Many people notice that their eyes appear a little different as they age, and it’s not uncommon to wonder why your eyes seem to be getting lighter or darker. 

But can eye colour really change with age, or does it just seem that way? Subtle shifts are quite common, and most are harmless. Understanding why they happen helps you know what’s normal and when to book an eye exam.

What Determines Eye Colour?

The colour of your eyes is determined by the amount of melanin within the iris. For instance, blue eyes have less melanin than green eyes, while green eyes have less melanin than brown eyes. Genetics influence the development of pigment, which is why blue, green, hazel, and brown eyes often run in families. 

Most babies are born with blue or grey eyes that darken in early childhood as melanin production increases. By adulthood, eye colour usually stabilizes. However, lighting, makeup, and even your clothing can change how your eye colour appears. Pupil size also affects perception: a dilated pupil can make the iris look darker.

Why Eye Colour May Seem to Change With Age

Natural Aging

Melanin production can gradually change as you age. This means that eyes that once appeared dark brown may soften to a lighter tone, while eyes that were already lighter may become slightly darker. Note that age-related changes in eye colour are usually minimal and develop very slowly over the years.

Health or Medication Factors

Certain eye conditions can alter pigment distribution, including pigmentary glaucoma, Horner’s syndrome, and Fuchs’ heterochromic iridocyclitis. Some glaucoma medications, such as prostaglandin analogues, can also cause the iris to darken. If you notice any uneven or sudden change in your eye colour, visit an optometrist as soon as possible for a comprehensive exam.

External Factors

Lighting conditions, flash photography, clothing, and makeup can cause eyes to appear to shift in colour. Coloured contact lenses are another safe way to change appearance, as long as they are professionally fitted and prescribed.

When to See Your Optometrist

If one eye changes colour more than the other, or if you notice new dark spots, light sensitivity, or blurred vision, book an exam at Laurier Optical as soon as possible. These symptoms can indicate eye health concerns, and detecting them early can help protect your vision and ensure efficient treatment.

Embrace Your Eye Colour

No matter the colour, your eyes are unique. Keep them healthy and protected by wearing UV-blocking sunglasses, eating nutrient-rich foods like leafy greens and salmon, and scheduling regular eye exams. If you’d like to explore a different look, do it safely with the guidance of a professional. Your natural eye colour, whatever its shade, deserves care and attention. Ensure your vision is at its best with Laurier Optical. Contact us to schedule an appointment.