it's the same here at matthew a. henson elementary in baltimore. reading those little letters from a distance is no problem for some. >> d, c, z, o, d, t, p. >> brangham: but for others... >> read that line again for me? is that all you can see? >> brangham: for kids with poor vision, their parents now have to start a long and expensive process: eye doctors, opticians, buying glasses. >> we live in a community where unfortunately so many of our children live below the poverty line where there are many barriers to care including transportation and ability to pay. >> brangham: doctor leana wen is the health commissioner at the baltimore city department of health. >> even parents finding out. the process of getting those test results relayed to parents. or, insurance and reimbursement. all these were barriers to care. >> brangham: dr. wen helped usher in a new program called" vision for baltimore." it provides eye exams, and two pairs of glasses to every student who needs them, right in their own school, totally free of charge. >> about 25% of our scho