Disaggregation of Revenues, Geographic Sales and Product Sales - Additional Information (Details)	12 Months Ended
Jan. 01, 2021 Segment Country
Geographic and Product Data [Line Items]
Number of countries in which Company operates \| Country	75
Number of operating segments \| Segment	1
Sales Revenue, Net \| Geographic Concentration Risk [Member] \| Other than China and Japan [Member] \| Maximum
Geographic and Product Data [Line Items]
Concentration risk, percentage	10.00%
Sales Revenue, Net \| Product Concentration Risk [Member] \| Ophthalmic Surgical Product [Member]
Geographic and Product Data [Line Items]
Concentration risk, percentage	100.00%

For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
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Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef
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