Noticing that one of your child’s eyes seems to drift inward or outward in photos is unsettling, but whether it’s strabismus and how long it’s reasonable to watch depends heavily on your child’s age and exactly how the eye movement shows up.
Why It Happens
Strabismus happens when the six muscles that control each eye’s movement don’t work together in balance, so the two eyes can’t both point at the same spot at the same time. Contributing factors can include uneven strength among the eye muscles, significant farsightedness that makes a child strain to focus at close range, and a brain visual system that’s still maturing and hasn’t fully learned to merge input from both eyes. Children with significant farsightedness are particularly prone to a type called accommodative esotropia, where the eyes turn inward as the child works to focus on nearby objects.
How It Looks at Different Ages and Stages
Before about four months of age, a baby’s focusing system is still developing, so eye movements that look like strabismus, especially if they’re intermittent or measure less than about 40 prism diopters, sometimes resolve on their own. However, strabismus that persists past four months, or a new inward turn that appears later, is generally considered something to have evaluated promptly. Between 12 and 36 months, a child should be referred to a pediatric eye doctor if the eyes appear consistently misaligned, if there’s chronic tearing or discharge, or if the child fails a vision screening; by age 5 at the latest, every child is generally recommended to have visual acuity and eye alignment screened.
Home Care
At home, it can help to compare where your child’s pupils sit while looking straight ahead versus at near and far objects. Taking a photo with a flash and checking whether the light reflection lands in the same spot on both eyes is a commonly used at-home check. It’s also worth noting whether your child resists having one eye covered, squints frequently, or tilts their head to one side while watching TV or reading, since these habits are useful details to share with an eye doctor. These observations are only a rough screening tool, though, and can’t substitute for a full eye exam.
Common Parent Misconceptions
Some parents assume a young baby’s eye turn will simply resolve with time and put off having it checked, but the ability to align and fuse images from both eyes tends to finish developing around age 8, so strabismus left unaddressed before then can lead to lasting vision problems such as amblyopia. On the other hand, some mistake a newborn’s flat nasal bridge, which can create the illusion of crossed eyes (pseudostrabismus), for true strabismus and worry unnecessarily. Another common misunderstanding is thinking treatment timing depends mainly on age; in practice, the type and severity of the strabismus and the condition of the eyes themselves usually matter more than age alone.
Signs That Need Medical Care
If one or both eyes continue to turn in or out past four months of age, or if a new eye turn suddenly appears, it’s worth arranging a pediatric eye exam. If frequent squinting or head-tilting continues, or one eye seems to see less clearly than the other, getting an accurate diagnosis and starting treatment before age 10 at the latest matters for long-term vision development. Seek emergency care right away if a misaligned eye appears suddenly after a head injury or is accompanied by sudden blurred or double vision. This information isn’t a diagnostic tool and doesn’t replace advice from a medical professional.