The primary study objective is to compare the effectiveness of the combination of phacoemulsification with intraocular lens implant with ELIOS or competitor device in reducing IOP at 12 months postoperatively.

Inclusion Criteria:

1. Male or female subjects.
2. 40 years old or older.
3. Diagnosis of mild to moderate primary open-angle glaucoma, pseudoexfoliation glaucoma or pigmentary glaucoma:
4. Visually significant cataract eligible for phacoemulsification.

Exclusion Criteria:

1. All forms of angle closure glaucoma
2. Secondary glaucoma, including traumatic, neovascular, uveitic, lens-induced, steroid-induced, angle-recession, glaucoma associated with vascular disorders, and glaucoma associated with increased episcleral venous pressure
3. Congenital or developmental glaucoma
4. Prior incisional glaucoma surgery, intraocular surgery or ocular laser treatment of any type with the exception of selective laser trabeculoplasty (SLT) occurring a minimum of 6 months prior to the Screening visit