When Do Kittens Open Their Eyes? A Day-by-Day Timeline
Kittens open their eyes for the first time around day 7 to day 10. Most are fully open by day 14. The eyes do not pop open all at once. A thin slit forms first. It widens slowly over several days. Kittens are born with their eyelids sealed shut. This protects the eye while it finishes growing. Because of this, you should never try to open a kitten's eyes early. Doing so can hurt the eye. The best thing to do is wait and watch. Below is what happens day by day, from birth through six weeks old. You'll also find the warning signs that mean a kitten needs a vet, not just more time.
In this article
- Day 0 to 2: Born With Their Eyes Sealed Shut
- Day 3 to 5: Ears Unfold Before Eyes Do
- Day 6 to 8: The First Slit of Light
- Day 9 to 14: Both Eyes Open, But Vision Is Still Blurry
- Weeks 2 to 3: Every Kitten Has Blue Eyes
- Weeks 3 to 6: Depth Perception and Real Play Begin
- Weeks 6 to 8: Adult Vision Is Almost There
- When to Call a Vet: Signs Something Is Wrong
- Kitten Eye Development at a Glance
- Frequently asked questions
Day 0 to 2: Born With Their Eyes Sealed Shut
Newborn kittens are blind and deaf. Their eyelids are fused shut. Their ear canals are closed too. A newborn kitten weighs just 3 to 5 ounces. That is small enough to fit in your palm. At this age, a kitten cannot keep itself warm. It cannot use the bathroom on its own either. Kittens this young need their mother, or a foster caregiver, for everything. They sleep about 90 percent of the time. The rest is spent eating.
Day 3 to 5: Ears Unfold Before Eyes Do
Ears grow faster than eyes. Around day 3, a kitten's ears start to unfold. By about day 7, the ears stand up on their own. The eyes stay sealed during this time. Under the closed lids, the eye is still forming. Parts like the cornea, lens, and retina are not ready yet. This is why vets warn against opening a kitten's eyes early. The eye simply is not fully formed.
Day 6 to 8: The First Slit of Light
Most kittens show the first thin eye slit around day 6 to day 8. This is the true start of eye opening. It happens slowly, not all at once. It is normal for one eye to open before the other. Sometimes there is a gap of a day or two. If a kitten's eyes have not opened at all by day 8 or 9, do not panic yet. The normal range runs from about day 2 to day 16. Just keep watching for the warning signs later in this guide.
Day 9 to 14: Both Eyes Open, But Vision Is Still Blurry
By day 10 to 14, most kittens have both eyes fully open. That does not mean they can see well yet. The retina and other parts inside the eye are still growing. A kitten this age can mostly sense light and motion. Sharp shapes are still out of reach. Vets say a kitten's pupils cannot shrink for about two to three days after the eyes open. That means bright light is uncomfortable, and can even be risky, during this short window. Keep newly opened eyes away from direct sun or harsh lamps.
Weeks 2 to 3: Every Kitten Has Blue Eyes
Every kitten is born with blue eyes. This is true no matter what color their eyes will be as an adult. The cells that make eye color are called melanocytes. They have not switched on yet. Around two weeks old, a kitten's vision starts to improve. By three weeks, many kittens begin using both eyes together to focus. This is called binocular vision, and it just means both eyes team up on one target. Their sight is still fuzzy. But the world is starting to come into focus.
Weeks 3 to 6: Depth Perception and Real Play Begin
Depth perception is the skill of judging how far away something is. It starts to develop around four weeks old. By six weeks, a kitten uses sight, along with smell, to find food. It also uses sight to avoid bumping into things. This is also when the wobbly newborn turns into a small daredevil. Around five to six weeks, kittens start to stalk, pounce, and wrestle with their littermates. All of this play depends on eyes that can finally track movement well.
Weeks 6 to 8: Adult Vision Is Almost There
Full adult-level vision does not arrive until a kitten is 8 weeks old, or a bit older. Around this same time, the kitten's true adult eye color starts to show through the fading baby blue. The full color change is not usually done until somewhere between 6 and 12 weeks. By 8 weeks, a healthy kitten weighs close to 2 pounds. That is also old enough to be spayed or neutered.
When to Call a Vet: Signs Something Is Wrong
Most kittens follow this timeline with no trouble at all. But watch for a closed eye that looks swollen, bulging, or is leaking fluid before it opens. This can be a sign of an infection called neonatal ophthalmia. It happens when bacteria get trapped under the still-sealed lids. A vet needs to gently open the lids and treat the infection. This should happen before it causes lasting damage. Never try to open a swollen eye yourself.
Other signs mean you should see a vet the same day. These include one eye staying shut for several days after the other has opened, thick or colored discharge, a cloudy or hazy look to the eye, or a kitten pawing hard at its own face. If you are fostering during kitten season, when shelters see the most orphaned litters, watch eye development closely. Bottle-fed kittens have no mother cat to groom away early discharge, so small problems are easy to miss.
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Kitten Eye Development at a Glance
| Age | What the eyes look like | What the kitten can see |
|---|---|---|
| Birth to day 2 | Sealed shut | Nothing |
| Day 3 to 5 | Still sealed, ears unfolding | Nothing |
| Day 6 to 8 | First thin slit opens | Light and motion only |
| Day 9 to 14 | Fully open, blue | Blurry, cannot focus yet |
| Week 3 | Blue, more alert | Starting to use both eyes together |
| Weeks 4 to 6 | Still blue | Depth perception, tracking play |
| Weeks 6 to 12 | Adult color coming in | Sharpening steadily |
| 8 weeks and older | Near-adult color | Adult-level vision |
Frequently asked questions
Can I gently open a kitten's eyes if they have not opened by day 14?
No. Never pry a kitten's eyes open, even gently. The eye is still forming under the lid. Forcing it open can scratch the cornea or cause an infection. If a kitten's eyes have not opened at all by day 14 to 16, call a vet. Also call if a closed eye looks swollen or puffy.
Why do newborn kittens have blue eyes?
All kittens are born with blue eyes. This happens because melanocytes, the cells that make eye color, have not started working yet. A kitten's true adult eye color comes in slowly. It is usually set somewhere between 6 and 12 weeks old.
Is it normal for one eye to open before the other?
Yes. It is common for one eye to open a day or two before the other. This is normal, not a sign of a problem. Just make sure both eyes eventually open, and that neither one looks swollen or leaks fluid.
What should I do if I find newborn kittens outdoors with their eyes still closed?
Watch from a distance first. A mother cat often leaves her kittens alone for hours while she hunts or eats. Healthy kittens with a mother nearby are usually better off left in place. Only step in if the kittens are in danger, hurt, or clearly abandoned. If you end up caring for a bottle-fed litter, especially during kitten season, watch each kitten's eyes closely. There is no mother cat to catch early problems for you.
Do bottle-fed or orphaned kittens open their eyes on a different schedule?
Generally, no. Bottle-fed kittens tend to follow close to the same day 7 to day 14 timeline. What differs is the care they need. A caregiver has to keep them warm. They need feeding every two to three hours, day and night. And someone has to watch closely for the warning signs above, since there is no mother cat to groom away early trouble.
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