Which set lists the three most common ocular conditions that cause red eye in the morning?

• A. Blepharitis; Conjunctivitis; Uveitis
• B. Floppy eyelid syndrome; Exposure keratopathy; Recurrent corneal erosions
• C. Dry eye syndrome; Allergic conjunctivitis; Cataract
• D. Glaucoma; Macular degeneration; Retinal detachment

Answer: (B)

Red eye that shows up in the morning is most often linked to lid and surface issues that are most prominent when the eye has been closed for several hours. The three conditions that fit this pattern are floppy eyelid syndrome, exposure keratopathy, and recurrent corneal erosions.

Floppy eyelid syndrome occurs when the upper lid is unusually lax and can evert easily during sleep. This causes the lid to rub against the ocular surface overnight, leading to irritation, redness, and a gritty sensation that many notice upon waking. The persistent mechanical irritation explains why the redness is a morning feature rather than something that only appears during the day.

Exposure keratopathy stems from incomplete eyelid closure or poor lid function at night, which lets the cornea dry and the surface cells become damaged. The result is redness, irritation, and foreign-body sensation that are typically most noticeable in the morning and improve with daytime lubrication and blinking.

Recurrent corneal erosions happen when the corneal epithelium doesn’t adhere well to the deeper layers after sleep. Blinking in the morning shears or rubs the loosened epithelium, producing morning pain, tearing, redness, and sensitivity to light. The morning onset is a classic clue to this pattern.

Other conditions can cause red eye, but they don’t align as closely with the overnight lid/surface mechanisms that produce morning redness, whereas these three do.