Changes in Prostaglandin Levels in Patients Undergoing Femtosecond Laser-Assisted Cataract Surgery

PURPOSE: To investigate the intraocular prostaglandin concentrations after femtosecond laser treatment and the potential relationship to miosis. METHODS: Aqueous humor was collected from patients after femtosecond laser pretreatment and at the beginning of routine cataract surgery. The total prostaglandin and the prostaglandin E 2 concentrations were measured in two independent studies using an enzyme-linked immunoassay. RESULTS: A significantly higher level of prostaglandins was noted in the aqueous humor of patients immediately after femtosecond laser treatment. This could be confirmed in two studies consisting of independent patient populations (study I: control = 17.3 ± 4.0 pg/mL [n = 22], femtosecond laser [femto] = 182.1 ± 38.1 pg/mL [n = 22], P = .0001, and study II: control = 17.5 ± 1.4 pg/mL [n = 37], femto: 377.1 ± 83.6 pg/ mL [n = 35], P = .00004). A significant increase of prostaglandin E 2 was noted in two measurements (study III: control = 4.5 ± 1.9 pg/mL [n = 13], femto: 19.2 ± 2.5 pg/mL [n = 20], P = .0002, and study IV: control = 11.3 ± 1.6 pg/mL [n = 35], femto: 60.3 ± 16.1 pg/mL [n = 36], P = .004). No correlation was noted between age or cataract density and prostaglandin/prostaglandin E 2 level or between corneal incision, suction time, or laser time in the femto groups and prostaglandin/prostaglandin E 2 level. CONCLUSIONS: Prostaglandins rise immediately after femtosecond laser treatment. Future patients should perhaps be treated with non-steroidal anti-inflammatory drugs to maintain mydriasis before undergoing femto-second laser treatment for cataract surgery. [ J Refract Surg. 2013;29(11):742–747.]