<http://schema.org/description>
"Cataracts are the main cause of visual impairment worldwide and account for more than 50 per cent of blindness in developing countries. Diagnosis of the condition generally involves a labor-intensive method of ophthalmic examination and grading by comparing the individual's lens against a set of standard reference photographs (see image)."^^<http://www.w3.org/2001/XMLSchema#string>
<http://medicalxpress.com/news/2014-05-software-grade-cataracts.html>