For the first days of life a kitten finds the mother by warmth, smell, and touch, because the eyes are sealed shut at birth. The lids typically begin parting at about seven days, as a slit at the inner corner that widens over a day or so, and most kittens have both eyes open by about fourteen days. One eye may open a day or two before its partner, and that small mismatch is normal, as is a blurry, blue, slightly cross-eyed look while the muscles and focus catch up.
What Normal Opening Looks Like
Keep the nest dim while eyes are opening, since new eyes are sensitive to bright light and a kitten will turn away from glare. Vision improves in stages: shadows and movement first, then faces and toys at close range, then steadier depth judgment as play starts. The ears unfold in the same broad period, so a kitten who startles at a soft sound and blinks toward it is developing on two tracks at once. Never try to part sealed lids yourself, even if one eye lags, because forcing them can damage the surface and introduce infection. Clean bedding, brief warm handling, and a mother left in peace to wash faces do more good than any checking routine at this age.
Signs That Need a Prompt Vet Call
Healthy opened eyes are clean and clear, with no crust sealing them at waking and no discharge pooling in the corners. Discharge is not normal, so treat stickiness that glues an eye shut, yellow or green discharge, swelling of the lids, or an eye bulging or sunken compared with its pair as a prompt vet call. Infections in tiny kittens move fast, and an eye left sticky for days can be damaged behind the lid where you cannot see. Call the vet the same day, keep the eye gently free of crust with a soft cloth dampened in warm water if the vet advises it, and do not use leftover drops or another animal's medicine. Note which eye is affected and when the stickiness started for the vet.
Supporting the First Two Weeks
Light and warmth shape those first days more than handling does. The nest should sit away from direct sun and bright lamps, warm enough that kittens sleep in a loose pile rather than a tight, constantly shifting heap, and quiet enough that the mother stays settled with them. Check eyes when you weigh and handle, in the same order each time, so a change in one kitten stands out against a calm routine. A healthy litter at this age mostly sleeps and feeds, waking to crawl toward warmth and the mother, and eyes that open into that quiet world should meet soft light first. If you foster orphans, your vet can show you how to check hydration and feeding alongside the eye checks, because in a hand-reared litter every small system needs a human watching it until the kittens can regulate themselves.
Weigh each kitten daily on a kitchen scale, handle them briefly while they are warm and fed, and watch that every kitten in the litter reaches the mother and gains. A kitten whose eyes open but who fades, feeds poorly, or feels cool needs help beyond eyes alone. Littermates should open within a similar window, so one kitten lagging far behind the rest deserves a mention when you call. Recording a line a day on opening, clarity, and weight keeps the picture honest, and KinsLe built Care Teams around timestamped checks so whoever looks in next can see exactly which kitten was checked and when.