Compare the two eyes before wiping
Look in even daylight. Is one eye different? Note clear tearing, stringy mucus, yellow or green material, blood, crusting, redness, cloudiness or swelling. Watch whether the dog blinks repeatedly, rubs the face, avoids light or keeps the eyelids partly closed. Photograph the eye before cleaning if that can be done without restraint.
Color describes the discharge, not the diagnosis
Clear tears can follow irritation, poor drainage or pain. Thick mucus may occur when the tear film is abnormal. Yellow or green discharge can accompany inflammation or infection, but appearance alone cannot show whether the surface is scratched, an eyelid is rubbing, a foreign object is present or pressure inside the eye has changed.
- One eye or both
- Exact start time and speed of change
- Discharge color and thickness
- Squinting, rubbing, light avoidance or visible pain
- Cloudiness, swelling, trauma or chemical exposure
- Current eye medication and previous eye disease
Clean only the surrounding fur
If the dog is comfortable, soften crust on the fur with clean lukewarm water or sterile saline and wipe away from the eye with clean gauze. Do not force the eyelids open. Avoid human redness drops, leftover antibiotics, contact lens solutions and products containing medication unless a veterinarian directs their use for this episode.
Eye pain should not wait for a routine slot
Seek prompt or same day advice for squinting, holding the eye closed, a cloudy or blue appearance, marked redness, swelling, unequal pupils, sudden vision trouble, blood, a visible object or any scratch or blow. Chemical exposure requires immediate veterinary or poison guidance on flushing while care is arranged. An eye displaced from the socket is an emergency.
Cloudiness in an older dog already has a separate canonical guide because it is a lens and vision question. This page owns material coming from the eye and uses pain, laterality and timing to guide the call.
For the appointment, bring the timeline and every eye product currently used, including nonprescription wipes. Mention whether discharge is worse after sleep, outdoors, in wind or after grooming. If facial hair touches the eye, photograph that relationship without trimming immediately before the examination. The veterinarian may assess the eye surface, tear production, eyelids, drainage and pressure depending on the presentation. Those tests answer different questions, which is why an online color chart cannot safely select drops. If an eye medication has already been prescribed, ask what to do about a missed dose rather than doubling or stopping it without instructions.