Results of PCR using IS6110 primers on vitreous aspirates of Eales' cases. Lanes: 1, case 1 (positive); 2, case 2 (negative); 3, case 3 (negative); 4, case 4 (positive); 5, case 5 (positive); 6, positive control (H37Rv); 7, negative control (reagents); 8, molecular weight marker (Phi x 174 Hinf 1 digest).