Currently, any gained Dragon Eyes gained from using Mirage Dive under Blood of the Dragon will be lost if the Blood of the Dragon effect wears off. This means if you have 3 eyes but Blood of the Dragon duration falls to 0, you lose the gathered eyes. To wit, almost every job has 1 unlimited duration job resource that never expires (Aetherflow, Kenki, Ninki, Ammunition, Blood Gauge, Oath Gauge, Chakras, Lillies, Managauge, Beast Gauge, etc). Both of Dragoon's job resources, Blood/Life of the Dragon are time-dependent and the eyes are tied to that. By allowing Dragoons to maintain their gathered eyes, like how a MNK never loses Chakras, it would be a HUGE quality of life boon, especially during phases of fights where bosses are untargetable.