Is there a problem with flying and retinal detachments?

Possibly: Some retinal tears and detachments are treated with an intraocular gas bubble (sodium hexafluoride) to push the retina back on. If you travel to high altitudes the gas bubble can expand and cause high eye pressure (glaucoma). It is generally advised not to fly until the gas bubble resolves (few weeks to month).

Yes if gas bubbles: Avoid flying 4-6 wks, depending on gas bubble type and how long to be reabsorbed after retinal detachment surgery. A detachment can increase in size until treated so long as gravity and eye movement forces pushes more fluid under the retina.