Cataracts can develop at any age, including at birth. While most people associate them with aging, some babies are born with cloudy lenses, and younger adults in their 20s, 30s, and 40s develop them more often than you might expect. About 12% of cataract surgeries in one large study were performed on people under 55.
Cataracts Present at Birth
The earliest possible onset is day one. Congenital cataracts form during fetal development, meaning a baby can be born with a cloudy lens in one or both eyes. These are typically detected through a red reflex test, a simple screening where a light is shined into the newborn’s eye to check for obstructions. A normal eye produces a red-orange glow (like “red eye” in photos), while a cataract blocks that reflection and appears white or dull.
Congenital cataracts sometimes occur on their own, but they can also be part of broader genetic conditions. Several inherited syndromes include cataracts as a feature, often alongside other developmental differences. Some cases are linked to infections the mother experienced during pregnancy, such as rubella. When cataracts are present at birth or develop in the first few months, early treatment is critical because the visual system is still forming. A cloudy lens during this window can lead to permanent vision loss in that eye (amblyopia) if it isn’t addressed quickly.
Cataracts in Your 20s, 30s, and 40s
Cataracts in younger adults are called presenile cataracts, and they have a different profile than the age-related kind. A study from a major medical center in Taiwan found that among people aged 30 to 54 who needed cataract surgery, severe nearsightedness was the leading cause, accounting for 47% of cases. Diabetes was next at about 27%, followed by a history of prior eye surgery (26%) and high blood pressure (22%).
The connection between severe nearsightedness and early cataracts isn’t fully understood, but the leading theory involves physical stress on the lens. In highly nearsighted eyes, the eyeball is elongated, which causes the gel-like fluid inside to break down more rapidly. This breakdown may create repeated micro-injuries to the lens over time, eventually causing it to cloud earlier than it otherwise would.
Younger adults with cataracts tend to develop a specific type called posterior subcapsular cataracts, which form at the back surface of the lens. These progress faster than the typical age-related kind and are particularly noticeable when reading or looking at bright lights. People with uncontrolled diabetes can develop a distinctive “snowflake” cataract, where excess blood sugar gets converted into a substance that accumulates in the lens, creating a grayish-white starburst pattern.
Steroid Medications and Cataract Risk
Long-term corticosteroid use is one of the most well-documented causes of early cataracts. Over 50% of patients taking oral corticosteroids for more than 60 days develop some type of eye complication, with cataracts occurring in about 36% of them. The risk depends heavily on how the medication is taken: pills carry the highest risk, followed by inhaled forms, with localized injections around the eye posing the least danger (only about 1.7% incidence).
The numbers vary significantly depending on the condition being treated. Children with kidney disease who take oral corticosteroids for several years develop cataracts at a rate of about 18%. Patients being treated for blood cancers with high-dose steroids face a 36% cataract rate within just six treatment cycles. Even inhaled corticosteroids used for lung conditions carry meaningful risk at higher doses: people using the equivalent of more than 500 micrograms per day for over a year had a cataract rate close to 40%, while those on low doses showed no significant increase.
If you take corticosteroids regularly for any chronic condition, the cumulative dose and duration matter more than the daily amount. This is worth discussing with your prescriber, especially if you’ve been on them for months or years.
Eye Injuries Can Cause Immediate Cataracts
A traumatic cataract can form within minutes. When a sharp object like glass or metal penetrates the eye and reaches the lens, the lens can cloud almost instantly as fluid rushes into the damaged area. Blunt force trauma, like being hit by a ball or fist, can also cause cataracts, though these sometimes take months or even years to become noticeable. The type and speed of cataract formation depend entirely on whether and how badly the lens capsule (its outer membrane) was torn. A visible clouding within hours of an injury usually means the capsule was breached.
Sun Exposure in Early Adulthood Matters
UV radiation contributes to cataract formation, and when you get that exposure appears to matter. A study of a Mediterranean population found that people with high levels of outdoor sun exposure between ages 25 and 45 had roughly triple the risk of developing nuclear cataracts (the most common age-related type) later in life, compared to those with lower exposure during those same years. The lens appears to be more vulnerable to UV damage during younger decades, possibly because a natural internal barrier that develops in middle age hasn’t yet formed. Wearing sunglasses that block UV rays during your working years isn’t just about comfort; it has a measurable effect on your lens health decades later.
Symptoms That Appear Earlier Than Expected
Age-related cataracts usually announce themselves gradually in the 60s or 70s with a slow overall blurriness. Early-onset cataracts can feel different. Because the posterior subcapsular type is more common in younger people, the first symptom is often difficulty reading or glare from oncoming headlights at night, rather than a general haze. You might also notice double vision in one eye, colors appearing washed out or yellowish, or needing significantly more light to read comfortably.
In infants and very young children, cataracts are harder to spot because the child can’t describe what they see. Warning signs include a white or grayish discoloration visible in the pupil, eyes that don’t seem to track together, or poor eye contact with caregivers after about eight weeks of age. Pediatric vision screening guidelines recommend red reflex testing at birth and at every well-child visit, along with more detailed instrument-based screening starting around six months. Children with developmental delays deserve particular attention, since their eye conditions are often identified later, reducing the window for effective treatment.
Who Should Be Watching for Early Cataracts
You’re at higher risk for developing cataracts before age 55 if you have severe nearsightedness, diabetes (especially if blood sugar is poorly controlled), a history of eye surgery or eye injury, or if you use corticosteroids regularly. A family history of early cataracts also raises your risk, since many of the genes involved in lens clarity are well established. Routine eye exams every one to two years can catch lens changes long before they affect your daily life, giving you and your eye care provider time to monitor progression and plan ahead.