Updated September 25, 2026. Fact-checked against veterinary sources; review by a licensed veterinarian is in progress. See our editorial policy.
Quick answer: Recovery depends on the cause. Mild conjunctivitis often improves within a few days of treatment. A simple corneal ulcer usually heals in about 5–7 days, while deeper or non-healing ulcers can take weeks and sometimes need procedures. Dry eye is a lifelong condition managed with daily medication. If an eye isn’t improving within a few days, or gets worse, call your vet.
Typical timelines
- Conjunctivitis: improvement in 2–5 days
- Simple corneal ulcer: often heals in about a week
- Indolent (non-healing) ulcers: common in middle-aged dogs such as Boxers. May need a procedure to help healing, then 1–3 weeks
- Deep or infected ulcers: weeks, sometimes surgery
- Dry eye: lifelong daily treatment, with improvement over weeks
- Blocked tear duct infections: often 1–3 weeks
Supporting healing
- Give eye medications on schedule. Wait a few minutes between different drops
- Use a cone to prevent rubbing
- Keep rechecks, since ulcers are re-stained to confirm healing
Signs healing isn’t on track
- More squinting, redness, or discharge
- Cloudiness spreading
- A visible pit or bulge on the eye
Call your vet promptly if you see these.
Sources
- Merck Veterinary Manual: Conjunctivitis in dogs
- Merck Veterinary Manual: Corneal ulcers in small animals
- American College of Veterinary Ophthalmologists (ACVO): Pet owner information
This article is for general education and is not a substitute for care from your own veterinarian. Learn about The Pet Vet and our editorial policy.