5 sec in total
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3.6 sec
686 ms
Welcome to blueoptical.com homepage info - get ready to check Blue Optical best content right away, or after learning these important things about blueoptical.com
Blue Optics, formerly known as Shanghai Blue Optics Lens Industry Co., Ltd which was established in year 1995., is one of the biggest optical enterprise in Asia-Pacific regions whose production coveri...
Visit blueoptical.comWe analyzed Blueoptical.com page load time and found that the first response time was 714 ms and then it took 4.3 sec to load all DOM resources and completely render a web page. This is a poor result, as 65% of websites can load faster.
blueoptical.com performance score
name
value
score
weighting
Value1.2 s
99/100
10%
Value4.6 s
34/100
25%
Value7.0 s
32/100
10%
Value260 ms
83/100
30%
Value0.469
18/100
15%
Value4.7 s
80/100
10%
714 ms
424 ms
410 ms
420 ms
826 ms
Our browser made a total of 29 requests to load all elements on the main page. We found that all of those requests were addressed to Blueoptical.com and no external sources were called. The less responsive or slowest element that took the longest time to load (1.6 sec) belongs to the original domain Blueoptical.com.
Page size can be reduced by 121.4 kB (4%)
2.9 MB
2.8 MB
In fact, the total size of Blueoptical.com main page is 2.9 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. 55% of websites need less resources to load. Images take 2.5 MB which makes up the majority of the site volume.
Potential reduce by 48.6 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. This page needs HTML code to be minified as it can gain 17.8 kB, which is 32% of the original size. It is highly recommended that content of this web page should be compressed using GZIP, as it can save up to 48.6 kB or 88% of the original size.
Potential reduce by 34.0 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. Blue Optical images are well optimized though.
Potential reduce by 26.4 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 26.4 kB or 11% of the original size.
Potential reduce by 12.4 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. Blueoptical.com needs all CSS files to be minified and compressed as it can save up to 12.4 kB or 17% of the original size.
We found no issues to fix!
25
25
The browser has sent 25 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Blue Optical. According to our analytics all requests are already optimized.
blueoptical.com
714 ms
basic.css
424 ms
index_en.css
410 ms
lang_json_en.js
420 ms
basic.js
826 ms
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web-icons.woff
754 ms
index_en.js
666 ms
254 ms
ajax-loader.gif
219 ms
loading.gif
218 ms
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slick.woff
829 ms
blueoptical.com accessibility score
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-*] attributes do not match their roles
[aria-hidden="true"] elements contain focusable descendents
ARIA input fields do not have accessible names
Elements with an ARIA [role] that require children to contain a specific [role] are missing some or all of those required children.
ARIA toggle fields do not have accessible names
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
Buttons do not have an accessible name
Contrast
These are opportunities to improve the legibility of your content.
Impact
Issue
Background and foreground colors do not have a sufficient contrast ratio.
Navigation
These are opportunities to improve keyboard navigation in your application.
Impact
Issue
Heading elements are not in a sequentially-descending order
Internationalization and localization
These are opportunities to improve the interpretation of your content by users in different locales.
Impact
Issue
<html> element does not have a [lang] attribute
Tables and lists
These are opportunities to improve the experience of reading tabular or list data using assistive technology, like a screen reader.
Impact
Issue
Lists do not contain only <li> elements and script supporting elements (<script> and <template>).
List items (<li>) are not contained within <ul> or <ol> parent elements.
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.
blueoptical.com 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
Serves images with low resolution
General
Impact
Issue
Detected JavaScript libraries
Browser errors were logged to the console
blueoptical.com SEO score
Crawling and Indexing
To appear in search results, crawlers need access to your app.
Impact
Issue
Links are not crawlable
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
Tap targets are not sized appropriately
EN
N/A
UTF-8
Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Blueoptical.com can be misinterpreted by Google and other search engines. Our service has detected that English is used on the page, and neither this language nor any other was claimed in <html> or <meta> tags. Our system also found out that Blueoptical.com 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.
blueoptical.com
Open Graph description is not detected on the main page of Blue Optical. 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: