Frank also formed an eye feature that persisted for about a day.

Around that time, a ragged eye feature appeared on satellite imagery.

An eye feature also appeared on infrared satellite but was not associated with significant strengthening.

The convection near the center greatly organized, and an eye feature began to develop.

By late August 17, satellite imagery indicated that an eye feature may have been developing.

It slowly intensified, developing an eye feature on December 5.

It also developed a small eye feature, based on satellite presentation.

On September 26, an eye feature developed, and very deep convection increased around the circulation.

Subsequently the storm quickly intensified, developing an eye feature later that day.

The eye feature was no longer there the next day and the storm quickly moved out to sea.