Hi all! I'm getting prism mixed up in my head. I know the basics - light is displaced toward the base of the prism and the eye always turns in the direction of the apex. Where I'm having trouble is in the practical application. For instance, a textbook I'm reading states that if one eye turns upward, a prism may be placed with its base down before that eye. It would allow the person to see objects easier but it wouldn't "force" the eye to a normal position. Wouldn't you want to put the prism base up to get the eye to not turn upward?