Bausch + Lomb hits all-time low on quarterly surprise loss

** U.S.-listed shares of contact lens maker Bausch + Lomb's BLCO.TO, BLCO.N fall 15.6% to $11.6, hitting all-time low

** Stock set for its worst day ever, if losses hold

** BLCO posts Q1 adj. loss of 15 cents per share, compared with analysts' estimated profit of 3 cents per share, according to data compiled by LSEG

** Co reports Q1 revenue of $1.14 billion vs estimates of $1.15 billion

** However, co raised its annual revenue forecast to the range of $5 billion to $5.1 billion compared to the previous projection of $4.95 billion to $5.05 billion

** Brokerage Evercore ISI says "while we expected annual forecast cut on enVista recall and tariffs, the Q1 margin and EPS miss was unexpected"

** Brokerage believes BLCO "needs to demonstrate consistency in earnings and margins, and volatility in some of these metrics is not helping the stock"

** As of last close, BLCO has fallen 36% YTD