Acid attack is a life sentence for the victims. If the victims are blinded then their entire family suffer with no income (assuming main earner), not to mention the lifetime mental torture.
The current law does not work for certain segment of the society using acid as weapon. The law simply does not deter the attacks.
For me the severity of the injury should reflected in the punishment.
If the victims are blinded then attacker(s) should incur life sentence. If possible part of the cost (imprisonment) to be funded by the perpetrators’ direct family regardless.