Eat fresh and hot Jalebi (sweetmeats) for three months daily between Assar and Maghreb prayer. In sha Allah weakness of brain and eyesight will be over.
Take some mistletoe, dry and grind well and strain. Eat one pinch daily in the morning and evening with plain water. In sha Allah weakness of eyesight will recover.
Black grams (roasted) fennel, almonds and rock candy, mix all these things and eat one fistful daily. It will improve the eyesight and give a good sleep.