Figure 4. Cystine crystal quantification measured as the percentage (%) of crystals per stromal volume in different age groups. We observed a progressive increase in the crystal content in 3, 4, and 7 month old corneas that declined in the 10th and 12th month of age corneas (mo=month old; p<0.001 in 2 month versus 7 month, 2 month versus 10 month, 2 month versus 12 month, 2 month versus 4 month, 3 month versus 7 month, 3 month versus 10 month, 3 month versus 12 month, 3 month versus 4 month, 4 month versus 7 month, 4 month versus 10 month, 12 month versus 7 month, 10 month versus 7 month).