3.7 sec in total
309 ms
2.9 sec
425 ms
Click here to check amazing Uk Optical Center content for France. Otherwise, check out these important facts you probably never knew about uk.optical-center.fr
Buy your eyeglasses, sunglasses and contact lenses online at the best price at your online optician Optical Center.
Visit uk.optical-center.frWe analyzed Uk.optical-center.fr page load time and found that the first response time was 309 ms and then it took 3.4 sec to load all DOM resources and completely render a web page. This is a poor result, as 55% of websites can load faster.
uk.optical-center.fr performance score
name
value
score
weighting
Value3.9 s
25/100
10%
Value12.8 s
0/100
25%
Value6.8 s
35/100
10%
Value440 ms
64/100
30%
Value0.003
100/100
15%
Value9.7 s
28/100
10%
309 ms
560 ms
27 ms
662 ms
38 ms
Our browser made a total of 70 requests to load all elements on the main page. We found that 1% of them (1 request) were addressed to the original Uk.optical-center.fr, 36% (25 requests) were made to I2.optical-center.fr and 13% (9 requests) were made to Fonts.gstatic.com. The less responsive or slowest element that took the longest time to load (1.1 sec) relates to the external source I2.optical-center.fr.
Page size can be reduced by 467.8 kB (19%)
2.4 MB
2.0 MB
In fact, the total size of Uk.optical-center.fr main page is 2.4 MB. This result falls beyond the top 1M of websites and identifies a large and not optimized web page that may take ages to load. 40% of websites need less resources to load. Images take 1.6 MB which makes up the majority of the site volume.
Potential reduce by 113.5 kB
HTML content can be minified and compressed by a website’s server. The most efficient way is to compress content using GZIP which reduces data amount travelling through the network between server and browser. HTML code on this page is well minified. It is highly recommended that content of this web page should be compressed using GZIP, as it can save up to 113.5 kB or 84% of the original size.
Potential reduce by 202.1 kB
Image size optimization can help to speed up a website loading time. The chart above shows the difference between the size before and after optimization. Obviously, Uk Optical Center needs image optimization as it can save up to 202.1 kB or 13% of the original volume. The most popular and efficient tools for JPEG and PNG image optimization are Jpegoptim and PNG Crush.
Potential reduce by 142.6 kB
It’s better to minify JavaScript in order to improve website performance. The diagram shows the current total size of all JavaScript files against the prospective JavaScript size after its minification and compression. It is highly recommended that all JavaScript files should be compressed and minified as it can save up to 142.6 kB or 22% of the original size.
Potential reduce by 9.7 kB
CSS files minification is very important to reduce a web page rendering time. The faster CSS files can load, the earlier a page can be rendered. Uk.optical-center.fr needs all CSS files to be minified and compressed as it can save up to 9.7 kB or 12% of the original size.
Number of requests can be reduced by 38 (64%)
59
21
The browser has sent 59 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Uk Optical Center. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 16 to 1 for JavaScripts and from 4 to 1 for CSS and as a result speed up the page load time.
uk.optical-center.fr
309 ms
www.optical-center.co.uk
560 ms
icon
27 ms
https3modules_FrontEnd_listCss.css
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css
38 ms
css2
44 ms
iframe_api
40 ms
jquery-3.4.1.min.js
457 ms
jssor.slider-22.2.10.mini.js
443 ms
https3tpl_frontend_js_facebox.js
431 ms
https3modules_FrontEnd_listJs.js
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lazyload.min.js
434 ms
jquery.jcarousel.min.js
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sdk.js
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jquery.nivo.slider.pack.3.2.js
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https3tpl_frontend_js_jquery.mousewheel.min.js
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https3tpl_frontend_js_jquery.sliderkit.1.9.1.pack.js
423 ms
https3includes_scripts_jquery.jcarousel.min.js
434 ms
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left-alignment.png
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switzerland.svg
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450 ms
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logo_oc.gif
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232 ms
JTUHjIg1_i6t8kCHKm4532VJOt5-QNFgpCvC73w5aX8.ttf
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sdk.js
51 ms
uk.optical-center.fr accessibility score
Contrast
These are opportunities to improve the legibility of your content.
Impact
Issue
Background and foreground colors do not have a sufficient contrast ratio.
ARIA
These are opportunities to improve the usage of ARIA in your application which may enhance the experience for users of assistive technology, like a screen reader.
Impact
Issue
ARIA IDs are not unique
Names and labels
These are opportunities to improve the semantics of the controls in your application. This may enhance the experience for users of assistive technology, like a screen reader.
Impact
Issue
<frame> or <iframe> elements do not have a title
Image elements do not have [alt] attributes
Form elements do not have associated labels
Links do not have a discernible name
Best practices
These items highlight common accessibility best practices.
Impact
Issue
[user-scalable="no"] is used in the <meta name="viewport"> element or the [maximum-scale] attribute is less than 5.
uk.optical-center.fr best practices score
Trust and Safety
Impact
Issue
Does not use HTTPS
Includes front-end JavaScript libraries with known security vulnerabilities
Ensure CSP is effective against XSS attacks
User Experience
Impact
Issue
Displays images with incorrect aspect ratio
Serves images with low resolution
General
Impact
Issue
Detected JavaScript libraries
Missing source maps for large first-party JavaScript
uk.optical-center.fr SEO score
Crawling and Indexing
To appear in search results, crawlers need access to your app.
Impact
Issue
Links are not crawlable
Content Best Practices
Format your HTML in a way that enables crawlers to better understand your app’s content.
Impact
Issue
Image elements do not have [alt] attributes
Mobile Friendly
Make sure your pages are mobile friendly so users don’t have to pinch or zoom in order to read the content pages. [Learn more](https://developers.google.com/search/mobile-sites/).
Impact
Issue
Document uses legible font sizes
EN
EN
UTF-8
Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Uk.optical-center.fr can be misinterpreted by Google and other search engines. Our service has detected that English is used on the page, and it matches the claimed language. Our system also found out that Uk.optical-center.fr main page’s claimed encoding is utf-8. Use of this encoding format is the best practice as the main page visitors from all over the world won’t have any issues with symbol transcription.
uk.optical-center.fr
Open Graph description is not detected on the main page of Uk Optical Center. Lack of Open Graph description can be counter-productive for their social media presence, as such a description allows converting a website homepage (or other pages) into good-looking, rich and well-structured posts, when it is being shared on Facebook and other social media. For example, adding the following code snippet into HTML <head> tag will help to represent this web page correctly in social networks: