The in vitro eye irritation test is used to evaluate the eye hazard potential of a test chemical based on its ability to induce cytotoxicity in a RhCE tissue construct as measured by the tetrazolium dye.
Test model | EpiOcular Tissues |
Replicates | N=2 tissues per test condition |
Assay controls | Negative control: Ultrapure water Positive control: Methyl acetate |
Exposure time | 6 hours (±0.25 h) – Solids 30 min (±2 min) – Liquids 50 μL or 50 mg of test material per tissue |
Test item quantity | 0.5 ml or 500 mg |
End point | MTT Tissue viability assay |
Data delivery | % relative viability ± SD |
Timeline | 15 days |
Acceptable OD value for EpiDerm model:
- Lower acceptance limit: ≥ 0.8
- Upper acceptance limit: ≤ 2.8
Mean tissue viability (%) | Data prediction |
≤ 60% | Irritant (I) |
> 60% | Non-irritant (NI) |