Document and Entity Information - shares	9 Months Ended
	Sep. 30, 2021	Oct. 29, 2021
Cover [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Sep. 30, 2021
Document Fiscal Year Focus	2021
Document Fiscal Period Focus	Q3
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	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, par value $0.001 per share
Security Exchange Name	NASDAQ
Entity Common Stock, Shares Outstanding		27,353,915
Document Quarterly Report	true
Document Transition Report	false