
- r turn down
brightness
DISTANCE USE BOTH EYES DISPLAY OPTIONS
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OUR CONCLUSION
Although overuse of a smartphones may cause a number of symptoms, all symptoms are temporary and completely
- avoidable. There is no conclusive,
scientific evidence linking cell-phone use to permanent vision-loss.
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POLL #2
HOW MANY PEOPLE STILL BELIEVE THAT CELLPHONES CAUSE VISION LOSS?
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THANK-YOU!
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REFERENCES
Aggarwal, K. (2013). Twenty-six percent doctors suffer from severe mobile phone-induced anxiety: Excessive use of mobile phone can be injurious to your health. Indian Journal of Clinical Practice, 24(1), 7-9. Retrieved March 30, 2018, from http://medind.nic.in/iaa/iaam.shtml
- Alim-Marvasti, A., Bi, W., Mahroo, O. A., Barbur, J. L., & Plant, G. T. (2016). Transient
smartphone “blindness”. New England Journal of Medicine,374(25), 2502-2504. doi:10.1056/ nejmc1514294
- Antona, B., Barrio, A. R., Gascó, A., Pinar, A., González-Pérez, M., & Puell, M. C. (2018). Symptoms
associated with reading from a smartphone in conditions of light and dark. Applied Ergonomics, 68, 12-17. doi:10.1016/j.apergo.2017.10.014
- Kaido, M., Toda, I., Oobayashi, T., Kawashima, M., Katada, Y., & Tsubota, K. (2016). Reducing short-
wavelength blue light in dry eye patients with unstable tear film improves performance on tests of visual acuity. Plos One,11(4). doi:10.1371/journal.pone.0152936
- Sadagopan, A., Manivel, Marimuthu., Nagaraj, H., Ratnam K, et al. (2017). Prevalence of smart phone
users at risk for developing cell phone vision syndrome among college students. Journal of Psychology and Psychotherapy, 7(299). doi:10.4172/2161-0487.1000299