We use GEHA under FEHB, has eye exams and minimal dental.
We use Zenni Optical for our Glasses. Progressive Bifocals about $38 including shipping. Transition Progressive Bifocals about $109 including shipping.
Have purchased about 6 pairs over the last year. They are so reasonable, order backup, prescription sunglasses, etc. We have been 100% satisfied. Just got tired of paying $300++ for each pair of glasses.
Dental, we go to Acuna by Del Rio, Geha even reimbursed covered costs for our Mexican Dentist. She is great! and reasonable.
carried FEHB, BCBS for years, but coverage, deductibles etc., continued to erode. We liked BC, but GEHA has been a satisfactory replacement at less cost overall for us.
It may become a moot issue in the future, who knows!
Good Luck