High IOP as a cause of sudden increased myopia after LASIK.

摘要

Among patients having laser in situ keratomileusis (LASIK) by 1 of us (A.K.), 2 complained of a sudden decrease in vision. The first was a 33-year-old woman who had LASIK in November 1999. The preoperative best corrected visual acuity (BCVA) was 20/20 in both eyes. The cycloplegic refraction was -2.75 -1.00 x 180 in the right eye and -2.50 -0.50 x 180 in the left eye. The intraocular pressure (IOP) was 18.00 mm Hg and 16.00 mm Hg, respectively. The postoperative refraction was -0.50 in the right eye and piano in the left eye; the uncorrected visual acuity (UCVA) was 20/25 and 20/20, respectively. At 6 weeks, the patient experienced a sudden decrease in UCVA to 20/200 in the right eye; the refraction changed to -2.00, and the IOP rose to 36.00 mm Hg while she was still using a dexamethasone drop twice a day. The steroid was discontinued and timoptol 0.50% started. Five days later, the IOP dropped to 14.00 mm Hg and the UCVA improved to 20/20 in both eyes. The refraction changed to piano.