Machine learning for cataract classification/grading on ophthalmic imaging modalities: Survey

According to the World Health Organization (WHO), it is estimated that approximately 2.2 billion people suffer from visual impairment. Cataracts account for about 33% of visual impairment and are the number one cause of blindness (more than 50%) worldwide. Cataract patients can improve life quality and vision through early intervention and cataract surgery, which are efficient methods to reduce the blindness ratio and cataract-blindness burden for society simultaneously.