Tools & Wizards About Us
preservision.com screenshot

Report Summary

  • 27

    Performance

    Renders faster than
    46% of other websites

  • 83

    Accessibility

    Visual factors better than
    that of 54% of websites

  • 75

    Best Practices

    More advanced features
    available than in
    35% of websites

  • 84

    SEO

    Google-friendlier than
    52% of websites

preservision.com

Age-Related Macular Degeneration Eye Vitamins from Bausch + Lomb

Page Load Speed

1.2 sec in total

First Response

310 ms

Resources Loaded

697 ms

Page Rendered

185 ms

preservision.com screenshot

About Website

Click here to check amazing Preservision content for United States. Otherwise, check out these important facts you probably never knew about preservision.com

PreserVision Eye Vitamins from Bausch + Lomb are designed for individuals diagnosed with moderate to advanced age-related macular degeneration (AMD).

Visit preservision.com

Key Findings

We analyzed Preservision.com page load time and found that the first response time was 310 ms and then it took 882 ms to load all DOM resources and completely render a web page. This is quite a good result, as only 20% of websites can load faster.

Performance Metrics

preservision.com performance score

27

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value3.2 s

42/100

10%

LCP (Largest Contentful Paint)

Value6.6 s

8/100

25%

SI (Speed Index)

Value7.4 s

28/100

10%

TBT (Total Blocking Time)

Value800 ms

36/100

30%

CLS (Cumulative Layout Shift)

Value0.269

45/100

15%

TTI (Time to Interactive)

Value17.7 s

4/100

10%

Network Requests Diagram

www.preservision.com

310 ms

default.css

9 ms

module.css

13 ms

module.css

12 ms

module.css

15 ms

Our browser made a total of 63 requests to load all elements on the main page. We found that 87% of them (55 requests) were addressed to the original Preservision.com, 5% (3 requests) were made to Google-analytics.com and 3% (2 requests) were made to Cdn-akamai.mookie1.com. The less responsive or slowest element that took the longest time to load (310 ms) belongs to the original domain Preservision.com.

Page Optimization Overview & Recommendations

Page size can be reduced by 864.0 kB (46%)

Content Size

1.9 MB

After Optimization

1.0 MB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Preservision.com main page is 1.9 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. 70% of websites need less resources to load. Javascripts take 894.4 kB which makes up the majority of the site volume.

HTML Optimization

-74%

Potential reduce by 31.7 kB

  • Original 42.6 kB
  • After minification 36.5 kB
  • After compression 10.9 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 6.1 kB, which is 14% 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 31.7 kB or 74% of the original size.

Image Optimization

-3%

Potential reduce by 26.6 kB

  • Original 768.9 kB
  • After minification 742.3 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. Preservision images are well optimized though.

JavaScript Optimization

-73%

Potential reduce by 652.3 kB

  • Original 894.4 kB
  • After minification 875.3 kB
  • After compression 242.1 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 652.3 kB or 73% of the original size.

CSS Optimization

-89%

Potential reduce by 153.4 kB

  • Original 172.3 kB
  • After minification 125.9 kB
  • After compression 18.9 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. Preservision.com needs all CSS files to be minified and compressed as it can save up to 153.4 kB or 89% of the original size.

Requests Breakdown

Number of requests can be reduced by 41 (66%)

Requests Now

62

After Optimization

21

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 62 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Preservision. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 25 to 1 for JavaScripts and from 7 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

www.preservision.com

www.preservision.com

310 ms

default.css

default.css

9 ms

module.css

module.css

13 ms

module.css

module.css

12 ms

module.css

module.css

15 ms

portal.css

portal.css

14 ms

main.less

main.less

16 ms

style.css

style.css

14 ms

jquery.js

jquery.js

23 ms

jquery-migrate.js

jquery-migrate.js

33 ms

jquery-ui.js

jquery-ui.js

36 ms

WebResource.axd

WebResource.axd

35 ms

WebResource.axd

WebResource.axd

34 ms

simple.js

simple.js

34 ms

Telerik.Web.UI.WebResource.axd

Telerik.Web.UI.WebResource.axd

58 ms

dnn.js

dnn.js

65 ms

dnn.modalpopup.js

dnn.modalpopup.js

56 ms

jquery.hoverintent.min.js

jquery.hoverintent.min.js

63 ms

dnncore.js

dnncore.js

63 ms

dnn.servicesframework.js

dnn.servicesframework.js

63 ms

dnn.jquery.js

dnn.jquery.js

66 ms

jquery.r2iResponsive.js

jquery.r2iResponsive.js

71 ms

jquery.equalheights.js

jquery.equalheights.js

68 ms

modernizer.js

modernizer.js

70 ms

skin.js

skin.js

68 ms

jquery.cookie.js

jquery.cookie.js

72 ms

jcarousel.js

jcarousel.js

69 ms

ga.js

ga.js

38 ms

bauschLombLogo.png

bauschLombLogo.png

37 ms

mobile-ecp-button.png

mobile-ecp-button.png

37 ms

PreserVision-Logo.png

PreserVision-Logo.png

37 ms

mobile-nav-button.png

mobile-nav-button.png

36 ms

slide-1-w-button.png

slide-1-w-button.png

73 ms

slide-2-w-button.png

slide-2-w-button.png

72 ms

pv-mobile-homepage-image.png

pv-mobile-homepage-image.png

71 ms

Homecrop-1.png

Homecrop-1.png

69 ms

WatchVideos.png

WatchVideos.png

70 ms

initWidgets.js

initWidgets.js

36 ms

footer-twitter.png

footer-twitter.png

69 ms

footer-fb.png

footer-fb.png

70 ms

join-joy-of-sight-rollover.png

join-joy-of-sight-rollover.png

71 ms

bg-img-home.jpg

bg-img-home.jpg

65 ms

bg-img-home-curve.png

bg-img-home-curve.png

66 ms

shadow-home.png

shadow-home.png

68 ms

ecp-center.png

ecp-center.png

63 ms

ecp-left.png

ecp-left.png

64 ms

ecp-right.png

ecp-right.png

63 ms

ecp-edge.png

ecp-edge.png

65 ms

mainNavBg.png

mainNavBg.png

65 ms

mainNavDivider.png

mainNavDivider.png

65 ms

down-icn.png

down-icn.png

65 ms

DotNetNukeAjaxShared.js

DotNetNukeAjaxShared.js

62 ms

_Incapsula_Resource

_Incapsula_Resource

62 ms

up-icn.png

up-icn.png

35 ms

__utm.gif

__utm.gif

23 ms

__utm.gif

__utm.gif

15 ms

LightningBolt.js

LightningBolt.js

9 ms

widgets.js

widgets.js

35 ms

_Incapsula_Resource

_Incapsula_Resource

5 ms

utag.js

utag.js

180 ms

x71.html

x71.html

4 ms

jquery.min.js

jquery.min.js

5 ms

imp

imp

3 ms

Accessibility Review

preservision.com accessibility score

83

Accessibility Issues

Contrast

These are opportunities to improve the legibility of your content.

Impact

Issue

High

Background and foreground colors do not have a sufficient contrast ratio.

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

Image elements do not have [alt] attributes

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

preservision.com best practices score

75

Areas of Improvement

Trust and Safety

Impact

Issue

High

Does not use HTTPS

High

Includes front-end JavaScript libraries with known security vulnerabilities

Low

Ensure CSP is effective against XSS attacks

General

Impact

Issue

Low

Detected JavaScript libraries

High

Browser errors were logged to the console

High

Missing source maps for large first-party JavaScript

SEO Factors

preservision.com SEO score

84

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

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

High

Tap targets are not sized appropriately

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 Preservision.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 Preservision.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

preservision.com

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