The shape of the eye is important
Whether straight, in-turned or out-turned, the eye determines the alignment of the hook with the bait.
1. In-turned eye: increases the aggressiveness of the rig because it lets you create a more extreme angle compared to the leader.
2. Straight eye: lets you perfectly align the hook with the line and bait
3. Out-turned eye: lets you reduce the angle of the leader. Rigid materials such as fluorocarbon are ideal for these hooks.