What powers opto.ca?
Last seen Jun 2026 · 27 technologies across 15 categories
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Top search keywords
| Keyword | Position | Est. monthly visits |
|---|---|---|
| blepharitis | #86 | 390 |
| soft contact lenses | #5 | 380 |
| color vision deficiency test | #41 | 210 |
| myopic | #54 | 210 |
| hard contact lenses vs soft | #1 | 200 |
| multifocal | #4 | 190 |
| pterygium | #98 | 160 |
| is it bad to read in the dark | #1 | 150 |
| does reading in the dark damage your eyes | #1 | 150 |
| presbyopia | #40 | 130 |
| hyperopia | #63 | 100 |
| fun facts about your eyes | #3 | 86 |
| blue light | #42 | 78 |
| does reading in the dark strain your eyes | #2 | 78 |
| interesting eye facts | #2 | 72 |
| color deficiency | #21 | 70 |
| peripheral vision | #28 | 70 |
| peripheral vision | #28 | 70 |
| peripheral vision | #28 | 70 |
| peripheral sight | #34 | 70 |
| peripheral sight | #34 | 70 |
| peripheral sight | #34 | 70 |
| cross eyes | #77 | 64 |
| binocular dysfunction | #83 | 57 |
| pd distance | #42 | 57 |
The site's top keywords in Google (US), with the visits each one is estimated to bring per month.
Top backlinks
Top links pointing at the site, one per source domain, strongest first. The anchor text opens the page carrying the link.
Audience
- 55% phone
- 42% desktop
- 3% tablet
Canada
France
United States
India
Countries where the site has Chrome traffic, strongest markets first.
Open Page Rank
6.64 / 10 · ranked #66,711 of all domains
419 referring domains · OpenPageRank
Search traffic
5,900 est. monthly organic visits (US)
2,826 keywords in Google's top 30
Core Web Vitals
| LCP | 2.1 s |
| INP | 50 ms |
| CLS | 0.05 |
| TTFB | 600 ms |
Real user p75, Chrome UX Report, Jun 2026.
Page
- Language: English
- Weight: 4.2 MB · 55 requests
- Structured data: Twitter Cards
Homepage as crawled by the HTTP Archive, Jul 2026.
Subdomains
| Host | Techs |
|---|---|
| opto.ca | 17 |
| learning.opto.ca | 13 |
Full technology history →
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Recent changes
- dropped Apache HTTP Server May 2026
- detected HTTP/3 Apr 2026
- detected LiteSpeed Apr 2026