Modifica occhiali

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-	[title\|Eyeglasses ~~Repair~~]
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	[summary]Fix your glasses (either eyeglasses or sunglasses) with one of these guides.[/summary]
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+	[page_title\|Eyeglasses Repair]



	== Background and Identification ==

-	~~'''~~Eyeglasses~~'''~~, also known as ~~'''~~spectacles~~'''~~ or simply ~~'''~~glasses~~'''~~, are a pair of lenses set into a frame that allows them to sit in front of the user’s eyes, typically as a visual aid. The middle of the frame sits atop the bridge of the nose, while the arms extend to loop around the ears so that the pair of glasses remains affixed to the user’s face without much need for adjustment. The lenses were historically made of glass, but can now be made with either glass or plastic, with the concavity or convexity varying based on the visual impairment of the user.
+	*Eyeglasses, also known as spectacles* or simply *glasses*, are a pair of lenses set into a frame that allows them to sit in front of the user’s eyes, typically as a visual aid. The middle of the frame sits atop the bridge of the nose, while the arms extend to loop around the ears so that the pair of glasses remains affixed to the user’s face without much need for adjustment. The lenses were historically made of glass, but can now be made with either glass or plastic, with the concavity or convexity varying based on the visual impairment of the user.

	Eyeglasses are also used for eye protection uses, such as safety goggles or sunglasses, with the former protecting from physical debris falling into the eyes, and the latter protecting from UV rays. Modern technologies have allowed for the development of polarized lenses, which are capable of blocking out certain wavelengths of light. These are typically used to reduce the UVA and UVB (wavelengths < 400 nm) exposure from the sun, but have also been adapted for use in laser labs with particular wavelength bands being blocked depending on the wavelengths of the lasers being used.

Inglese

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Fix your glasses (either eyeglasses or sunglasses) with one of these guides.

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== Background and Identification ==

***Eyeglasses***, also known as ***spectacles*** or simply ***glasses***, are a pair of lenses set into a frame that allows them to sit in front of the user’s eyes, typically as a visual aid. The middle of the frame sits atop the bridge of the nose, while the arms extend to loop around the ears so that the pair of glasses remains affixed to the user’s face without much need for adjustment. The lenses were historically made of glass, but can now be made with either glass or plastic, with the concavity or convexity varying based on the visual impairment of the user.

Eyeglasses are also used for eye protection uses, such as safety goggles or sunglasses, with the former protecting from physical debris falling into the eyes, and the latter protecting from UV rays. Modern technologies have allowed for the development of polarized lenses, which are capable of blocking out certain wavelengths of light. These are typically used to reduce the UVA and UVB (wavelengths < 400 nm) exposure from the sun, but have also been adapted for use in laser labs with particular wavelength bands being blocked depending on the wavelengths of the lasers being used.

Eyeglasses were developed based on the early study of optics, with the first magnifying convex lens thought to be described in [https://en.wikipedia.org/wiki/Ptolemy|Ptolemy]’s ''Optics''. Arabic scholars improved upon the concept of a lens, with the most notable contributions coming from [https://en.wikipedia.org/wiki/Ibn_al-Haytham|Ibn al-Haytham] in his work [https://en.wikipedia.org/wiki/Book_of_Optics|''Book of Optics'']. The first functional set of corrective lenses bound within a frame is theorized to have been created in Northern Italy around Pisa in the early 12th century.

You can typically tell whether a lens is intended to be corrective by seeing whether the lens distorts light while looking through it. Likewise, you can test if a lens has been polarized by looking through it at an LCD screen, as some screens are distorted by the polarization.

== Additional Information ==

* [https://en.wikipedia.org/wiki/Glasses|Wikipedia - Glasses]
* [https://en.wikipedia.org/wiki/Sunglasses|Wikipedia - Sunglasses]
* [https://en.wikipedia.org/wiki/Polarization_(waves)|Wikipedia - Polarization]

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Italiano

[title|occhiali]

[summary]Ripara i tuoi occhiali (da vista o da sole) con una di queste guide.[/summary]

[summary_image|3076783]

== Storia e identificazione ==

Gli ***occhiali*** sono un paio di lenti inserite in una montatura che permette loro di rimanere di fronte agli occhi di chi li usa, tipicamente come supporto visivo. Il centro della montatura si posiziona sul ponte del naso, mentre le stanghette si allungano per girare sulle orecchie così che il paio di occhiali resti fisso sulla faccia dell'utente senza bisogno di aggiustarli. Le lenti erano storicamente fatte di vetro, ma ora possono essere fatte di vetro o plastica, con una concavità o convessità che varia in base al deficit visivo dell'utente.

Alcuni occhiali sono anche usati per proteggere gli occhi, come gli occhiali protettivi o gli occhiali da sole, i primi proteggono i tuoi occhi dai detriti fisici, gli altri dai raggi UV. Le tecnologie moderne permettono lo sviluppo di lenti polarizzate, che possono bloccare certe lunghezze d'onda della luce. Queste sono solitamente usate per ridurre l'esposizione UVA e UVB (le lunghezze d'onda <400 nm) dal sole, ma sono state adattate anche per essere usate in laboratori laser con bande particolari di lunghezze d'onda bloccate a seconda delle lunghezze d'onda dei laser.

Gli occhiali da vista sono stati sviluppati sulla base dei primi studi di ottica, la prima lente d'ingrandimento convessa è stata descritta nell'''Ottica'' di [link|https://it.wikipedia.org/wiki/Claudio_Tolomeo|Tolomeo]. Gli studiosi arabi hanno migliorato il concetto di lente e [link|https://it.wikipedia.org/wiki/Alhazen|Alhazen|new_window=true] ha dato i contributi più notevoli nel suo [link|https://en.wikipedia.org/wiki/Book_of_Optics|''Libro di ottica''|new_window=true]. Si teorizza che il primo set funzionale di lenti correttive inserite in una montatura sia stato creato in nord Italia, intorno a Pisa nei primi anni del dodicesimo secolo.

Tipicamente si può capire se una lente è correttiva vedendo se la lente distorce la luce quando ci guardi attraverso. Allo stesso modo, puoi testare se una lente è stata polarizzata guardando uno schermo LCD attraverso la lente, poiché alcuni schermi vengono distorti dalla polarizzazione.

== Ulteriori informazioni ==

* [https://it.wikipedia.org/wiki/Occhiali|Wikipedia - Occhiali|new_window=true]
* [https://it.wikipedia.org/wiki/Occhiali_da_sole|Wikipedia - Occhiali da sole|new_window=true]
* [https://it.wikipedia.org/wiki/Polarizzazione_della_radiazione_elettromagneticaWikipedia|new_window=true]