Looks to be ich. Have you addressed the eye issue yet?
Fish will have to be removed from tank and treated with coppersafe at treatment level 2.25 for a full 30 days
(do not interrupt this 30 day period) monitored by a reliable Copper Test kit such as Hanna Brand- No API brand. Also monitor Ammonia levels while in quarantine with a reliable test kit and add aeration during treatment using an air stone.
The display tank will have to be kept fishless (FALLOW) for 6-8 weeks to assure the existing parasites go through their life cycle without a host fish and die off and with occupants exposed, they too should go into quarantine
A quarantine tank can be as simple as a tank from a second hand store, a rubbermaid type tub or a starter kit from Walmart which most of the needed essentials.