Stories about: Snellen Eye Chart

Are your child's eyes keeping her from A's and B's?

Many vision tests can be accurate, but often the results depend on more than eyesight

From artificial organs to robotic surgery, modern medical science has vastly improved in the past few decades. Why then, despite all these technological advances, are most pediatricians and public schools still using vision tests developed 148 years ago? In a world where surgeons can preserve the vision of patients with ocular tumors, relying on a vision test where kids simply cover an eye and read a string of letters seems a little archaic. But despite its simplicity, the commonly used Snellen Eye Chart is very accurate— assuming the test subject is old enough to understand what’s being asked of him.

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