Document and Entity Information - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Mar. 31, 2022
Cover [Abstract]
Document Type	10-K/A
Amendment Flag	true
Document Period End Date	Dec. 31, 2021
Document Fiscal Year Focus	2021
Document Fiscal Period Focus	FY
Entity Registrant Name	RxSight, Inc.
Entity Central Index Key	0001111485
Entity Tax Identification Number	94-3268801
Current Fiscal Year End Date	--12-31
Entity Current Reporting Status	Yes
Entity Voluntary Filers	Yes
Entity Well-known Seasoned Issuer	No
Entity Filer Category	Non-accelerated Filer
Entity File Number	001-40690
Entity Shell Company	false
Entity Emerging Growth Company	true
Entity Ex Transition Period	true
Entity Small Business	true
Entity Interactive Data Current	Yes
Entity Incorporation, State or Country Code	DE
Entity Address, Address Line One	100 Columbia
Entity Address, City or Town	Aliso Viejo
Entity Address, State or Province	CA
Entity Address, Postal Zip Code	92656
City Area Code	949
Local Phone Number	521-7830
Trading Symbol	RXST
Title of 12(b) Security	Common stock, $0.001 par value per share
Security Exchange Name	NASDAQ
Entity Common Stock, Shares Outstanding		27,485,685
Document Annual Report	true
Document Transition Report	false
Entity Public Float	$ 236
ICFR Auditor Attestation Flag	false
Amendment Description	RxSight, Inc. (the “Company”) is filing this Amendment No. 1 (this “Amendment No. 1”) to its Annual Report on Form 10-K for the fiscal year ended December 31, 2021, which was originally filed with the Securities and Exchange Commission (“SEC”) on March 8, 2022 (the “Original Form 10-K”) as an exhibits-only filing that updates, amends and supplements Part IV, Item 15 of the Original Form 10-K for the purpose of correctly incorporating by reference Exhibit 3.2, which was inadvertently incorrectly incorporated by reference in the Original Form 10-K. In addition, as required by Rule 12b-15 under the Securities and Exchange Act of 1934, as amended, this Amendment No. 1 includes new Exhibits 31.1 and 31.2, certifications of our Principal Executive Officer and Principal Financial Officer, pursuant to Section 302 of the Sarbanes-Oxley Act of 2002, and new Exhibits 32.1 and 32.2, certifications of our Principal Executive Officer and Principal Financial Officer, pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.This Amendment No.1 does not affect any other parts of, or exhibits to, the Original Form 10-K, and those unaffected parts or exhibits are not included in this Amendment No. 1. Except as expressly stated in this Amendment No. 1, the Original Form 10-K continues to speak as of the date of the original filing of the Original Form 10-K, and the Company has not updated the disclosure contained in this Amendment No. 1 to reflect events that have occurred since the filing of the Original Form 10-K. Accordingly, this Amendment No. 1 must be read in conjunction with the Company’s other filings made with the SEC subsequent to the filing of the Original Form 10-K, including amendments to those filings, if any.
Auditor Name	Ernst & Young, LLP
Auditor Location	Irvine, California
Auditor Firm ID	42