Hi, i would like to know if the things my mother did to me was abuse or just normal discipline like my mom said it was.

I have been thinking about this lately, my first memory of my mother is of her screaming at me as a toddler in my highchair,then hitting me hard enough to knock me and my highchair to the floor,that would happen over and over again untill i grew out of my highchair.my mothers favorite form of discipline was to hit me in the head, some times to the point that it drove me to my knees,or into unconsciousness. by the time i was three years old my mother had disciplined me so thoroughly,that i was left permanetly blind in my right eye.between the age of 3 to 5,my mom worked the graveyard shfit,when she came home, just be fore she would lye down in bed with a bottle of booze,she would tie my arms and legs to a chair,then she would lye down and drink till she passed out.my mom got home from work at 7am,and no one else came home untill 6pm,which ment i spent hours and hours in the chair.some times when she got realy mad she would drag me across the floor by my hair,toss me in to a corner and hit me over and over again,i did not allways lose consciousnes,some times some thing more scary would happen, i would start to go away in my head,and when i looked at my mom she would look like she was very very far away at the end of a long tunnel,then i couldnt hear her,and i felt like i lost myself,that feeling of being lost scared the hell out of me!!!,my mom has allways said she did not abuse me,just disciplined me,but to me it felt like abuse,i would like to know what some one else thinks,so please tell me what you think,was it, or was not abuse??? was what she did normal??? like she said??? :(