Is there any way to have 100% eye sight if one's eyesight becmz weak upto -5.00? :(

I recall my grandmother giving sumone this recipe:

1/2 cup saunf
1/2 cup ground almonds
12 pieces of "misri"

U're supposed to grind it to powder and have it first thing in the morning.

Also, splashing u're eyes with chilled and steeped tea!