Hi , there is nothing as such to reduce the power naturally
Next Steps
tips to maintain the power or to slow down the increase in power
1) eat all green and yellow vegetables and fruits
2)have more of fish in your meal
3) reduce your screen time (mobile,or any gadgets)
4) do pencil push up eye exercises and ORTHOPTIC exercises which will be easily available in youtube
5) further detailed examination pls visit your local ophthalmologist