What is the main cause of blindness in the world?

Diabetes is the leading cause of blindness in the world and cataracts are on the rise due to cataracts in the eyes of diabetics. Pakistan is the fifth largest country in the world in terms of diabetes with a large number of people suffering from diabetes. The biggest attack of this disease is on the eyes and black cataracts make the patient permanently blind. Dr. Khan Muhammad Nangrejo, in-charge of People's Medical University, I Ward, said that some of the high risk patients with diabetes There are those who have neo-visceral glaucoma and unbearable pain in the eyes. We do not have a machine to treat it and such patients have to be sent to private hospitals where expensive treatment is available. Prof. Azam Hussain Yousafani, Vice Chancellor of the People's Medical University, said that any of our government for the operation of glaucoma patients. There is no machine in the hospital. Dr. Saleem Faiz, Professor of Medicine for Glaucoma Patients, has appealed to the government to provide treatment facility for Glaucoma patients which is not available in any government hospital.