Effects of Green Tea Consumption on Primary Glaucoma
Trial Parameters
Brief Summary
The goal of this randomised control trial is to learn about the effect of green tea consumption on patients with primary glaucoma. The main questions to answer are: 1. Is there any difference of intraocular pressure (IOP) in patient with primary glaucoma after 1 month, 3 months and 6 months who is consuming green tea compared to patient not consuming green tea? 2. Is there any difference of retina nerve fibre layer in patient with primary glaucoma after 1 month, 3months and 6 months who is consuming green tea compared to patient not consuming green tea? Researchers will compare patients with primary glaucoma who are consuming green tea and normal daily drinking to see if any affect to intraocular pressure and retina nerve fibre layer.
Eligibility Criteria
Inclusion Criteria: * Patient with confirmed diagnosis of primary glaucoma (POAG/PACG/NTG) that achieve target IOP with medical therapy at least for 6 months. * Never consume green tea as daily drinks. Exclusion Criteria: * Dense cataract with Lens Opacity Classification Sytem (LOCS II) of more than grade 2 * Any other ocular media opacity that may interfere with OCT imaging ( eg: cornea scar/vitreous haemorrhage) * Any history of optic neuropathy * History of glaucoma or retinal surgery * Macular degeneration and retinal disorder * Patient with caffein sensitive that causes unpleasant reaction (eg: palpitation, insomnia, nausea, constipation) * Allergic to green tea