13th national eye-care day

An ophthalmologist demonstrates with a model of an eye as students listen in a class in Nantonglu Primary School in Yantai City, east China's Shandong Province, June 4, 2008. The 13th national eye-care day falls on June 6 with the theme of "a pair of bright eyes to greet the Olympic Games." (Xinhua Photo)

Pupils do eye exercises at Cuifenglu Primary School in Huaibei City, east China's Anhui Province, June 4, 2008. The 13th national eye-care day falls on June 6 with the theme of "a pair of bright eyes to greet the Olympic Games."(Xinhua Photo)

A pupil makes a point during a sight test at Cuifenglu Primary School in Huaibei City, east China's Anhui Province, June 4, 2008. The 13th national eye-care day falls on June 6 with the theme of "a pair of bright eyes to greet the Olympic Games." (Xinhua Photo)

An ophthalmologist explains the conformation of an eye as students listen in a class at Guangmingjie Primary School to mark the coming 13th national eye-care day which falls on June 6, in Jinan, capital of east China's Shandong Province, June 4, 2008. This year's theme for the national eye-care day is "a pair of bright eyes to greet the Olympic Games."(Xinhua Photo)