LASIK versus Lasix: The Difference is Horses

LASIK versus Lasix: The Difference is Horses

by Brian Chou, OD, FAAO, FSLS

  • November 14, 2023

LASIK and Lasix are pronounced similarly and sometimes get confused with one another. Yet they are completely different. LASIK is a type of eye surgery. Lasix is the trade name of a drug called furosemide, used to reduce fluid in the body.


LASIK, or laser-assisted in situ keratomileusis, is a commonly performed refractive eye surgery to reduce dependence on glasses and contact lenses. About 10 million Americans have had LASIK since FDA approval in 1999. There is also a procedure called LASEK, or laser-assisted subepithelial keratectomy, which is modified form of a more superficial laser treatment.


Lasix is a trademark for furosemide, a diuretic or drug that increases urine production. Common conditions where Lasix is prescribed include hypertension and congestive heart failure.

In the past, Lasix was commonly given to racehorses, to prevent exercise-induced pulmonary hemorrhage. This type of hemorrhaging in the lungs is common in thoroughbred horseracing due to strenuous exertion. Lasix is getting phased out of some major United States horse races.

ReVision Optometry is a referral-based practice in San Diego providing scleral contact lens services for patients with keratoconus and other complex eye conditions. To schedule an appointment, request your examination online or call our office at 619.299.6064.


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