Effect of epithelial removal on the P/B iodine ratio
| Concentration PVP-I solution | P/B ratio iodine (mean (SD)) | ||||||
|---|---|---|---|---|---|---|---|
| 20 mg/ml | 100 mg/ml | ||||||
| Exposure time | Corneal layer | with epithelium | epithelium removed | with epithelium | epithelium removed | ||
| 2 minutes | Epithelium | 11 (2) | 115 (19) | ||||
| Bowman’s layer | 6 (4) | 22 (4) | 76 (20) | 40 (6) | |||
| Anterior stroma | 2 (0) | 18 (2) | 41 (9) | 40 (5) | |||
| Mid-stroma | 0 | 13 (5) | 39 (7) | 33 (6) | |||
| 10 minutes | Epithelium | 46 (13) | 126 (22) | ||||
| Bowman’s layer | 23 (7) | 25 (7) | 47 (15) | 75 (26) | |||
| Anterior stroma | 15 (4) | 18 (2) | 36 (8) | 41 (11) | |||
| Mid-stroma | 12 (5) | 14 (4) | 32 (17) | 27 (9) | |||
| 30 minutes | Epithelium | 37 (11) | 173 (18) | ||||
| Bowman’s layer | 19 (7) | 69 (17) | 145 (73) | 107 (26) | |||
| Anterior stroma | 15 (9) | 19 (2) | 87 (22) | 74 (13) | |||
| Mid-stroma | 9 (8) | 13 (3) | 61 (15) | 62 (14) | |||
| Signed rank test | p <0.05 | p >0.05 | |||||