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zeissvisioncentre.com screenshot

Report Summary

  • 23

    Performance

    Renders faster than
    41% of other websites

  • 84

    Accessibility

    Visual factors better than
    that of 56% of websites

  • 83

    Best Practices

    More advanced features
    available than in
    55% of websites

  • 93

    SEO

    Google-friendlier than
    83% of websites

zeissvisioncentre.com

Welcome to ZEISS Vision Care

Page Load Speed

2.2 sec in total

First Response

262 ms

Resources Loaded

1.9 sec

Page Rendered

1 ms

zeissvisioncentre.com screenshot

About Website

Click here to check amazing ZEISS Vision Centre content. Otherwise, check out these important facts you probably never knew about zeissvisioncentre.com

✓ YOUR visual world is unique. ✓ Access the full experience.

Visit zeissvisioncentre.com

Key Findings

We analyzed Zeissvisioncentre.com page load time and found that the first response time was 262 ms and then it took 1.9 sec to load all DOM resources and completely render a web page. This is quite a good result, as only 40% of websites can load faster.

Performance Metrics

zeissvisioncentre.com performance score

23

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value4.0 s

24/100

10%

LCP (Largest Contentful Paint)

Value6.0 s

13/100

25%

SI (Speed Index)

Value10.9 s

6/100

10%

TBT (Total Blocking Time)

Value3,170 ms

2/100

30%

CLS (Cumulative Layout Shift)

Value0

100/100

15%

TTI (Time to Interactive)

Value12.2 s

15/100

10%

Network Requests Diagram

zeissvisioncentre.com

262 ms

www.zeissvisioncentre.com

474 ms

vision

383 ms

home.html

472 ms

ttxp-cz-2-3-0-2-8-2-min.js

16 ms

Our browser made a total of 14 requests to load all elements on the main page. We found that 14% of them (2 requests) were addressed to the original Zeissvisioncentre.com, 50% (7 requests) were made to Zeiss.com and 21% (3 requests) were made to Cdn.cookielaw.org. The less responsive or slowest element that took the longest time to load (474 ms) belongs to the original domain Zeissvisioncentre.com.

Page Optimization Overview & Recommendations

Page size can be reduced by 223.3 kB (39%)

Content Size

576.3 kB

After Optimization

352.9 kB

  • HTML
  • JavaScript
  • CSS

In fact, the total size of Zeissvisioncentre.com main page is 576.3 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. 40% of websites need less resources to load. Javascripts take 323.4 kB which makes up the majority of the site volume.

HTML Optimization

-90%

Potential reduce by 137.1 kB

  • Original 152.8 kB
  • After minification 128.3 kB
  • After compression 15.6 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 24.5 kB, which is 16% 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 137.1 kB or 90% of the original size.

JavaScript Optimization

-26%

Potential reduce by 85.5 kB

  • Original 323.4 kB
  • After minification 323.4 kB
  • After compression 237.8 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 85.5 kB or 26% of the original size.

CSS Optimization

-1%

Potential reduce by 662 B

  • Original 100.1 kB
  • After minification 100.1 kB
  • After compression 99.5 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. Zeissvisioncentre.com has all CSS files already compressed.

Requests Breakdown

Number of requests can be reduced by 5 (50%)

Requests Now

10

After Optimization

5

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 10 CSS, Javascripts, AJAX and image requests in order to completely render the main page of ZEISS Vision Centre. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 6 to 1 for JavaScripts and as a result speed up the page load time.

Network Requests Diagram

zeissvisioncentre.com

zeissvisioncentre.com

262 ms

www.zeissvisioncentre.com

www.zeissvisioncentre.com

474 ms

vision

vision

383 ms

home.html

home.html

472 ms

ttxp-cz-2-3-0-2-8-2-min.js

ttxp-cz-2-3-0-2-8-2-min.js

16 ms

jupiter-components.all.lc-b4555cafab3555bab77760b02106436e-lc.css

jupiter-components.all.lc-b4555cafab3555bab77760b02106436e-lc.css

24 ms

jupiter-components.all.lc-a77aa083d7e3e3cca7f43c233634216b-lc.js

jupiter-components.all.lc-a77aa083d7e3e3cca7f43c233634216b-lc.js

22 ms

otSDKStub.js

otSDKStub.js

127 ms

gtm.js

gtm.js

225 ms

symbols-sprite.svg

symbols-sprite.svg

41 ms

8993cba0-8683-43f1-9904-d63a3e023a9c.json

8993cba0-8683-43f1-9904-d63a3e023a9c.json

33 ms

jupiter-components.print.lc-f1cadb0c5e57ba2f53ae2ef60addeb4b-lc.css

jupiter-components.print.lc-f1cadb0c5e57ba2f53ae2ef60addeb4b-lc.css

7 ms

location

location

40 ms

otBannerSdk.js

otBannerSdk.js

19 ms

Accessibility Review

zeissvisioncentre.com accessibility score

84

Accessibility Issues

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

High

Buttons do not have an accessible name

High

Links do not have a discernible name

Best practices

These items highlight common accessibility best practices.

Impact

Issue

High

[user-scalable="no"] is used in the <meta name="viewport"> element or the [maximum-scale] attribute is less than 5.

Best Practices

zeissvisioncentre.com best practices score

83

Areas of Improvement

Trust and Safety

Impact

Issue

High

Does not use HTTPS

Low

Ensure CSP is effective against XSS attacks

General

Impact

Issue

Low

Detected JavaScript libraries

High

Browser errors were logged to the console

SEO Factors

zeissvisioncentre.com SEO score

93

Search Engine Optimization Advices

Crawling and Indexing

To appear in search results, crawlers need access to your app.

Impact

Issue

High

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

High

Document uses legible font sizes

Language and Encoding

  • Language Detected

    EN

  • Language Claimed

    EN

  • Encoding

    UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Zeissvisioncentre.com 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 Zeissvisioncentre.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.

Social Sharing Optimization

zeissvisioncentre.com

Open Graph data is detected on the main page of ZEISS Vision Centre. This is the best way to make the web page social media friendly. Here is how it looks like on Facebook: