Photochromic Lenses - Revision history

Bes at 20:16, 8 February 2018

2018-02-08T20:16:20Z

Bes at 20:15, 8 February 2018

2018-02-08T20:15:56Z

Shounsve at 18:20, 8 February 2018

2018-02-08T18:20:23Z

Shounsve at 18:18, 8 February 2018

2018-02-08T18:18:52Z

Shounsve at 18:15, 8 February 2018

2018-02-08T18:15:17Z

Shounsve at 17:51, 2 February 2018

2018-02-02T17:51:17Z

Shounsve at 17:49, 2 February 2018

2018-02-02T17:49:30Z

Shounsve at 17:49, 2 February 2018

2018-02-02T17:49:14Z

Shounsve at 17:46, 2 February 2018

2018-02-02T17:46:29Z

Shounsve at 17:46, 2 February 2018

2018-02-02T17:46:03Z

@@ Line 15: / Line 15: @@
 Glass photochromic lenses offer better resistance to scratches and can faithfully switch between dark or clear for longer than their plastic lens counterparts. This is because glass lenses employ durable inorganic silver, whereas plastic lenses employ less robust organic dye molecules.
-[[File:img_1.jpg|800px|frame|none|Figure 3:Transition of photochromic lenses exposed to UV radiation]]
+[[File:img_1.jpg|400px|frame|none|Figure 3:Transition of photochromic lenses exposed to UV radiation]]
-[[File:lenses_uv_3.png|400px|frame|none|Figure 4: A dental curing device was used to emit UV rays to polycarbonate lenses to darken over a time period of 40 seconds. The red graph is the dental curing device exposed to the probe. The blue graph is the dental curing device exposed to the lenses and probe.]]
+[[File:lenses_uv_3.png|800px|frame|none|Figure 4: A dental curing device was used to emit UV rays to polycarbonate lenses to darken over a time period of 40 seconds. The red graph is the dental curing device exposed to the probe. The blue graph is the dental curing device exposed to the lenses and probe.]]
 ===Sources===
 *https://pubs.acs.org/cen/science/87/8715sci5.html
 *https://www.sigmaaldrich.com/chemistry/chemistry-products.html?TablePage=16267111
 *http://www.seiko-opt.co.jp/en/lens/pc/transitions_s/

@@ Line 15: / Line 15: @@
 Glass photochromic lenses offer better resistance to scratches and can faithfully switch between dark or clear for longer than their plastic lens counterparts. This is because glass lenses employ durable inorganic silver, whereas plastic lenses employ less robust organic dye molecules.
-[[File:img_1.jpg|400px|frame|none|Figure 3:Transition of photochromic lenses exposed to UV radiation]]
+[[File:img_1.jpg|800px|frame|none|Figure 3:Transition of photochromic lenses exposed to UV radiation]]
 [[File:lenses_uv_3.png|400px|frame|none|Figure 4: A dental curing device was used to emit UV rays to polycarbonate lenses to darken over a time period of 40 seconds. The red graph is the dental curing device exposed to the probe. The blue graph is the dental curing device exposed to the lenses and probe.]]
 ===Sources===

@@ Line 16: / Line 16: @@
 [[File:img_1.jpg|400px|frame|none|Figure 3:Transition of photochromic lenses exposed to UV radiation]]
-[[File:lenses_uv_3.png|400px|frame|none|Figure 4:]]
+[[File:lenses_uv_3.png|400px|frame|none|Figure 4: A dental curing device was used to emit UV rays to polycarbonate lenses to darken over a time period of 40 seconds. The red graph is the dental curing device exposed to the probe. The blue graph is the dental curing device exposed to the lenses and probe.]]
 ===Sources===
 *https://pubs.acs.org/cen/science/87/8715sci5.html
 *https://www.sigmaaldrich.com/chemistry/chemistry-products.html?TablePage=16267111
 *http://www.seiko-opt.co.jp/en/lens/pc/transitions_s/

@@ Line 16: / Line 16: @@
 [[File:img_1.jpg|400px|frame|none|Figure 3:Transition of photochromic lenses exposed to UV radiation]]
+[[File:lenses_uv_3.png|400px|frame|none|Figure 4:]]
 ===Sources===
 *https://pubs.acs.org/cen/science/87/8715sci5.html
 *https://www.sigmaaldrich.com/chemistry/chemistry-products.html?TablePage=16267111
 *http://www.seiko-opt.co.jp/en/lens/pc/transitions_s/

@@ Line 17: / Line 17: @@
 [[File:img_1.jpg|400px|frame|none|Figure 3:Transition of photochromic lenses exposed to UV radiation]]
 ===Sources===
 *https://pubs.acs.org/cen/science/87/8715sci5.html
 *https://www.sigmaaldrich.com/chemistry/chemistry-products.html?TablePage=16267111
 *http://www.seiko-opt.co.jp/en/lens/pc/transitions_s/

@@ Line 6: / Line 6: @@
 When a photochromic dye is exposed to UV radiation, a chemical bond is broken. The molecules then rearranges into a specific species that absorbs at longer wavelengths in the visible region, causing lenses to darken.
-[[File:photochromic_reaction.gif|block|400px|frame|left|Figure 1:]]
+[[File:photochromic_reaction.gif|400px|frame|none|Figure 1:]]
-[[File:pyridobenzoaxine.png|block|400px|frame|left|Figure 2: Benzoxazine is composed of an oxazine ring, a heterocyclic aromatic six-membered ring with oxygen and nitrogen, attached to a benzene ring.]]
+[[File:pyridobenzoaxine.png|400px|frame|none|Figure 2: Benzoxazine is composed of an oxazine ring, a heterocyclic aromatic six-membered ring with oxygen and nitrogen, attached to a benzene ring.]]
 Improvements in the dyes over the years have led to faster activation and clearing, as well as longer lifetimes. For example, fusion of a bicyclic hydrocarbon group, called an indene group, to one of the benzene rings in a naphthopyran dye to make indenonaphthopyrans helps protect the dye from breaking down over time.
 The lenses material is important to support the layer of photochromic dyes, which affects how fast the lens darken and fades. Photochromic dyes do not work well in common plastic lenses, so companies developed special monomers that are compatible with the dyes.
@@ Line 15: / Line 15: @@
 Glass photochromic lenses offer better resistance to scratches and can faithfully switch between dark or clear for longer than their plastic lens counterparts. This is because glass lenses employ durable inorganic silver, whereas plastic lenses employ less robust organic dye molecules.
-[[File:img_1.jpg|400px|frame|center|Figure 3:Transition of photochromic lenses exposed to UV radiation]]
+[[File:img_1.jpg|400px|frame|none|Figure 3:Transition of photochromic lenses exposed to UV radiation]]
 ===Sources===