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Revenue from Contracts with Customers (Tables) | 12 Months Ended
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Dec. 31, 2021
Revenue from Contracts with Customers |
Schedule of disaggregation of revenue | The Company’s revenues disaggregated by product category and geography, for the years ended December 31, 2021, December 31, 2020 and December 31, 2019 was as follows (in thousands): ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Year ended
​ | ​ | December 31,
​ | ​ | United States | ​ | International | ​ | Total
​ |  | 2021 |  | 2020 |  | 2019 |  | 2021 |  | 2020 |  | 2019 |  | 2021 |  | 2020 |  | 2019
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Glaucoma | ​ | $ | 170,796 | ​ | $ | 133,719 | ​ | $ | 187,650 | ​ | $ | 61,181 | ​ | $ | 45,644 | ​ | $ | 43,317 | ​ | $ | 231,977 | ​ | $ | 179,363 | ​ | $ | 230,967
Corneal Health | ​ | ​ | 52,995 | ​ |  | 39,367 | ​ |  | 4,806 | ​ | ​ | 9,039 | ​ |  | 6,229 | ​ |  | 1,211 | ​ | ​ | 62,034 | ​ |  | 45,596 | ​ |  | 6,017
Total |  | $ | 223,791 | ​ | $ | 173,086 | ​ | $ | 192,456 | ​ | $ | 70,220 | ​ | $ | 51,873 | ​ | $ | 44,528 | ​ | $ | 294,011 | ​ | $ | 224,959 | ​ | $ | 236,984
​

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- Definition Tabular disclosure of disaggregation of revenue into categories depicting how nature, amount, timing, and uncertainty of revenue and cash flows are affected by economic factor. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=123351226&loc=SL49130545-203045 + Details
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