Mutual Funds Commodities Research Tax Planning IPO Our Team Contact Us    
Google
Web www.equitybulls.com
Union Budget
Budget 2011-2012 Home
Industry Expectations - Budget 2011-2012
Industry Reactions - Budget 2011-2012
Budget 2010-2011
Budget 2010-2011 Home
Industry Expectations - Budget 2010-2011
Industry Reactions - Budget 2010-2011
Contributor's Corner
Bonanza Portfolio
Hemant K Gupta
Krish Bhatt
S A A R T H I
Trinity Investments
Exchange Information
BSE 2009 Holidays
NSE 2009 Holidays
Investor Guide
Depository & Dematerialisation
Grievance Redressal
Investor Guide
SEBI
Trading of Securities
Transfer of Securities
Your Rights
Budget 2009-2010
Budget 2009-2010 Home
Industry Expectations - Budget 2009-2010
Industry Reactions - Budget 2009-2010
Interim Budget 2009-2010 Home
Industry Expectations - Interim Budget 2009
Budget 2008-2009
Railway Budget 2008-2009
Industry Expectations - Budget 2008
Union Budget 2008-2009
Highlights of Budget 2008-2009
Summary of Budget 2008-2009
Industry Reactions - Budget 2008
IPOs
Current IPOs
Past IPOs
IPO Subscription
Mutual Funds
Gold Exchange Traded Fund
MF Unique Holding
Forthcoming Dividends
ELSS Schemes Comparison
Tax Plans
New Fund Offers
Research
Arbitrages
Equity
Market Whispers
Tax Planning
Home
Equity Linked Savings Scheme
Post Office MIS
9% GOI Senior Citizens Savings Scheme
8% Savings (Taxable) Bonds
Kisan Vikas Patra
National Savings Certificate
Public Provident Fund
General

| More

Blue Light Hazard: Not Just UV Radiation, Eyes Face Threat from Blue Violet Light as Well

Posted On: 2016-04-04 23:16:00

Dr. Ira Chopra, Consultant Eye Surgeon, Paras Hospitals writes on how our eyes face a rising health threat with an inevitable switch to modern lighting techniques and increased usage of digital devices

The effects of harmful Ultra Violet Radiation on the health of skin and eyes have been well documented and much talked about in recent years. However, researchers today have identified that ultra violet light is not the only harmful component of light when it comes to visual health. The Blue Violet spectrum of visible light is another component that has the potential to cause damage to retinal cells of the eyes. In fact, researchers have coined a new term to describe the danger this light spectrum presents to critical structures within the eye. They call it "blue light hazard".

Interestingly, blue violet light (wavelengths between 380 and 500 nm) is not just emitted by the sun but also by artificial sources of light such as LEDs, CFLs, and digital devices such as computers and smartphones. Given the increased usage of new age lighting devices and an increasingly ubiquitous existence of smartphones and computers, what we are witnessing today is a much higher exposure to blue violet light than say five years back.

This development has prompted a new wave of research and studies in the field of ophthalmology as well as ophthalmologic optics. But before moving on to that let's understand with greater precision the effects of blue violet light on the structures within the eyes.

What is Blue Light?

The small spectrum of the electromagnetic radiation which our human eyes are capable of perceiving is termed 'visible light'. A human eye typically responds to wavelengths between 390 to 700 nm (nano metre). This entire visible spectrum can further be divided into different bands which includes blue, green and red lights. Blue light has a wavelength of between 380 nm and 500 nm, making it one of the shortest, highest-energy wavelengths. While this range of visible light spectrum plays a generally beneficial role on health, in particular by regulating the internal biological clock, a small but specific section of this band has been found to cause damage to retinal cells.

Because they have shorter wavelengths and higher frequency and higher energy, blue light waves create flickering and glaring effect on the eyes. This is perhaps why prolonged exposure to computers, television and smartphones causes strain to the eyes, headaches or fatigue. Researchers believe that prolonged exposure to blue light may cause retinal damage and contribute to age-related macular degeneration, which can further lead to loss of vision. In most cases, this photochemical damage accumulates over a lifetime.

Where is Blue Light?

Well, it is everywhere! While sun is the main source of blue light emission, it is certainly not the only source. Today, we are literally surrounded by sources of blue light and therefore continuously exposed to it.

While solar radiation is considered to have 25% to 30% blue light, the modern, energy efficient light sources such as CFLs and LEDs emit significantly higher amount of harmful blue light (roughly 26% of the light from CFLs is blue while an estimated 35% of light emitted by LEDs lies in the blue portion). On the contrary, the conventional, incandescent lamps which were widely used till a few years back, were noticed to emit very little blue light.

Besides, our eyes hardly stops working in front of digital screens today. The digital screen technology has evolved radically over the years, and many of today's electronic devices use LED back-light technology. Computers, cell phones, flat-screen televisions and tabs are just among a few of the devices that use this technology. With their wide-spread use, not only has our cumulative exposure to blue light increased, but the duration of exposure is also radically higher today.

What are the Solutions & Preventive Mechanisms?

The natural filters of the human eye do not provide sufficient protection against blue light. Therefore, any preventive mechanism has to start with greater awareness and attempts to reduce exposure of harmful blue light. Researchers have also been off late working on mechanisms to help selectively filter the harmful wavelengths of blue light while transmitting the beneficial ones.

In this context, researchers at Essilor and the Paris Vision Institute have succeeded in identifying the very narrow band of blue light that is associated with photo toxic damage of the retinal cells. The culmination of this research has led to the development of lenses that has the ability to selectively filter the narrow but harmful wavelengths of blue light that are damaging to the eyes while allowing the healthy band of blue light to play its normal roles. The technology has been incorporated in the latest spectacle lenses manufactured by Essilor such as Crizal Prevencia and Eyezen.

Protecting Your Vision

Limiting the amount of screen time is very important for the generation that lives by digital devices. While one cannot do away with the requirements of work, we can certainly reduce the leisure time spent on digital devices. Reducing time spent on chatting and surfing the Internet can be helpful in reducing eye strain, headaches and digital mental fatigue.

Using screens and digital devices in a correct posture is also important. Make sure the screen causes minimal glare, reduce brightness and surrounding lights and make sure the screen is always right ahead of your face to ensure least strain on the eyes.

Take regular breaks from screen time. Stand up from your desk every two hours and just walk around the workplace for five minutes. Blink more often.

Wearing protective eye wears in front of digital screens has emerged as the most viable preventive option in the face of increasing prevalence and exposure to blue light radiation. Studies have also showed that wearing protective lenses with blue light filters helps reduce symptoms of eye strain and fatigue.


Source: Equity Bulls

Click here to send ur comments or to feedback@equitybulls.com





Other Headlines:

PM Narendra Modi makes historic announcements on ending corruption and black money
In a rare event, 52-year-old, apparently dead was revived at Columbia Asia Hospital, Ahmedabad
Aashima Mehta designs for film Vaapsi
Summer clutches by Holii
Massco Media College announces admissions in various mass communication courses
The Delhi School of Communication Organises Annual Convocation Programme
Tips for employers to make commuting for employees easy and safe during Phase II of Delhi government's Odd-Even traffic scheme
Kanika Kapoor & DJ Rink sets SHIZNAY 2016 stage to ablaze
Aruna Iyer - Chef at Courtyard by Marriott Pune city center
94.3 My FM announces the winner of Paison ka ped season II
The Loomba Foundation presents the World Widows Report at the United Nations in New York
How to Fletter - A word game that makes you think fast and act faster
Foodhall welcomes you to Ola Cantina - The Mexican Festival
JD Institute of Fashion Technology opens its centre in Jodhpur
Yahoo Messenger Now available in Hindi for Android users
Frontier Lifeline Hospital Observed World Health Day
Thums Up Thunder Challenge brings the ultimate test of strength and mental grit to Rajahmahendravaram
Subir Hati to represent India at the Glenfiddich Artists in Residence Programme
An Indian Student Publishes an Amazon Kindle Book to Reveal about the Shocking Racial Discrimination He Experienced in a US University
Diabetacare screens 1500 government officials and employees for diabetes and diabetes induced complications
3rd Shambhavi Puraskar awarded to Ms. Sabarmatee of Orissa
Sichuan Tourism Administration plans to promote tourism from India to China
Delhi Daredevils hop on board Shuttl for a greener Delhi
World Health Day Young adults falling prey to diabetes, pointing to an alarming shift, alert doctors at Columbia Asia Hospitals
Venus Concept to Launch Advanced Aesthetic Treatment Devices in Cochin
Splash introduces the new range of Spring Summer16 Accessories
Reebok launches the all new Digital Foot Map technology
One Touch Response flags its on-demand Personal Safety and Immediate Assistance Service for regular commuters during phase II of odd-even scenario
Pakistani Man with Amputated Arms Gets New Lease of Life with Innovative Low-Cost Assistive Device at Indian Spinal Injuries Centre
Cornitos' Navratri Special: No Onion No Garlic Nachos Crisps
Few Seats Left For Knowledge@Wharton High School Global Young Leaders Academy Summer Program 2016
Get ready for summers with Soothing Cream Massage at Aesthetics Medispa
Mumbai ran for Autism - Cause-a-thon
Notion Press presents author Vijetha SN with the exciting debut novel 'Strange Weather at the Ridge'
Smaaash Spring Special, all day long at Smaaash, Cyberhub Gurgaon
Summer Offers At Rumourss Sky Villa & Resort
After Huge Overseas Accolades IFLC Is Going To Win Indian Hearts On May 07 At Talkatora Stadium New Delhi
FIITJEE's General Admission Test to be heldon 3rd April, 2016
Chennai flash floods were the largest natural catastrophe in India in 2015, says Swiss Re sigma study
Unexplained Knee Pain? Vitamin D Deficiency Might be the Cause
What It Means to Be a Woman?
Oysters Beach Announced Its Season Launch
Learn the essential skills of 'JavaScript, HTML and CSS Web Development' edX's new course by Microsoft
Doctors Advocate Adoption of Better Diagnostic Algorithms to Fight Multi Drug Resistant TB
Paras Hospitals, Gurgaon Initiates 'Purple-o-thon', walkathon on World Epilepsy Awareness Day
Sankara Eye Hospital Converts into a Court for "Chakravyuh"
Young Woman Saves Life of Road Accident Victim in City: Paras Hospitals, Gurgaon Honours the Good Samaritan
My Life in Love Book launched
Manipal University campuses observes Earth Hour
Spring must-have: Bright India-inspired bags from Holii


Website Created & Maintained by : Chennai Scripts
West Mambalam, Chennai - 600 033,
Tamil Nadu, India

disclaimer copyright © 2005 - 2017