The fixed dilated pupil after cataract surgery - Is it related to intraocular use of hypromellose?

Hypromeliose can be used as a viscoelastic substance during cataract surgery. Two-groups of patients, one group operated on using hypromeliose, the other using sodium hyaluronate as a viscoelastic substance were followed up 2-6 months postoperatively. A total of 16.7% of the eyes operated on using hypromeliose developed a non-reactive semidilated pupil whereas none ofthe eyes from the control group developed this phenomenon. It was concluded that there is a probable link between the intraocular use of hypromellose and abnormal pupils after cataract surgery.