Jump to content
shadow_of_light

blue light filter for the eye care

Recommended Posts

What is Blue Light?

Sunlight is made up of red, orange, yellow, green, blue, indigo and violet light. When combined, it becomes the white light we see. Each of these has a different energy and wavelength. Rays on the red end have longer wavelengths and less energy. On the other end, blue rays have shorter wavelengths and more energy. Light that looks white can have a large blue component, which can expose the eye to a higher amount of wavelength from the blue end of the spectrum.

 

Share this post


Link to post
Share on other sites

Where Are You Exposed to Blue Light?

The largest source of blue light is sunlight. In addition, there are many other sources:

    Fluorescent light
    CFL (compact fluorescent light) bulbs
    LED light
    Flat screen LED televisions
    Computer monitors, smart phones, and tablet screens

Blue light exposure you receive from screens is small compared to the amount of exposure from the sun.  And yet, there is concern over the long-term effects of screen exposure because of the close proximity of the screens and the length of time spent looking at them. According to a recent NEI-funded study, children’s eyes absorb more blue light than adults from digital device screens.

Related link:
http://www.ncbi.nlm.nih.gov/pubmed/21600300?report=abstract

Share this post


Link to post
Share on other sites

What Are The Benefits of Blue Light?

Blue light is needed for good health:

    It boosts alertness, helps memory and cognitive function and elevates mood.
    It regulates circadian rhythm – the body's natural wake and sleep cycle. Exposure to blue light during daytime hours helps maintain a healthful circadian rhythm. Too much exposure to blue light late at night (through smart phones, tablets, and computers) can disturb the wake and sleep cycle, leading to problems sleeping and daytime tiredness.
    Not enough exposure to sunlight in children could affect the growth and development of the eyes and vision. Early studies show a deficiency in blue light exposure could contribute to the recent increase in myopia/nearsightedness.

Share this post


Link to post
Share on other sites

How Does Blue Light Affect the Eyes?

Almost all visible blue light passes through the cornea and lens and reaches the retina. This light may affect vision and could prematurely age the eyes. Early research shows that too much exposure to blue light could lead to:

Digital eyestrain: Blue light from computer screens and digital devices can decrease contrast leading to digital eyestrain. Fatigue, dry eyes, bad lighting, or how you sit in front of the computer can cause eyestrain. Symptoms of eyestrain include sore or irritated eyes and difficulty focusing.

Edited by shadow_of_light

Share this post


Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now


  • Recent Posts on ShiaChat!

    • As-Sahifa Al-Kamilah Al-Sajjadiyya The Psalms of Islam AUTHOR(S):  Imam Ali Zaynul Abidin (a) https://www.al-islam.org/sahifa-al-kamilah-sajjadiyya-imam-zain-ul-abideen PUBLISHER(S):  Muhammadi Trust of Great Britain and Northern Ireland A collection of supplications and whispered prayers composed by the great-grandson of the Prophet (s). Includes supplication for the Coming of the Month of Ramadhan, and supplication for Bidding Farewell to the Month of Ramadhan. At the end there is also the famous Treatise on Rights that explains beautifully the rights in an Islamic point of view. CATEGORY:  Supplications TOPIC TAGS:  SUPPLICATIONS SAHIFAH SAJJADIYYAH PERSON TAGS:  Imam Ali Zaynul Abidin (a)
    • http://www.shiachat.com/forum/topic/235006908-sunnis-and-shias-can-we-just-unite/?page=4&tab=comments#comment-3097753  
    • This suggestion really depends on how likely you will get a broken jaw. You can do mutah with a no-sex arrangement. [And with the change in Australian law, say you will do it with a girl if necessary --suggested as scare-tactic.] Now, a similar situation was/is near me. The oldest is constantly abused by her father (he is on medication). Here is one  small  example: After she graduated college -and she lived ate home while attending- she got into medical school where she then lived about 200 miles away. Once when she was home, her father got hold of her smart phone and started calling everyone on her contact list to ask about any sexual activity, drinking and so forth. The list included her advisor.
    • Off-hand l'd say two of your options are: 1] Take him to small-claims court and use the courts 'judgment cap' (e.g. $2500 in some states) and claim this portion is past due if he owes more than $2500.  Then go-for-the-rest later (if necessary  ) 2] Write him off your taxes as a "bad debt" and send a report to a credit reporting agency. Also, if he put the money into a business, then go to the BBB and see if their complaint dep't can help.
    • hi in my opinion the main problem between sunni &shia is about their claiming of supremacy to  each other for shias their Imams are martyred and according to  below verses when we call them they answer us and all of them 100% beneficial to us but sunni leaders were ordinary people & sunnis bro&sis dont call them as martyrs  so whats their benefit for them as you see in  verse 12  And of the people is he who worships Allah on an edge. If he is touched by good, he is reassured by it; but if he is struck by trial, he turns on his face [to the other direction]. He has lost [this] world and the Hereafter. That is what is the manifest loss. (11) He invokes instead of Allah that which neither harms him nor benefits him. That is what is the extreme error. (12) He invokes one whose harm is closer than his benefit - how wretched the protector and how wretched the associate. (13)Indeed, Allah will admit those who believe and do righteous deeds to gardens beneath which rivers flow. Indeed, Allah does what He intends. (14) Whoever should think that Allah will not support [Prophet Muhammad] in this world and the Hereafter - let him extend a rope to the ceiling, then cut off [his breath], and let him see: will his effort remove that which enrages [him]? (15) Al-Hajj◄  333  ►Juz 17 http://tanzil.net/#22:11
×