Comparison Of iStent to Laser in Exfoliation Glaucoma Helsinki Study Group

Inclusion Criteria: * Signed consent of information * Clinical significant cataract * Able to attend 12 month period * Mild to moderate exfoliation glaucoma according to European glaucoma society guidelines (EGS) * Group I stable glaucoma (IOP within individual target IOP), and group II unstable glaucoma (IOP above individual target IOP) with baseline glaucoma medication * Target IOP ≥16 * Able to understand Finnish, Swedish or English Exclusion Criteria: * Clinical set target IOP \< 16 mmHg in advanced glaucoma * Baseline IOP prior to enrolment ≥30 mmHg, and ≥3 glaucoma medications * Closed angle * Congenital angle anomaly * Clinically significant corneal dystrophy or other hindering corneal condition * Unable to use topical medical therapy * Central corneal thickness of less than 480um or more than 620um * Active uveitis, cystic macular edema (CME), exudative age-related macular degeneration, proliferative diabetic retinopathy or clinical significant macular edema, intraocular neoplasm, intraocular injections, intraocular lens luxation, phacodonesis. * Previous intraocular surgery, refractive surgery or cycloablation * Two or more prior SLT or laser trabeculoplasty * Unable to participate due to another medical disease or condition * Participating in another clinical trial