Photo: Ali Pazani

Can your eyes change color?

Pupils change sizes to let more light into the eye, often in surroundings with dim lighting. This causes the eye to appear darker due to the iris being less visible. Pupils also change sizes when you're experiencing intense emotions, giving rise to the myth that people's eyes can change colors to suit their emotions.

eyecarecenter.com - Can Your Eyes Change Color? Myths & Facts - eyecarecenter

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How Eye Color is Determined

Eye color is created by a type of pigmentation called melanin. Melanin concentrates in a part of the eye called the iris, which is a circular area around your pupil that helps control how much light enters your eyes. The more melanin you have in your eyes, the darker your eyes will be. So, people with brown eyes produce more melanin than someone with blue or green eyes. The amount of melanin in your irises, and thus your eye color, is determined by your genes. There are several genes that help determine eye color, and many of them also play a role in the coloring of your hair and skin.

Genetics Play a Part in Eye Color

A couple's eye color helps to determine what eye color their children might have. It’s common to see two parents with blue eyes that have children with blue eyes. If one parent has blue eyes and the other has brown eyes, then their child's eye color is less predictable. Still, it's possible for a child's eye color to be different from what their parents have. This can happen due to other genetics in the family. For instance, a child of parents with brown eyes may have blue eyes if they have grandparents with blue eyes. If you're wondering which side of the family a newborn baby's eyes came from, you may want to wait a few months. It's completely normal for a person's eye color to change and darken over the first few months of their life. That's because melanocytes, which are cells in the body that secrete melanin, continue to secrete in the eyes for about six months after birth. For most people, eye color will not change significantly past infancy.

Minor Changes in Color are Possible

There is a possibility of minor changes in eye color as an adult. It’s common for long-term sun exposure to cause eye color to darken slightly. In fact, a small percentage of Caucasian people’s eyes lighten as they age. For the most part, your eye color will not change. Any significant changes in eye color may be a sign of a larger problem. Let's dive into reasons eye color may appear different versus the factors that may cause it to change.

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How can you tell if someone is cross eyed?

The most common signs of strabismus are: Eyes that don't look in the same direction at the same time. ... Eyes that don't move together. Squinting or closing one eye in bright sunlight. Tilting or turning the head to look at an object. Bumping into things.

stanfordhealthcare.org - Strabismus (Crossed Eyes) Symptoms - Stanford Health Care

The most common signs of strabismus are:

Eyes that don't look in the same direction at the same time. (If your child's eyes are only slightly misaligned, you may not notice.)

Eyes that don't move together.

Squinting or closing one eye in bright sunlight.

Tilting or turning the head to look at an object.

Bumping into things. (Strabismus limits depth perception.)

An older child may also complain about blurred vision, tired eyes, sensitivity to light, or double vision. Symptoms may come and go. They may get worse when your child is tired or sick. A newborn's eyes may be misaligned at first. But the eyes should become aligned by 3 to 4 months of age. In some cases, the eyes may simply seem to be misaligned because the child has a wide bridge of the nose that creates the appearance of crossed eyes. But if your child's eyes aren't aligned all of the time after age 4 months, take your child to the doctor for an eye exam.

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