Seeing through cone-shaped cornea

The researchers describe the custom design techniques and results of visual acuity tests in a paper published in Optics Letters.
Keratoconic eyes are rare but disabling. From the side, the eyes look cone-shaped. The apex shift from visual axis in the cornea causes people with the condition to see halos and double and triple images. About 1 in 2,000 people suffer from the disease, usually in both eyes.
'The condition shows up in a relatively small population, but it causes huge optical problems,' said Geunyoung Yoon, assistant professor in the Departments of Ophthalmology and Biomedical Engineering, the Center for Visual Science, and the
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