Is the permanent reshaping of your cornea worth the risk of chronic dry eyes?

Health · Published 3 October 2026 Swipe more like this →

In short: LASIK promises freedom from glasses by using lasers to reshape the cornea, a procedure performed millions of times globally. While satisfaction rates are high, the surgery is not without controversy. From its origins in experimental physics to modern debates over long-term side effects, understanding the trade-offs is essential.

The LASIK procedure, or laser-assisted in situ keratomileusis, relies on the precision of excimer lasers to vaporize microscopic amounts of corneal tissue. Developed from 1950s techniques by José Barraquer and refined by IBM researchers in the 1980s, the surgery involves creating a corneal flap to access the stroma. Once the stroma is reshaped, the flap is repositioned, acting as a natural bandage that heals without stitches. This rapid, 10-to-15-minute intervention has been performed over 40 million times globally between 1991 and 2016.

Despite high reported satisfaction rates—often cited between 92 and 98 percent—the procedure is not universally successful. A significant point of contention is chronic dry eye, which affects a large portion of patients post-operatively. While symptoms often improve within a year, some patients report persistent, severe issues that impact their quality of life. Other potential complications include visual disturbances like halos, starbursts, and difficulty driving at night, which persist for a small percentage of patients even five years after the surgery.

The popularity of LASIK has fluctuated significantly, with US surgeries dropping from roughly 1.5 million in 2007 to 604,000 in 2015. This decline has been linked to the 2008 economic recession, the rise of alternative cataract surgeries, and critical media coverage. Furthermore, internal debates persist regarding the efficacy of wavefront-guided versus traditional techniques, and whether vector planning might offer superior outcomes for patients with complex astigmatism. Ultimately, the decision requires balancing the desire for visual acuity against the reality of permanent, non-reversible changes to the eye's structure.

Regulatory bodies like the FDA and the American Academy of Ophthalmology emphasize the importance of rigorous pre-operative screening to rule out contraindications such as thin corneas or pre-existing dry eye conditions. Because the surgery is elective, patients must weigh the potential for 20/20 vision against the risk of permanent side effects, ensuring they are fully informed about the long-term implications of altering their corneal anatomy.

General information, not professional advice. Spotted an error? Flag the card or see corrections and complaints.

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