You may have heard glaucoma called "the sneak thief of sight." That's because it often has no symptoms until it has progressed to advanced stages, where vision loss may be irreversible.
As the leading cause of irreversible blindness worldwide, glaucoma remains a major public health concern, particularly as populations age and access to care varies globally. This January, organizations like the National Eye Institute (NEI) and Prevent Blindness are emphasizing the 2025 theme "See the Future Clearly," urging early detection through dilated eye exams to protect vision.
Today, more than 3 million Americans are affected, with about 2.7 million of them aged 40 and older'though half remain undiagnosed. Globally, around 80 million people live with the condition, and projections indicate it will impact 111.8 million by 2040, disproportionately in Asia and Africa due to aging demographics and limited screening. In the U.S., glaucoma causes about 120,000 cases of blindness, with rates 6'8 times higher among African Americans than Caucasians.
The cornerstone of glaucoma management hasn't changed: regular comprehensive eye exams with dilation. The American Academy of Ophthalmology (AAO) now recommends baseline screening at age 40 for all adults, or earlier (starting at 20) for high-risk groups, with follow-ups every 1'2 years based on individual factors. Most optometrists and ophthalmologists incorporate eye pressure measurement, optic nerve imaging, and visual field testing as standard. If any red flags appear, immediate referral to an ophthalmologist is key. Early intervention can halt or slow progression in 90 percent of cases, preserving quality of life for driving, reading, and independence.
While the most common forms, primary open-angle glaucoma, still primarily affect those over 40, glaucoma strikes all ages, including about 1 in 10,000 newborns in the U.S. Pediatric screening is vital during routine vision checks, especially for eyeglass fittings. High-risk groups include:
Severe Nearsightedness (Myopia): High myopia increases optic nerve stress.
Diabetes: Poorly controlled blood sugar.
Elevated eye pressure
Other Emerging Factors: Low blood pressure, metabolic syndrome, CKD, corticosteroid use.