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    Exploring SLT efficacy for prior incisional glaucoma surgery

    Retrospective study finds treatment lowered IOP by more than 20% in study subset


    About the study

    Researchers analyzed IOP before SLT as well as at 1-, 6-, and 12-month intervals after SLT.

    Researchers found that both the treatment and control group patients had a statistically significant drop in IOP at 1 month.

    Before SLT, the mean IOP was 19.2 mm Hg in the prior glaucoma surgery group, which dropped by a mean of 9.3% (1.8 mm Hg). In the group with no prior surgery, the mean IOP was 20.6 mm Hg, which also dropped by 8.8% (1.8 mm Hg).

    Thirty-five eyes in the prior glaucoma surgery group and 29 in the no prior surgery glaucoma group had a second SLT.

    Overall, one or two SLT treatments led to a more than 20% IOP reduction in 28.3% and 24.5% of eyes after the first SLT in the prior glaucoma surgery and no prior glaucoma surgery groups.

    “Overall, 27.9% of prior glaucoma surgery and 31.7% of no prior surgery patients had a 20% or greater IOP drop at one year,” Dr. Kammerdiener said.

    Researchers also analyzed how SLT helped patients with an IOP of 21 mm Hg or higher, and they found a 15% to 20% drop.

    “That’s important because if those patients are noncompliant or on maximum medical therapy and they still have higher pressures, this helps us to bring their pressures down,” she said.

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