Age related macular degeneration (AMD) affects an enormous number of older adults. Around one third of people over 80 have AMD, and about 20 million Americans age 40 and older are living with the condition.

Most cases are the dry form of AMD. It usually advances gradually, but over time it can damage central vision, making it harder to see faces, read, drive, or focus on objects straight ahead. Despite how common dry AMD is, doctors still have limited options for stopping it early.

A study from Aalto University points to a different strategy. Instead of trying to replace damaged cells after vision loss has advanced, researchers are exploring whether they can help vulnerable eye cells defend and repair themselves before the disease causes severe damage.

The approach uses carefully controlled heat delivered with near infrared light.…