7.2 sec in total
2.3 sec
4.8 sec
106 ms
Welcome to retina.org.hk homepage info - get ready to check Retina best content right away, or after learning these important things about retina.org.hk
香港視網膜病變協會
Visit retina.org.hkWe analyzed Retina.org.hk page load time and found that the first response time was 2.3 sec and then it took 4.9 sec to load all DOM resources and completely render a web page. This is a poor result, as 70% of websites can load faster.
retina.org.hk performance score
name
value
score
weighting
Value4.3 s
18/100
10%
Value11.9 s
0/100
25%
Value8.4 s
18/100
10%
Value90 ms
98/100
30%
Value0.089
92/100
15%
Value6.2 s
62/100
10%
2289 ms
484 ms
478 ms
492 ms
983 ms
Our browser made a total of 24 requests to load all elements on the main page. We found that all of those requests were addressed to Retina.org.hk and no external sources were called. The less responsive or slowest element that took the longest time to load (2.3 sec) belongs to the original domain Retina.org.hk.
Page size can be reduced by 167.4 kB (55%)
305.5 kB
138.0 kB
In fact, the total size of Retina.org.hk main page is 305.5 kB. This result falls beyond the top 1M of websites and identifies a large and not optimized web page that may take ages to load. Only 10% of websites need less resources to load. Javascripts take 127.8 kB which makes up the majority of the site volume.
Potential reduce by 5.4 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 5.4 kB or 69% of the original size.
Potential reduce by 13.5 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, Retina needs image optimization as it can save up to 13.5 kB or 14% of the original volume. The most popular and efficient tools for JPEG and PNG image optimization are Jpegoptim and PNG Crush.
Potential reduce by 85.9 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 85.9 kB or 67% of the original size.
Potential reduce by 62.6 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. Retina.org.hk needs all CSS files to be minified and compressed as it can save up to 62.6 kB or 83% of the original size.
Number of requests can be reduced by 16 (70%)
23
7
The browser has sent 23 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Retina. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 10 to 1 for JavaScripts and from 8 to 1 for CSS and as a result speed up the page load time.
retina.org.hk
2289 ms
base-min.css
484 ms
fonts-min.css
478 ms
reset-min.css
492 ms
index.css
983 ms
alink.css
489 ms
pagination.css
1235 ms
html5.js
714 ms
jquery.min.js
1468 ms
jQuery.blockUI.js
976 ms
jquery.SuperSlide.js
1230 ms
jquery.tipInput.js
951 ms
styleswitch.js
1188 ms
tab_menu.js
1219 ms
jquery.jfontsize-1.0.js
1229 ms
browser_note.js
1425 ms
init.js
1464 ms
header_banner_02.gif
249 ms
small_201503141631582187.jpg
496 ms
noimg.gif
250 ms
small_201508031457598593.jpg
496 ms
small_201503141909542812.png
718 ms
gray.css
248 ms
only_txt.css
248 ms
retina.org.hk accessibility score
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
Image elements do not have [alt] attributes
Form elements do not have associated labels
retina.org.hk 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
retina.org.hk 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
JA
N/A
UTF-8
Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Retina.org.hk can be misinterpreted by Google and other search engines. Our service has detected that Japanese 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 Retina.org.hk 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.
retina.org.hk
Open Graph description is not detected on the main page of Retina. 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: