Eye Pain
You experience chronic pain in your eyes, causing eye pain and headaches. Any action that requires concentration (e.g., maintaining a spell) requires a successful DC 10 + (IE) Constitution saving throw per round to maintain concentration. Because you’re used to managing pain, even though this doesn’t reduce the experience of it, you have a +(IE) bonus to saving throws against psychic damage.
Real-world Examples
Conjunctivitis, Blepharitis, Glaucoma, Optic Neuritis, Iritis
Assistive Options
You can rest, which helps relieve pain while resting, but as soon as you stop resting, so does the relief.
Magical Assistance
Any kind of magical healing except potions that relieves at least 1 hp can be applied directly to the eyes to reduce pain by 2 IEs for a number of hours equal to the number of hp that would’ve been healed to a maximum of 1 day.