I can really advice you to take zealut. In another forum I've written about this. It will regulate you vision and will help to prevent problems concerning iris.
here is some information
Antioxidant, retina protective, neuroprotective, angioprotective, normalizes metabolic processes in an eye tissue.
Recommended for:
Dystrophic disease of retina different origin.
Age-related macular degeneration
Inborn macula dystrophy
Myopic retinopathies
Diabetic retinopathies
Post thrombotic retinopathies
Neuropathy glaucoma
Cataract
Healing acceleration after eye surgery
Visual loading systematic computer work in any age (computer visual syndrome CVS)
Ametropia and ambleopia, especially during pleoptic treatment
Druing work, connected with rich light impact (welding, soffits);
During long contact with huge water or snow surfaces
Eye structure age-specific changings slowdown (age-related macular degeneration, cataract, viteous body destruction, iris subotrophy and other) connected with aging;
Eye desease preventon during cardiovascular desease, rheumatoid arthritis, diabetes