ArtsAutosBooksBusinessEducationEntertainmentFamilyFashionFoodGamesGenderHealthHolidaysHomeHubPagesPersonal FinancePetsPoliticsReligionSportsTechnologyTravel

What are Transition Lenses?

Updated on December 27, 2010

Definition of Transition Lenses

Transition lenses are the same thing as Photochromatic lenses and have the ability to darken automatically when exposed to UV rays (Ultra-Violet). The degree of darkness (tint) is dependent upon the intensity of light. If the light is very strong, transition lenses will almost become opaque, if the light is not as intense, the lenses will become more clear (the tint disappears).

Basically, the lenses get darker when it is sunny, and gets clearer when its darker. Transition lenses have been implemented in prescription eye glasses as an added benefit to the consumer. They are normal glasses when you are indoors, and sunglasses at night. This is great, because now you don't have to buy two pairs of prescription glasses

Get Affordable Transition Prescription Glasses Online

Transition prescription glasses can become very costly, and can make a nice dent in your pocket. I found that purchasing prescription eye-wear online is a great solution to this problem. After buying my glasses from local stores for years, I decided to buy some online. What a great idea that was.

Instead of spending hundreds on just one pair, you can get 3 or 4 for the price of one. I have been buying my prescription glasses with transition lenses from Check them out, you won't be disappointed.

The Science Behind Transition Lenses

A scientific element, Micro-crystalline silver halides (usually silver chloride), is the substance that is responsible for the photo-chromatic property of the lenses. This substance is embedded into the glass version of lenses to make them photo-chromatic. Transition lenses contains millions of silver halides crystals, and when exposed to sunlight the UV rays transform the crystals into light absorbing particles. When these particles absorb light, the lenses darken and the amount of light passing through the lens is reduced. When the lenses are removed from the sun's exposure exposure and the stimulating UV radiation is not present anymore, the crystals then return to their original orientation and the lenses become clear.

On the other hand, unlike glass lenses, the transitional property in plastic lenses depends upon organic photo-chromatic molecules for their reversible darkening. The main reason that these lenses darken in the sunlight, and not in indoors, is that there is not any ultraviolet rays indoors. The Photo-chromatic lenses come back to their original color due to thermal process. Because of this reason, some plastic lenses do not work very well in hot temperatures.


    0 of 8192 characters used
    Post Comment

    No comments yet.


    This website uses cookies

    As a user in the EEA, your approval is needed on a few things. To provide a better website experience, uses cookies (and other similar technologies) and may collect, process, and share personal data. Please choose which areas of our service you consent to our doing so.

    For more information on managing or withdrawing consents and how we handle data, visit our Privacy Policy at:

    Show Details
    HubPages Device IDThis is used to identify particular browsers or devices when the access the service, and is used for security reasons.
    LoginThis is necessary to sign in to the HubPages Service.
    Google RecaptchaThis is used to prevent bots and spam. (Privacy Policy)
    AkismetThis is used to detect comment spam. (Privacy Policy)
    HubPages Google AnalyticsThis is used to provide data on traffic to our website, all personally identifyable data is anonymized. (Privacy Policy)
    HubPages Traffic PixelThis is used to collect data on traffic to articles and other pages on our site. Unless you are signed in to a HubPages account, all personally identifiable information is anonymized.
    Amazon Web ServicesThis is a cloud services platform that we used to host our service. (Privacy Policy)
    CloudflareThis is a cloud CDN service that we use to efficiently deliver files required for our service to operate such as javascript, cascading style sheets, images, and videos. (Privacy Policy)
    Google Hosted LibrariesJavascript software libraries such as jQuery are loaded at endpoints on the or domains, for performance and efficiency reasons. (Privacy Policy)
    Google Custom SearchThis is feature allows you to search the site. (Privacy Policy)
    Google MapsSome articles have Google Maps embedded in them. (Privacy Policy)
    Google ChartsThis is used to display charts and graphs on articles and the author center. (Privacy Policy)
    Google AdSense Host APIThis service allows you to sign up for or associate a Google AdSense account with HubPages, so that you can earn money from ads on your articles. No data is shared unless you engage with this feature. (Privacy Policy)
    Google YouTubeSome articles have YouTube videos embedded in them. (Privacy Policy)
    VimeoSome articles have Vimeo videos embedded in them. (Privacy Policy)
    PaypalThis is used for a registered author who enrolls in the HubPages Earnings program and requests to be paid via PayPal. No data is shared with Paypal unless you engage with this feature. (Privacy Policy)
    Facebook LoginYou can use this to streamline signing up for, or signing in to your Hubpages account. No data is shared with Facebook unless you engage with this feature. (Privacy Policy)
    MavenThis supports the Maven widget and search functionality. (Privacy Policy)
    Google AdSenseThis is an ad network. (Privacy Policy)
    Google DoubleClickGoogle provides ad serving technology and runs an ad network. (Privacy Policy)
    Index ExchangeThis is an ad network. (Privacy Policy)
    SovrnThis is an ad network. (Privacy Policy)
    Facebook AdsThis is an ad network. (Privacy Policy)
    Amazon Unified Ad MarketplaceThis is an ad network. (Privacy Policy)
    AppNexusThis is an ad network. (Privacy Policy)
    OpenxThis is an ad network. (Privacy Policy)
    Rubicon ProjectThis is an ad network. (Privacy Policy)
    TripleLiftThis is an ad network. (Privacy Policy)
    Say MediaWe partner with Say Media to deliver ad campaigns on our sites. (Privacy Policy)
    Remarketing PixelsWe may use remarketing pixels from advertising networks such as Google AdWords, Bing Ads, and Facebook in order to advertise the HubPages Service to people that have visited our sites.
    Conversion Tracking PixelsWe may use conversion tracking pixels from advertising networks such as Google AdWords, Bing Ads, and Facebook in order to identify when an advertisement has successfully resulted in the desired action, such as signing up for the HubPages Service or publishing an article on the HubPages Service.
    Author Google AnalyticsThis is used to provide traffic data and reports to the authors of articles on the HubPages Service. (Privacy Policy)
    ComscoreComScore is a media measurement and analytics company providing marketing data and analytics to enterprises, media and advertising agencies, and publishers. Non-consent will result in ComScore only processing obfuscated personal data. (Privacy Policy)
    Amazon Tracking PixelSome articles display amazon products as part of the Amazon Affiliate program, this pixel provides traffic statistics for those products (Privacy Policy)