My father aged of 68 years old, healthy life styled person underwent of 2 eyes cataract done in the recent past of 3-4 years past, suddenly complains that his right eye sight has considerably come down without any strong reason. Being myself stationed outside city and would be reaching hometown by this weekend. Now my doubt is that whether any heart stroke effect or neurological effect could a possibility of reason of? Being totally free from diabetics. On regular basis he takes 5mg amlogard bp control tablet. Kindly advice for if any issue to be attended urgently. Regards.