Ptosis, the drooping of one or both upper eyelids, is one of the most common eyelid conditions. Its prevalence depends heavily on age and cause: roughly 1 in 842 children are born with it, while studies of adults over 60 consistently find rates between 25% and 27%, making it far more common in older populations than most people realize.
Prevalence by Age Group
Age is the single biggest factor in how likely someone is to have ptosis. In children, the condition is relatively uncommon. A study published in Ophthalmology found that childhood ptosis was diagnosed in about 7.9 per 100,000 patients under 19. Most of these cases (roughly 90%) were present from birth rather than developing later in childhood.
The picture changes dramatically in older adults. A 2025 cross-sectional survey of elderly individuals in China found that 25% had ptosis, making it the most common eyelid disorder in the study population of over 3,000 people. A separate 2024 study of elderly Asian adults at a health screening center put the number at 27.16%. These aren’t outliers. Among patients seeking cosmetic eyelid surgery, 13.7% of over 2,500 candidates had undiagnosed ptosis, and they tended to be significantly older than those without it. In a group of patients seeking facial rejuvenation procedures, 57.6% had measurable ptosis.
The takeaway is clear: if you’re over 60 and notice your eyelids sitting lower than they used to, you’re in very common company. Roughly one in four older adults has some degree of drooping, though many cases are mild enough that people attribute them to normal aging rather than a specific condition.
Congenital Ptosis in Children
About 1 in 842 births results in simple congenital ptosis, where a child is born with a droopy eyelid due to underdevelopment of the muscle that lifts it. Of all childhood ptosis cases identified in one major study, 75% fell into this category. The remaining cases involved ptosis linked to other conditions present at birth, such as differences in how the eye muscles or nerves developed.
Congenital ptosis matters beyond appearance. In young children, a drooping lid can block the visual axis during critical years of visual development, potentially leading to amblyopia (sometimes called “lazy eye”) if the brain learns to ignore input from the affected eye. The severity varies widely. Some children have barely noticeable asymmetry, while others have lids that cover most of the pupil.
Age-Related Ptosis in Adults
The most common form of ptosis overall is aponeurotic ptosis, where the tendon connecting the eyelid muscle to the eyelid itself stretches or thins over decades of use. Every blink puts a small amount of wear on this tissue. Over a lifetime of roughly 15,000 blinks per day, the cumulative effect can loosen the connection enough that the lid gradually drops.
This type of ptosis tends to develop slowly, often over years, which is one reason it frequently goes undetected. People adapt by raising their eyebrows, tilting their head back, or simply accepting a gradually narrowing field of vision as normal aging. Studies of patients with excess eyelid skin (dermatochalasis) found that 27.7% also had underlying ptosis, with about two-thirds of those cases classified as mild. The overlap between skin changes and muscle changes around the eyes means the two conditions often coexist and can be hard to tell apart without a formal measurement.
Ptosis From Neurological Conditions
Several neurological conditions cause ptosis as a prominent symptom, and for some of them, a drooping eyelid is the first sign that something is wrong.
Myasthenia gravis is the most well-known example. Ptosis and double vision are the initial complaints in 75% of people with this autoimmune condition, and at least 90% develop eyelid drooping at some point during the course of the disease. Myasthenia-related ptosis has a distinctive pattern: it tends to worsen throughout the day as the muscles fatigue and may shift between eyes. If your ptosis is noticeably worse in the evening or after sustained reading, that pattern is worth mentioning to a doctor.
Horner syndrome, caused by disruption of a nerve pathway running from the brain to the eye, produces a characteristic mild ptosis along with a smaller pupil on the affected side. Third nerve palsy, which disrupts the main nerve controlling eyelid elevation, typically causes more severe drooping and is often accompanied by difficulty moving the eye. These neurological causes are far less common than age-related ptosis but are important to identify because they can signal underlying conditions that need treatment.
Ptosis After Eye Surgery
Developing a droopy eyelid after eye surgery is surprisingly common, particularly following cataract removal and glaucoma procedures. Studies report post-cataract surgery ptosis in 4% to 21% of patients, a wide range that depends on surgical technique and how ptosis is measured. One study found that the type of instrument used to hold the eye open during surgery made a significant difference: 44.4% of patients in the group where a speculum was used developed ptosis, compared to 23.3% in the group where one was not.
After glaucoma surgery (trabeculectomy), ptosis rates range from 8% to 19% in follow-up periods spanning one month to several years. The good news is that much of this post-surgical ptosis is temporary, resolving on its own as swelling decreases and tissues heal. Persistent cases, however, may require a separate procedure to correct. If you’re planning eye surgery and already have borderline eyelid positioning, it’s worth discussing this possibility beforehand so your surgeon can document your baseline measurements.
Mild vs. Severe: What the Numbers Mean
Not all ptosis requires treatment. Across multiple studies, the majority of cases identified in screening populations are mild, meaning the lid droops 2 millimeters or less beyond its normal position. In the study of patients with excess eyelid skin, 65.2% of those with ptosis had mild cases, 34.8% had moderate cases, and none had severe ptosis. Similarly, among cosmetic surgery candidates with undiagnosed ptosis, 85.5% had only mild drooping.
Mild ptosis is primarily a cosmetic concern for most adults. Moderate to severe ptosis is more likely to interfere with vision, particularly the upper visual field, which can affect activities like driving and reading. The threshold for treatment is generally based on whether the drooping blocks your line of sight or causes significant discomfort from compensatory behaviors like constant brow-raising, which can lead to forehead tension and headaches.