Acharya Lakshmana Sharma, father of nature cure in India , in his book, the Practical Nature Cure lists different methods of healing blindness using, mainly, the sunlight. He explains hydrotherapy, gazing the sun through green leaf, mud pack,eye exercises and other methods.

I lived in an asram for some months and I was fortunate to have practical experiences of Sharma's nature cure therapies.Sun light is very important.