Tools & Wizards About Us
lens.nl screenshot

Report Summary

  • 38

    Performance

    Renders faster than
    57% of other websites

  • 68

    Accessibility

    Visual factors better than
    that of 33% of websites

  • 92

    Best Practices

    More advanced features
    available than in
    80% of websites

  • 92

    SEO

    Google-friendlier than
    74% of websites

lens.nl

Uw specialist voor lenzen & brillen

Page Load Speed

6 sec in total

First Response

1.7 sec

Resources Loaded

4 sec

Page Rendered

324 ms

lens.nl screenshot

About Website

Welcome to lens.nl homepage info - get ready to check Lens best content right away, or after learning these important things about lens.nl

Lens is uw specialist voor lenzen, brillen en gehoor. Met 8 filialen door Nederland bent u altijd welkom. Benieuwd wat wij te bieden hebben? Maak nu een afspraak.

Visit lens.nl

Key Findings

We analyzed Lens.nl page load time and found that the first response time was 1.7 sec and then it took 4.3 sec to load all DOM resources and completely render a web page. This is a poor result, as 70% of websites can load faster.

Performance Metrics

lens.nl performance score

38

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value2.8 s

55/100

10%

LCP (Largest Contentful Paint)

Value9.7 s

0/100

25%

SI (Speed Index)

Value8.1 s

21/100

10%

TBT (Total Blocking Time)

Value290 ms

79/100

30%

CLS (Cumulative Layout Shift)

Value0.489

17/100

15%

TTI (Time to Interactive)

Value8.4 s

39/100

10%

Network Requests Diagram

www.lens.nl

1710 ms

7ea29b50d7598b8c5e21f289ba926142.css

517 ms

d7ed49dca98dbdd50e482c46ab9850f3.js

548 ms

css

24 ms

analytics.js

32 ms

Our browser made a total of 28 requests to load all elements on the main page. We found that 82% of them (23 requests) were addressed to the original Lens.nl, 7% (2 requests) were made to Google-analytics.com and 4% (1 request) were made to Fonts.googleapis.com. The less responsive or slowest element that took the longest time to load (1.7 sec) belongs to the original domain Lens.nl.

Page Optimization Overview & Recommendations

Page size can be reduced by 887.4 kB (30%)

Content Size

2.9 MB

After Optimization

2.1 MB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Lens.nl 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. 35% of websites need less resources to load. Images take 1.9 MB which makes up the majority of the site volume.

HTML Optimization

-80%

Potential reduce by 57.0 kB

  • Original 71.7 kB
  • After minification 64.9 kB
  • After compression 14.7 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 57.0 kB or 80% of the original size.

Image Optimization

-1%

Potential reduce by 27.8 kB

  • Original 1.9 MB
  • After minification 1.9 MB

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. Lens images are well optimized though.

JavaScript Optimization

-76%

Potential reduce by 427.9 kB

  • Original 562.4 kB
  • After minification 433.2 kB
  • After compression 134.5 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 427.9 kB or 76% of the original size.

CSS Optimization

-90%

Potential reduce by 374.7 kB

  • Original 418.2 kB
  • After minification 254.2 kB
  • After compression 43.5 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. Lens.nl needs all CSS files to be minified and compressed as it can save up to 374.7 kB or 90% of the original size.

Requests Breakdown

We found no issues to fix!

Requests Now

24

After Optimization

24

  • Images
  • JavaScript
  • CSS

The browser has sent 24 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Lens. According to our analytics all requests are already optimized.

Network Requests Diagram

www.lens.nl

www.lens.nl

1710 ms

7ea29b50d7598b8c5e21f289ba926142.css

7ea29b50d7598b8c5e21f289ba926142.css

517 ms

d7ed49dca98dbdd50e482c46ab9850f3.js

d7ed49dca98dbdd50e482c46ab9850f3.js

548 ms

css

css

24 ms

analytics.js

analytics.js

32 ms

logo.png

logo.png

130 ms

Lens_Utrecht_Contact.jpg

Lens_Utrecht_Contact.jpg

489 ms

Lens_Arnhem_Contact.jpg

Lens_Arnhem_Contact.jpg

425 ms

Lens_Deventer_Contact.jpg

Lens_Deventer_Contact.jpg

497 ms

Lens_DeMeern_Contact.jpg

Lens_DeMeern_Contact.jpg

497 ms

050-FW2016_1440X370px.jpg

050-FW2016_1440X370px.jpg

829 ms

050-FW2016-750x193px.jpg

050-FW2016-750x193px.jpg

605 ms

unnamed-10.jpg

unnamed-10.jpg

806 ms

unnamed-11.jpg

unnamed-11.jpg

1213 ms

unnamed-12.jpg

unnamed-12.jpg

1157 ms

Nieuws_Lens.jpg

Nieuws_Lens.jpg

672 ms

Lens-Oogcontroles.jpg

Lens-Oogcontroles.jpg

776 ms

Lens_Zorgverzekering_opticien.jpg

Lens_Zorgverzekering_opticien.jpg

763 ms

link-separator.png

link-separator.png

836 ms

zhcz-_WihjSQC0oHJ9TCYL3hpw3pgy2gAi-Ip7WPMi0.woff

zhcz-_WihjSQC0oHJ9TCYL3hpw3pgy2gAi-Ip7WPMi0.woff

37 ms

ThemeIcons.woff

ThemeIcons.woff

854 ms

collect

collect

19 ms

collect

collect

76 ms

jpeg.jpg

jpeg.jpg

774 ms

lens-fine-dag-sferisch.jpg

lens-fine-dag-sferisch.jpg

799 ms

regard-zacht.jpg

regard-zacht.jpg

818 ms

ajax-loader.gif

ajax-loader.gif

839 ms

957fd587174580bf45d062a025cc66a9.css

957fd587174580bf45d062a025cc66a9.css

92 ms

Accessibility Review

lens.nl accessibility score

68

Accessibility Issues

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

High

[aria-*] attributes do not match their roles

High

[aria-hidden="true"] elements contain focusable descendents

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

Image elements do not have [alt] attributes

High

Links do not have a discernible name

Best Practices

lens.nl best practices score

92

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

Missing source maps for large first-party JavaScript

SEO Factors

lens.nl SEO score

92

Search Engine Optimization Advices

Content Best Practices

Format your HTML in a way that enables crawlers to better understand your app’s content.

Impact

Issue

High

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

High

Document uses legible font sizes

Language and Encoding

  • Language Detected

    NL

  • Language Claimed

    NL

  • Encoding

    UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Lens.nl can be misinterpreted by Google and other search engines. Our service has detected that Dutch is used on the page, and it matches the claimed language. Our system also found out that Lens.nl 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

lens.nl

Open Graph description is not detected on the main page of Lens. 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: